Test results - Codility

Tasks Details

easy

1. Triangle

Determine whether a triangle can be built from a given set of edges.

Task Score

100%

Correctness

100%

Performance

100%

An array A consisting of N integers is given. A triplet (P, Q, R) is triangular if 0 ≤ P < Q < R < N and:

A[P] + A[Q] > A[R],

A[Q] + A[R] > A[P],

A[R] + A[P] > A[Q].

For example, consider array A such that:

A[0] = 10 A[1] = 2 A[2] = 5 A[3] = 1 A[4] = 8 A[5] = 20

Triplet (0, 2, 4) is triangular.

Write a function:

function solution(A);

that, given an array A consisting of N integers, returns 1 if there exists a triangular triplet for this array and returns 0 otherwise.

For example, given array A such that:

A[0] = 10 A[1] = 2 A[2] = 5 A[3] = 1 A[4] = 8 A[5] = 20

the function should return 1, as explained above. Given array A such that:

A[0] = 10 A[1] = 50 A[2] = 5 A[3] = 1

the function should return 0.

Write an efficient algorithm for the following assumptions:

N is an integer within the range [0..100,000];

each element of array A is an integer within the range [−2,147,483,648..2,147,483,647].

Solution

Programming language used JavaScript

Time spent on task 16 minutes

Notes

not defined yet

Code: 06:53:56 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: 06:54:00 UTC, js, autosave

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// you can write to stdout for debugging purposes, e.g.
// console.log('this is a debug message');

function solution(A) {
    // write your code in JavaScript (Node.js 8.9.4)
}

Code: 07:06:51 UTC, js, autosave

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1 2 3 4 5 6 7 8 9 10

// you can write to stdout for debugging purposes, e.g.
// console.log('this is a debug message');

function solution(A) {
    // write your code in JavaScript (Node.js 8.9.4)
    
    
    A = A.sort((a,b)=>a-b)
    
}

Code: 07:07:01 UTC, js, autosave

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// you can write to stdout for debugging purposes, e.g.
// console.log('this is a debug message');

function solution(A) {
    // write your code in JavaScript (Node.js 8.9.4)
    
    
    A = A.sort((a,b)=>a-b)
    
    
    
    
}

Code: 07:07:29 UTC, js, autosave

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// you can write to stdout for debugging purposes, e.g.
// console.log('this is a debug message');

function solution(A) {
    // write your code in JavaScript (Node.js 8.9.4)
    
    
    A = A.sort((a,b)=>a-b)
    
    
    
    for()
}

Code: 07:07:44 UTC, js, verify, result: Failed

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// you can write to stdout for debugging purposes, e.g.
// console.log('this is a debug message');

function solution(A) {
    // write your code in JavaScript (Node.js 8.9.4)
    
    
    A = A.sort((a,b)=>b-a)
    
    
    console.log(A)
    
}

Analysis

expand all Example tests

▶

example
example, positive answer, length=6

✘

RUNTIME ERROR
tested program terminated with exit code 1

0.124 s

RUNTIME ERROR, tested program terminated with exit code 1

stderr:

Invalid result type, integer expected, 'undefined' found
Perhaps you are missing a 'return'?

stdout:

[ 20, 10, 8, 5, 2, 1 ]

▶

example1
example, answer is zero, length=4

✘

RUNTIME ERROR
tested program terminated with exit code 1

0.092 s

RUNTIME ERROR, tested program terminated with exit code 1

stderr:

Invalid result type, integer expected, 'undefined' found
Perhaps you are missing a 'return'?

stdout:

[ 50, 10, 5, 1 ]

Code: 07:08:16 UTC, js, autosave

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// you can write to stdout for debugging purposes, e.g.
// console.log('this is a debug message');

function solution(A) {
    // write your code in JavaScript (Node.js 8.9.4)
    
    
    A = A.sort((a,b)=>b-a)
    
    
    //console.log(A)
    
}

Code: 07:08:43 UTC, js, autosave

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// you can write to stdout for debugging purposes, e.g.
// console.log('this is a debug message');

function solution(A) {
    // write your code in JavaScript (Node.js 8.9.4)
    
    
    A = A.sort((a,b)=>b-a)
    
    for(var i=0; i < A.length; i++){
        
    }
    //console.log(A)
    
}

Code: 07:08:55 UTC, js, 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.
// console.log('this is a debug message');

function solution(A) {
    // write your code in JavaScript (Node.js 8.9.4)
    
    
    A = A.sort((a,b)=>b-a)
    
    for(var i=0; i < A.length - 2; i++){
        
    }
    //console.log(A)
    
}

Code: 07:09:05 UTC, js, autosave

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// you can write to stdout for debugging purposes, e.g.
// console.log('this is a debug message');

function solution(A) {
    // write your code in JavaScript (Node.js 8.9.4)
    
    
    A = A.sort((a,b)=>b-a)
    
    for(var i=0; i < A.length - 2; i++){
     if()   
    }
    return 0
    //console.log(A)
    
}

Code: 07:09:27 UTC, js, autosave

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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.
// console.log('this is a debug message');

function solution(A) {
    // write your code in JavaScript (Node.js 8.9.4)
    
    
    A = A.sort((a,b)=>b-a)
    
    for(var i=0; i < A.length - 2; i++){
     if(A[i] < A[i+1] + A[i+2])   
    }
    return 0
    //console.log(A)
    
}

Code: 07:09:35 UTC, js, verify, result: Passed

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// you can write to stdout for debugging purposes, e.g.
// console.log('this is a debug message');

function solution(A) {
    // write your code in JavaScript (Node.js 8.9.4)
    
    
    A = A.sort((a,b)=>b-a)
    
    for(var i=0; i < A.length - 2; i++){
     if(A[i] < A[i+1] + A[i+2]){
        return 1 
     }   
    }
    return 0
    //console.log(A)
    
}

Analysis

expand all Example tests

▶

example
example, positive answer, length=6

✔

0.096 s

▶

example1
example, answer is zero, length=4

✔

0.096 s

Code: 07:09:46 UTC, js, verify, result: Passed

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.
// console.log('this is a debug message');

function solution(A) {
    // write your code in JavaScript (Node.js 8.9.4)
    
    
    A = A.sort((a,b)=>b-a)
    
    for(var i=0; i < A.length - 2; i++){
     if(A[i] < A[i+1] + A[i+2]){
        return 1 
     }   
    }
    return 0
    //console.log(A)
    
}

Analysis

expand all Example tests

▶

example
example, positive answer, length=6

✔

0.088 s

▶

example1
example, answer is zero, length=4

✔

0.084 s

Code: 07:09:48 UTC, js, final, score: 100

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.
// console.log('this is a debug message');

function solution(A) {
    // write your code in JavaScript (Node.js 8.9.4)
    
    
    A = A.sort((a,b)=>b-a)
    
    for(var i=0; i < A.length - 2; i++){
     if(A[i] < A[i+1] + A[i+2]){
        return 1 
     }   
    }
    return 0
    //console.log(A)
    
}

Analysis summary

The solution obtained perfect score.

Analysis

Detected time complexity:

O(N*log(N))

expand all Example tests

▶

example
example, positive answer, length=6

✔

0.072 s

▶

example1
example, answer is zero, length=4

✔

0.072 s

expand all Correctness tests

▶

extreme_empty
empty sequence

✔

0.068 s

0.072 s

0.068 s

0.072 s

0.068 s

▶

extreme_single
1-element sequence

✔

0.072 s

▶

extreme_two_elems
2-element sequence

✔

0.072 s

0.068 s

0.072 s

▶

extreme_negative1
three equal negative numbers

✔

0.072 s

▶

extreme_arith_overflow1
overflow test, 3 MAXINTs

✔

0.072 s

▶

extreme_arith_overflow2
overflow test, 10 and 2 MININTs

✔

0.072 s

▶

extreme_arith_overflow3
overflow test, 0 and 2 MAXINTs

✔

0.072 s

▶

medium1
chaotic sequence of values from [0..100K], length=30

✔

0.072 s

▶

medium2
chaotic sequence of values from [0..1K], length=50

✔

0.072 s

0.068 s

▶

medium3
chaotic sequence of values from [0..1K], length=100

✔

0.068 s

0.072 s

0.068 s

0.072 s

expand all Performance tests

▶

large1
chaotic sequence with values from [0..100K], length=10K

✔

0.112 s

0.072 s

▶

large2
1 followed by an ascending sequence of ~50K elements from [0..100K], length=~50K

✔

0.156 s

0.072 s

▶

large_random
chaotic sequence of values from [0..1M], length=100K

✔

0.212 s

0.072 s

▶

large_negative
chaotic sequence of negative values from [-1M..-1], length=100K

✔

0.208 s

0.072 s

▶

large_negative2
chaotic sequence of negative values from [-10..-1], length=100K

✔

0.156 s

0.072 s

▶

large_negative3
sequence of -1 value, length=100K

✔

0.120 s

0.072 s

0.068 s

0.072 s