Test results - Codility

Tasks Details

easy

1. MaxProfit

Given a log of stock prices compute the maximum possible earning.

Task Score

100%

Correctness

100%

Performance

100%

An array A consisting of N integers is given. It contains daily prices of a stock share for a period of N consecutive days. If a single share was bought on day P and sold on day Q, where 0 ≤ P ≤ Q < N, then the profit of such transaction is equal to A[Q] − A[P], provided that A[Q] ≥ A[P]. Otherwise, the transaction brings loss of A[P] − A[Q].

For example, consider the following array A consisting of six elements such that:

A[0] = 23171 A[1] = 21011 A[2] = 21123 A[3] = 21366 A[4] = 21013 A[5] = 21367

If a share was bought on day 0 and sold on day 2, a loss of 2048 would occur because A[2] − A[0] = 21123 − 23171 = −2048. If a share was bought on day 4 and sold on day 5, a profit of 354 would occur because A[5] − A[4] = 21367 − 21013 = 354. Maximum possible profit was 356. It would occur if a share was bought on day 1 and sold on day 5.

Write a function,

def solution(A)

that, given an array A consisting of N integers containing daily prices of a stock share for a period of N consecutive days, returns the maximum possible profit from one transaction during this period. The function should return 0 if it was impossible to gain any profit.

For example, given array A consisting of six elements such that:

A[0] = 23171 A[1] = 21011 A[2] = 21123 A[3] = 21366 A[4] = 21013 A[5] = 21367

the function should return 356, as explained above.

Write an efficient algorithm for the following assumptions:

N is an integer within the range [0..400,000];

each element of array A is an integer within the range [0..200,000].

Solution

Programming language used Python

Time spent on task 25 minutes

Notes

not defined yet

Code: 17:53:20 UTC, java, autosave

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// you can also use imports, for example:
// import java.util.*;

// you can write to stdout for debugging purposes, e.g.
// System.out.println("this is a debug message");

class Solution {
    public int solution(int[] A) {
        // write your code in Java SE 8
    }
}

Code: 17:53:26 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    # write your code in Python 3.6
    pass

Code: 17:54:17 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    max_ending = max_slice = 0 
    for a in A[1:]:
        max_ending = max(a,max_ending + a)
        max_slice = max(max_slice, max_ending)
        
    return max_slice

Code: 17:54:27 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    max_ending = max_slice = 0 
    for a in A:
        max_ending = max(0,max_ending + a)
        max_slice = max(max_slice, max_ending)
        
    return max_slice

Code: 17:54:33 UTC, py, verify, result: Failed

show code in pop-up

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    max_ending = max_slice = 0 
    for a in A:
        max_ending = max(0,max_ending + a)
        max_slice = max(max_slice, max_ending)
        
    return max_slice

Analysis

expand all Example tests

▶

example
example, length=6

✘

WRONG ANSWER
got 129051 expected 356

0.036 s

WRONG ANSWER, got 129051 expected 356

Code: 17:54:50 UTC, py, verify, result: Failed

show code in pop-up

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    max_ending = max_slice = 0 
    for a in A:
        max_ending = max(0,max_ending - a)
        max_slice = max(max_slice, max_ending)
        
    return max_slice

Analysis

expand all Example tests

▶

example
example, length=6

✘

WRONG ANSWER
got 0 expected 356

0.036 s

WRONG ANSWER, got 0 expected 356

Code: 17:55:38 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    day = max_slice = 0 
    for a in A:
        max_ending = max(0,max_ending - a)
        max_slice = max(max_slice, max_ending)
        
    return max_slice

Code: 17:55:53 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    day_profi = max_profit = 0 
    for a in A:
        max_ending = max(0,max_ending - a)
        max_slice = max(max_slice, max_ending)
        
    return max_slice

Code: 17:56:04 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    day_profit = max_profit = 0 
    for a in A:
        day_profit = max(0,max_ending - a)
        max_slice = max(max_slice, max_ending)
        
    return max_slice

Code: 17:56:14 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    day_profit = max_profit = 0 
    for a in A:
        day_profit = max(0, day_profit - a)
        max_slice = max(max_slice, max_ending)
        
    return max_slice

Code: 17:56:27 UTC, py, autosave

show code in pop-up

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    day_profit = max_profit = 0 
    for a in A:
        day_profit = max(0, a - day_profit)
        max_slice = max(max_slice, day_profit)
        
    return max_slice

Code: 17:56:34 UTC, py, verify, result: Failed

show code in pop-up

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    day_profit = max_profit = 0 
    for a in A:
        day_profit = max(0, a - day_profit)
        max_profit = max(max_profit, day_profit)
        
    return max_profit

Analysis

expand all Example tests

▶

example
example, length=6

✘

WRONG ANSWER
got 23171 expected 356

0.056 s

WRONG ANSWER, got 23171 expected 356

Code: 17:56:48 UTC, py, verify, result: Failed

show code in pop-up

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    day_profit = max_profit = 0 
    for a in A:
        print(a)
        day_profit = max(0, a - day_profit)
        max_profit = max(max_profit, day_profit)
        
    return max_profit

Analysis

expand all Example tests

▶

example
example, length=6

✘

WRONG ANSWER
got 23171 expected 356

0.036 s

WRONG ANSWER, got 23171 expected 356

stdout:

Code: 17:57:08 UTC, py, autosave

show code in pop-up

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    day_profit = max_profit = 0 
    for a in A[]:
        print(a)
        day_profit = max(0, a - day_profit)
        max_profit = max(max_profit, day_profit)
        
    return max_profit

Code: 17:57:19 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    day_profit = max_profit = 0 
    for a in A[1:]:
        print(a)
        day_profit = max(0, a - day_profit)
        max_profit = max(max_profit, day_profit)
        
    return max_profit

Code: 17:57:49 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    day_profit = max_profit = 0
    buy_pri
    for a in A[1:]:
        print(a)
        day_profit = max(0, a - day_profit)
        max_profit = max(max_profit, day_profit)
        
    return max_profit

Code: 17:58:10 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    day_profit = max_profit = 0
    buy_price = A[0]
    sell_price = [A1]
    for a in A[2:]:
        print(a)
        day_profit = max(0, a - day_profit)
        max_profit = max(max_profit, day_profit)
        
    return max_profit

Code: 17:58:22 UTC, py, autosave

show code in pop-up

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    day_profit = max_profit = 0
    buy_price = A[0]
    sell_price = [A1]
    for a in A[2:]:
        print(a)
        day_profit = max(0, a - buy_price)
        max_profit = max(max_profit, day_profit)
        
    return max_profit

Code: 17:58:33 UTC, py, autosave

show code in pop-up

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    day_profit = max_profit = 0
    buy_price = A[0]
    sell_price = [A1]
    for a in A[2:]:
        print(a)
        day_profit = max(0, sell_price - buy_price)
        max_profit = max(max_profit, day_profit)
        
    return max_profit

Code: 17:58:58 UTC, py, autosave

show code in pop-up

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    day_profit = max_profit = 0
    buy_price = A[0]
    sell_price = [A1]
    for a in A[2:]:
        print(a)
        
        day_profit = max(0, sell_price - buy_price)
        max_profit = max(max_profit, day_profit)
        
    return max_profit

Code: 17:59:08 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    max_profit = 0
    buy_price = A[0]
    sell_price = [A1]
    for a in A[2:]:
        print(a)
        
        day_profit = max(0, sell_price - buy_price)
        max_profit = max(max_profit, day_profit)
        
    return max_profit

Code: 17:59:45 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    daymax_profit = 0
    buy_price = A[0]
    sell_price = [A1]
    for a in A[2:]:
        print(a)
        
        day_profit = max(0, sell_price - buy_price)
        max_profit = max(max_profit, day_profit)
        
    return max_profit

Code: 18:00:00 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    buy_price = A[0]
    sell_price = [A1]
    for a in A[2:]:
        print(a)
        
        day_profit = max(0, sell_price - buy_price)
        max_profit = max(max_profit, day_profit)
        
    return max_profit

Code: 18:00:13 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    buy_price = A[0]
    sell_price = [A1]
    for a in A:
        print(a)
        
        day_profit = max(0, sell_price - buy_price)
        max_profit = max(max_profit, day_profit)
        
    return max_profit

Code: 18:00:24 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    day_profit = max_profit = 0
    for a in A:
        print(a)
        
        day_profit = max(0, sell_price - buy_price)
        max_profit = max(max_profit, day_profit)
        
    return max_profit

Code: 18:01:34 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    day_profit = max_profit = 0
    for a in A:
        print(a)
        
        day_profit = max(0, day_profit - buy_price)
        max_profit = max(max_profit, day_profit)
        
    return max_profit

Code: 18:01:44 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    day_profit = max_profit = 0
    for a in A:
        print(a)
        
        day_profit = max(0, day_profit - (buy_price)
        max_profit = max(max_profit, day_profit)
        
    return max_profit

Code: 18:02:00 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    day_profit = max_profit = 0
    for a in A:
        print(a)
        
        day_profit = max(0, day_profit - (buy_price))
        max_profit = max(max_profit, day_profit)
        
    return max_profit

Code: 18:02:30 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    day_profit = max_profit = 0
    buy_price = sell_price =
    for a in A:
        print(a)
        
        day_profit = max(0, day_profit - (buy_price))
        max_profit = max(max_profit, day_profit)
        
    return max_profit

Code: 18:02:31 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    day_profit = max_profit = 0
    buy_price = sell_price = None
    for a in A:
        print(a)
        
        day_profit = max(0, day_profit - (buy_price))
        max_profit = max(max_profit, day_profit)
        
    return max_profit

Code: 18:02:43 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    day_profit = max_profit = 0
    buy_price = sell_price = None
    for a in A:
        if not 
        
        day_profit = max(0, day_profit - (buy_price))
        max_profit = max(max_profit, day_profit)
        
    return max_profit

Code: 18:03:01 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    day_profit = max_profit = 0
    buy_price = sell_price = None
    for a in A:
        if not buy_price and not sell_price:
            
        
        day_profit = max(0, day_profit - (buy_price))
        max_profit = max(max_profit, day_profit)
        
    return max_profit

Code: 18:03:11 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    day_profit = max_profit = 0
    buy_price = sell_price = None
    for a in A:
        if not buy_price and not sell_price:
            buy_price = sell_price = a
        
        day_profit = max(0, day_profit - (buy_price))
        max_profit = max(max_profit, day_profit)
        
    return max_profit

Code: 18:03:21 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    day_profit = max_profit = 0
    buy_price = sell_price = None
    for a in A:
        if not buy_price and not sell_price:
            buy_price = sell_price = a
        
        day_profit = max(0, buy_price - (buy_price))
        max_profit = max(max_profit, day_profit)
        
    return max_profit

Code: 18:03:41 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    day_profit = max_profit = 0
    buy_price = sell_price = None
    for a in A:
        if not buy_price and not sell_price:
            buy_price = sell_price = a
        
        day_profit = max(0, a - buy_price)
        max_profit = max(max_profit, day_profit)
        
    return max_profit

Code: 18:07:00 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    day_profit = max_profit = 0
    min 
    for a in A:
        if not buy_price and not sell_price:
            buy_price = sell_price = a
        
        day_profit = max(0, a - buy_price)
        max_profit = max(max_profit, day_profit)
        
    return max_profit

Code: 18:07:04 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    day_profit = max_profit = 0
    minPrice = 
    for a in A:
        if not buy_price and not sell_price:
            buy_price = sell_price = a
        
        day_profit = max(0, a - buy_price)
        max_profit = max(max_profit, day_profit)
        
    return max_profit

Code: 18:07:09 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    day_profit = max_profit = 0
    minPrice = A[0]
    for a in A:
        if not buy_price and not sell_price:
            buy_price = sell_price = a
        
        day_profit = max(0, a - buy_price)
        max_profit = max(max_profit, day_profit)
        
    return max_profit

Code: 18:07:17 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    day_profit = max_profit = 0
    minPrice = A[0]
    for a in A[1:]:
        if not buy_price and not sell_price:
            buy_price = sell_price = a
        
        day_profit = max(0, a - buy_price)
        max_profit = max(max_profit, day_profit)
        
    return max_profit

Code: 18:07:33 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    day_profit = max_profit = 0
    minPrice = maxPrice = A[0]
    for a in A[1:]:
        if not buy_price and not sell_price:
            buy_price = sell_price = a
        
        day_profit = max(0, a - buy_price)
        max_profit = max(max_profit, day_profit)
        
    return max_profit

Code: 18:08:42 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    day_profit = max_profit = 0
    minPrice = maxPrice = A[0]
    for a in A[1:]:
        minPrice = maxPrice = A[0]
        
        day_profit = max(0, a - buy_price)
        max_profit = max(max_profit, day_profit)
        
    return max_profit

Code: 18:08:56 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    day_profit = max_profit = 0
    minPrice = maxPrice = A[0]
    for a in A[1:]:
        minPrice = 
        maxPrice = max(0, a - buy_price)
        
        day_profit = max(0, a - buy_price)
        max_profit = max(max_profit, day_profit)
        
    return max_profit

Code: 18:09:10 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    day_profit = max_profit = 0
    minPrice = maxPrice = A[0]
    for a in A[1:]:
        minPrice = min(0,
        maxPrice = max(0, a)
        
        day_profit = max(0, a - buy_price)
        max_profit = max(max_profit, day_profit)
        
    return max_profit

Code: 18:09:24 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    day_profit = max_profit = 0
    minPrice = maxPrice = A[0]
    for a in A[1:]:
        minPrice = min(minPrice, a)
        maxPrice = max(maxPrice, a)
        
        day_profit = max(0, a - buy_price)
        max_profit = max(max_profit, day_profit)
        
    return max_profit

Code: 18:09:26 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    max_profit = 0
    minPrice = maxPrice = A[0]
    for a in A[1:]:
        minPrice = min(minPrice, a)
        maxPrice = max(maxPrice, a)
        
        day_profit = max(0, a - buy_price)
        max_profit = max(max_profit, day_profit)
        
    return max_profit

Code: 18:09:33 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    max_profit = 0
    minPrice = maxPrice = A[0]
    for a in A[1:]:
        minPrice = min(minPrice, a)
        maxPrice = max(maxPrice, a)
        
    return max_profit

Code: 18:10:03 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    max_profit = 0
    minPrice = maxPrice = A
    for a in A[1:]:
        minPrice = min(minPrice, a)
        maxPrice = max(maxPrice, a)
        
    return max_profit

Code: 18:10:13 UTC, py, autosave

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# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    max_profit = 0
    minPrice = maxPrice = None
    for a in A:
        minPrice = min(minPrice, a)
        maxPrice = max(maxPrice, a)
        
    return max_profit

Code: 18:10:36 UTC, py, autosave

show code in pop-up

1 2 3 4 5 6 7 8 9 10 11 12 13

# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    max_profit = 0
    minPrice = maxPrice = None
    for a in A:
        if not minPrice and not maxPrice:
            
        minPrice = min(minPrice, a)
        maxPrice = max(maxPrice, a)
        
    return max_profit

Code: 18:10:48 UTC, py, autosave

show code in pop-up

1 2 3 4 5 6 7 8 9 10 11 12 13 14

# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    max_profit = 0
    minPrice = maxPrice = None
    for a in A:
        if not minPrice and not maxPrice:
            minPrice = maxPrice = a
        else:
        minPrice = min(minPrice, a)
        maxPrice = max(maxPrice, a)
        
    return max_profit

Code: 18:10:59 UTC, py, autosave

show code in pop-up

1 2 3 4 5 6 7 8 9 10 11 12 13 14

# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    max_profit = 0
    minPrice = maxPrice = None
    for a in A:
        if not minPrice and not maxPrice:
            minPrice = maxPrice = a
        else:
            minPrice = min(minPrice, a)
            maxPrice = max(maxPrice, a)
        
    return max_profit

Code: 18:11:15 UTC, py, autosave

show code in pop-up

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    max_profit = 0
    minPrice = maxPrice = None
    for a in A:
        if not minPrice and not maxPrice:
            minPrice = maxPrice = a
        else:
            minPrice = min(minPrice, a)
            maxPrice = max(maxPrice, a)
    
    
        
    return max_profit

Code: 18:11:26 UTC, py, autosave

show code in pop-up

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    max_profit = 0
    minPrice = maxPrice = None
    for a in A:
        if not minPrice and not maxPrice:
            minPrice = maxPrice = a
        else:
            minPrice = min(minPrice, a)
            maxPrice = max(maxPrice, a)
    
    if minPrice and maxPrice:
        
    return max_profit

Code: 18:11:49 UTC, py, autosave

show code in pop-up

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    max_profit = 0
    minPrice = maxPrice = None
    for a in A:
        if not minPrice and not maxPrice:
            minPrice = maxPrice = a
        else:
            minPrice = min(minPrice, a)
            maxPrice = max(maxPrice, a)
    
    if minPrice < maxPrice:
        max_profit = maxPrice - 
        
    return max_profit

Code: 18:11:50 UTC, py, verify, result: Failed

show code in pop-up

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    max_profit = 0
    minPrice = maxPrice = None
    for a in A:
        if not minPrice and not maxPrice:
            minPrice = maxPrice = a
        else:
            minPrice = min(minPrice, a)
            maxPrice = max(maxPrice, a)
    
    if minPrice < maxPrice:
        max_profit = maxPrice - minPrice
        
    return max_profit

Analysis

expand all Example tests

▶

example
example, length=6

✘

WRONG ANSWER
got 2160 expected 356

0.036 s

WRONG ANSWER, got 2160 expected 356

Code: 18:12:44 UTC, py, autosave

show code in pop-up

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    max_profit = 0
    minPrice =  None
    for a in A:
        if not minPrice and not maxPrice:
            minPrice = maxPrice = a
        else:
            minPrice = min(minPrice, a)
            maxPrice = max(maxPrice, a)
    
    if minPrice < maxPrice:
        max_profit = maxPrice - minPrice
        
    return max_profit

Code: 18:13:05 UTC, py, autosave

show code in pop-up

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    max_profit = 0
    minPrice = None
    for a in A:
        if not minPrice:
            minPrice = a
        else:
            minPrice = min(minPrice, a)
            maxPrice = max(maxPrice, a)
    
    if minPrice < maxPrice:
        max_profit = maxPrice - minPrice
        
    return max_profit

Code: 18:13:25 UTC, py, autosave

show code in pop-up

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    max_profit = 0
    minPrice = None
    for a in A:
        if not minPrice:
            minPrice = a
        else:
            max_ending = max(a,max_ending + a)
            max_slice = max(max_slice, max_ending)
    
    if minPrice < maxPrice:
        max_profit = maxPrice - minPrice
        
    return max_profit

Code: 18:13:42 UTC, py, autosave

show code in pop-up

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    max_profit = 0
    minPrice = None
    for a in A:
        if not minPrice:
            minPrice = a
        else:
            max_ending = max(0, a - max_ending)
            max_slice = max(max_slice, max_ending)
    
    if minPrice < maxPrice:
        max_profit = maxPrice - minPrice
        
    return max_profit

Code: 18:13:55 UTC, py, autosave

show code in pop-up

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    max_profit = 0
    minPrice = None
    for a in A:
        if not minPrice:
            minPrice = a
            max_ending = max(0, a - max_ending)
            max_slice = max(max_slice, max_ending)
    
    if minPrice < maxPrice:
        max_profit = maxPrice - minPrice
        
    return max_profit

Code: 18:14:12 UTC, py, autosave

show code in pop-up

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    max_profit = 0
    minPrice = None
    for a in A:
        if not minPrice:
            minPrice = a
            
        max_ending = max(0, a - max_ending)
        minPrice = min(minPrice,a)
        max_slice = max(max_slice, max_ending)

    if minPrice < maxPrice:
        max_profit = maxPrice - minPrice
        
    return max_profit

Code: 18:14:37 UTC, py, autosave

show code in pop-up

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    max_profit = 0
    minPrice = None
    for a in A:
        if not minPrice:
            minPrice = a
            
        max_ending = max(0, a - max_ending)
        minPrice = min(minPrice,a)
        max_slice = max(max_slice, max_ending)

    return max_profit

Code: 18:14:49 UTC, py, autosave

show code in pop-up

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    max_slice =  = 0
    minPrice = None
    for a in A:
        if not minPrice:
            minPrice = a
            
        max_ending = max(0, a - max_ending)
        minPrice = min(minPrice,a)
        max_slice = max(max_slice, max_ending)

    return max_profit

Code: 18:14:52 UTC, py, verify, result: Failed

show code in pop-up

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    max_slice = max_ending = 0
    minPrice = None
    for a in A:
        if not minPrice:
            minPrice = a
            
        max_ending = max(0, a - max_ending)
        minPrice = min(minPrice,a)
        max_slice = max(max_slice, max_ending)

    return max_profit

Analysis

expand all Example tests

▶

example
example, length=6

✘

RUNTIME ERROR
tested program terminated with exit code 1

0.036 s

RUNTIME ERROR, tested program terminated with exit code 1

stderr:

Traceback (most recent call last):
  File "exec.py", line 129, in <module>
    main()
  File "exec.py", line 91, in main
    result = solution( A )
  File "/tmp/solution.py", line 15, in solution
    return max_profit
NameError: name 'max_profit' is not defined

Code: 18:15:06 UTC, py, verify, result: Failed

show code in pop-up

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    max_slice = max_ending = 0
    minPrice = None
    for a in A:
        if not minPrice:
            minPrice = a
            
        max_ending = max(0, a - max_ending)
        minPrice = min(minPrice,a)
        max_slice = max(max_slice, max_ending)

    return max_slice

Analysis

expand all Example tests

▶

example
example, length=6

✘

WRONG ANSWER
got 23171 expected 356

0.036 s

WRONG ANSWER, got 23171 expected 356

Code: 18:15:19 UTC, py, autosave

show code in pop-up

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    max_slice = max_ending = 0
    minPrice = None
    for a in A[1]:
        if not minPrice:
            minPrice = a
            
        max_ending = max(0, a - max_ending)
        minPrice = min(minPrice,a)
        max_slice = max(max_slice, max_ending)

    return max_slice

Code: 18:15:38 UTC, py, autosave

show code in pop-up

1 2 3 4 5 6 7 8 9 10 11 12

# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    max_slice = max_ending = 0
    minPrice = A[0]
    for a in A[1:]
        max_ending = max(0, a - max_ending)
        minPrice = min(minPrice,a)
        max_slice = max(max_slice, max_ending)

    return max_slice

Code: 18:15:58 UTC, py, autosave

show code in pop-up

1 2 3 4 5 6 7 8 9 10 11 12 13 14

# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    if len(A) < 2: return 0
    
    max_slice = max_ending = 0
    minPrice = A[0]
    for a in A[1:]
        max_ending = max(0, a - max_ending)
        minPrice = min(minPrice,a)
        max_slice = max(max_slice, max_ending)

    return max_slice

Code: 18:16:05 UTC, py, verify, result: Failed

show code in pop-up

1 2 3 4 5 6 7 8 9 10 11 12 13 14

# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    if len(A) < 2: return 0
    
    max_slice = max_ending = 0
    minPrice = A[0]
    for a in A[1:]
        max_ending = max(0, a - max_ending)
        minPrice = min(minPrice,a)
        max_slice = max(max_slice, max_ending)

    return max_slice

Analysis

expand all Example tests

▶

example
example, length=6

✘

RUNTIME ERROR
tested program terminated with exit code 1

0.036 s

RUNTIME ERROR, tested program terminated with exit code 1

stderr:

Traceback (most recent call last):
  File "exec.py", line 129, in <module>
    main()
  File "exec.py", line 70, in main
    sol = __import__('solution')
  File "/tmp/solution.py", line 9
    for a in A[1:]
                 ^
SyntaxError: invalid syntax

Code: 18:16:10 UTC, py, autosave

show code in pop-up

1 2 3 4 5 6 7 8 9 10 11 12 13 14

# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    if len(A) < 2: return 0
    
    max_slice = max_ending = 0
    minPrice = A[0]
    for a in A[1:]:
        max_ending = max(0, a - max_ending)
        minPrice = min(minPrice,a)
        max_slice = max(max_slice, max_ending)

    return max_slice

Code: 18:16:11 UTC, py, verify, result: Failed

show code in pop-up

1 2 3 4 5 6 7 8 9 10 11 12 13 14

# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    if len(A) < 2: return 0
    
    max_slice = max_ending = 0
    minPrice = A[0]
    for a in A[1:]:
        max_ending = max(0, a - max_ending)
        minPrice = min(minPrice,a)
        max_slice = max(max_slice, max_ending)

    return max_slice

Analysis

expand all Example tests

▶

example
example, length=6

✘

WRONG ANSWER
got 21367 expected 356

0.036 s

WRONG ANSWER, got 21367 expected 356

Code: 18:16:49 UTC, py, autosave

show code in pop-up

1 2 3 4 5 6 7 8 9 10 11 12 13 14

# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    if len(A) < 2: return 0
    
    max_slice = max_ending = 0
    minPrice = A[0]
    for a in A[1:]:
        max_ending = max(0, a - minPrice)
        minPrice = min(minPrice,a)
        max_slice = max(max_slice, max_ending)

    return max_slice

Code: 18:16:55 UTC, py, verify, result: Passed

show code in pop-up

1 2 3 4 5 6 7 8 9 10 11 12 13 14

# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    if len(A) < 2: return 0
    
    max_slice = max_ending = 0
    minPrice = A[0]
    for a in A[1:]:
        max_ending = max(0, a - minPrice)
        minPrice = min(minPrice,a)
        max_slice = max(max_slice, max_ending)

    return max_slice

Analysis

expand all Example tests

▶

example
example, length=6

✔

0.036 s

Code: 18:17:30 UTC, py, verify, result: Passed

show code in pop-up

1 2 3 4 5 6 7 8 9 10 11 12 13 14

# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    if len(A) < 2: return 0
    
    max_slice = max_ending = 0
    minPrice = A[0]
    for a in A[1:]:
        max_ending = max(0, a - minPrice)
        minPrice = min(minPrice,a)
        max_slice = max(max_slice, max_ending)

    return max_slice

Analysis

expand all Example tests

▶

example
example, length=6

✔

0.036 s

Code: 18:17:32 UTC, py, final, score: 100

show code in pop-up

1 2 3 4 5 6 7 8 9 10 11 12 13 14

# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    if len(A) < 2: return 0
    
    max_slice = max_ending = 0
    minPrice = A[0]
    for a in A[1:]:
        max_ending = max(0, a - minPrice)
        minPrice = min(minPrice,a)
        max_slice = max(max_slice, max_ending)

    return max_slice

Analysis summary

The solution obtained perfect score.

Analysis

Detected time complexity:

O(N)

expand all Example tests

▶

example
example, length=6

✔

0.036 s

expand all Correctness tests

▶

simple_1
V-pattern sequence, length=7

✔

0.036 s

▶

simple_desc
descending and ascending sequence, length=5

✔

0.036 s

0.040 s

▶

simple_empty
empty and [0,200000] sequence

✔

0.036 s

▶

two_hills
two increasing subsequences

✔

0.036 s

▶

max_profit_after_max_and_before_min
max profit is after global maximum and before global minimum

✔

0.036 s

expand all Performance tests

▶

medium_1
large value (99) followed by short V-pattern (values from [1..5]) repeated 100 times

✔

0.040 s

▶

large_1
large value (99) followed by short pattern (values from [1..6]) repeated 10K times

✔

0.208 s

▶

large_2
chaotic sequence of 200K values from [100K..120K], then 200K values from [0..100K]

✔

0.744 s

▶

large_3
chaotic sequence of 200K values from [1..200K]

✔

0.360 s