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 9 minutes

Notes

not defined yet

Code: 08:42:17 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: 08:42:20 UTC, js, autosave

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1 2 3 4 5 6

// 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: 08:44:05 UTC, js, autosave

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1 2 3 4 5 6 7

// 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)
    const sortedA = A.sort((a,b))
}

Code: 08:44:25 UTC, js, verify, result: Failed

show code in pop-up

1 2 3 4 5 6 7 8

// 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)
    const sortedA = A.sort((a,b)=>a-b);
    console.log(sortedA)
}

Analysis

expand all Example tests

▶

example
example, positive answer, length=6

✘

RUNTIME ERROR
tested program terminated with exit code 1

0.076 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:

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

▶

example1
example, answer is zero, length=4

✘

RUNTIME ERROR
tested program terminated with exit code 1

0.084 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:

[ 1, 5, 10, 50 ]

Code: 08:45:01 UTC, js, autosave

show code in pop-up

1 2 3 4 5 6 7 8

// 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)
    const sortedA = A.sort((a,b)=>a-b);
    
}

Code: 08:45:29 UTC, js, autosave

show code in pop-up

1 2 3 4 5 6 7 8

// 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)
    const sortedA = A.sort((a,b)=>a-b);
    sortedA.reduce(())
}

Code: 08:45:59 UTC, js, autosave

show code in pop-up

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)
    const sortedA = A.sort((a,b)=>a-b);
    for(let i of sortedA){
        
    }
}

Code: 08:46:02 UTC, js, verify, result: Failed

show code in pop-up

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)
    const sortedA = A.sort((a,b)=>a-b);
    for(let i of sortedA){
        console.log(i)
    }
}

Analysis

expand all Example tests

▶

example
example, positive answer, length=6

✘

RUNTIME ERROR
tested program terminated with exit code 1

0.076 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:

▶

example1
example, answer is zero, length=4

✘

RUNTIME ERROR
tested program terminated with exit code 1

0.072 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:

Code: 08:46:31 UTC, js, autosave

show code in pop-up

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.sort((a,b)=>a-b);
    for(let i of sortedA){
        console.log(i)
    }
}

Code: 08:46:35 UTC, js, verify, result: Failed

show code in pop-up

1 2 3 4 5 6 7 8

// 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.sort((a,b)=>a-b);
    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:

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

▶

example1
example, answer is zero, length=4

✘

RUNTIME ERROR
tested program terminated with exit code 1

0.128 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:

[ 1, 5, 10, 50 ]

Code: 08:46:43 UTC, js, autosave

show code in pop-up

1 2 3 4 5 6 7 8

// 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.sort((a,b)=>a-b);
    
}

Code: 08:47:12 UTC, js, autosave

show code in pop-up

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.sort((a,b)=>a-b);
    for(let i =0; i<A.length; i++){
        
    }
}

Code: 08:47:35 UTC, js, verify, result: Failed

show code in pop-up

1 2 3 4 5 6 7 8 9 10 11

// 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.sort((a,b)=>a-b);
    for(let i =0; i<A.length; i++){
        if(A[i]+A[i+1]<A[i+2]) return 1;
    }
    return 0;
}

Analysis

expand all Example tests

▶

example
example, positive answer, length=6

✔

0.072 s

▶

example1
example, answer is zero, length=4

✘

WRONG ANSWER
got 1 expected 0

0.072 s

WRONG ANSWER, got 1 expected 0

Code: 08:47:50 UTC, js, autosave

show code in pop-up

1 2 3 4 5 6 7 8 9 10 11

// 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.sort((a,b)=>a-b);
    for(let i =0; i<A.length-2; i++){
        if(A[i]+A[i+1]<A[i+2]) return 1;
    }
    return 0;
}

Code: 08:47:51 UTC, js, verify, result: Failed

show code in pop-up

1 2 3 4 5 6 7 8 9 10 11

// 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.sort((a,b)=>a-b);
    for(let i =0; i<A.length-2; i++){
        if(A[i]+A[i+1]<A[i+2]) return 1;
    }
    return 0;
}

Analysis

expand all Example tests

▶

example
example, positive answer, length=6

✔

0.072 s

▶

example1
example, answer is zero, length=4

✘

WRONG ANSWER
got 1 expected 0

0.072 s

WRONG ANSWER, got 1 expected 0

Code: 08:48:02 UTC, js, verify, result: Passed

show code in pop-up

1 2 3 4 5 6 7 8 9 10 11

// 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.sort((a,b)=>a-b);
    for(let i =0; i<A.length-2; i++){
        if(A[i]+A[i+1]>A[i+2]) return 1;
    }
    return 0;
}

Analysis

expand all Example tests

▶

example
example, positive answer, length=6

✔

0.120 s

▶

example1
example, answer is zero, length=4

✔

0.116 s

Code: 08:48:07 UTC, js, verify, result: Passed

show code in pop-up

1 2 3 4 5 6 7 8 9 10 11

// 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.sort((a,b)=>a-b);
    for(let i =0; i<A.length-3; i++){
        if(A[i]+A[i+1]>A[i+2]) return 1;
    }
    return 0;
}

Analysis

expand all Example tests

▶

example
example, positive answer, length=6

✔

0.072 s

▶

example1
example, answer is zero, length=4

✔

0.072 s

Code: 08:48:10 UTC, js, verify, result: Passed

show code in pop-up

1 2 3 4 5 6 7 8 9 10 11

// 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.sort((a,b)=>a-b);
    for(let i =0; i<A.length-2; i++){
        if(A[i]+A[i+1]>A[i+2]) return 1;
    }
    return 0;
}

Analysis

expand all Example tests

▶

example
example, positive answer, length=6

✔

0.072 s

▶

example1
example, answer is zero, length=4

✔

0.072 s

Code: 08:48:32 UTC, js, 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.
// console.log('this is a debug message');

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

Code: 08:48:43 UTC, js, 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.
// console.log('this is a debug message');

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

Code: 08:49:08 UTC, js, 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.
// console.log('this is a debug message');

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

Code: 08:49:29 UTC, js, 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.
// console.log('this is a debug message');

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

Code: 08:49:32 UTC, js, verify, result: Failed

show code in pop-up

1 2 3 4 5 6 7 8

// 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.sort((a,b)=>a-b);
    return A.some((v,i)=> v +A[i+1]>A[i+2]);
}

Analysis

expand all Example tests

▶

example
example, positive answer, length=6

✘

RUNTIME ERROR
tested program terminated with exit code 1

0.076 s

RUNTIME ERROR, tested program terminated with exit code 1

stderr:

Invalid result type, integer expected, 'boolean' found

▶

example1
example, answer is zero, length=4

✘

RUNTIME ERROR
tested program terminated with exit code 1

0.072 s

RUNTIME ERROR, tested program terminated with exit code 1

stderr:

Invalid result type, integer expected, 'boolean' found

Code: 08:50:02 UTC, js, autosave

show code in pop-up

1 2 3 4 5 6 7 8

// 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.sort((a,b)=>a-b);
    return A.some((v,i)=> v +A[i+1]>A[i+2]) ? 1;
}

Code: 08:50:04 UTC, js, verify, result: Passed

show code in pop-up

1 2 3 4 5 6 7 8

// 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.sort((a,b)=>a-b);
    return A.some((v,i)=> v +A[i+1]>A[i+2]) ? 1 : 0;
}

Analysis

expand all Example tests

▶

example
example, positive answer, length=6

✔

0.072 s

▶

example1
example, answer is zero, length=4

✔

0.072 s

Code: 08:50:12 UTC, js, autosave

show code in pop-up

1 2 3 4 5 6 7 8

// 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.sort((a,b)=>a-b);
    return A.some((v,i)=> v+A[i+1]>A[i+2]) ? 1 : 0;
}

Code: 08:50:13 UTC, js, verify, result: Passed

show code in pop-up

1 2 3 4 5 6 7 8

// 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.sort((a,b)=>a-b);
    return A.some((v,i)=> v+A[i+1]>A[i+2]) ? 1 : 0;
}

Analysis

expand all Example tests

▶

example
example, positive answer, length=6

✔

0.072 s

▶

example1
example, answer is zero, length=4

✔

0.072 s

Code: 08:50:18 UTC, js, verify, result: Passed

show code in pop-up

1 2 3 4 5 6 7 8

// 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.sort((a,b)=>a-b);
    return A.some((v,i)=>v+A[i+1]>A[i+2]) ? 1 : 0;
}

Analysis

expand all Example tests

▶

example
example, positive answer, length=6

✔

0.072 s

▶

example1
example, answer is zero, length=4

✔

0.072 s

Code: 08:50:21 UTC, js, verify, result: Passed

show code in pop-up

1 2 3 4 5 6 7 8

// 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.sort((a,b)=>a-b);
    return A.some((v,i)=>v+A[i+1]>A[i+2]) ? 1 : 0;
}

Analysis

expand all Example tests

▶

example
example, positive answer, length=6

✔

0.072 s

▶

example1
example, answer is zero, length=4

✔

0.072 s

Code: 08:50:23 UTC, js, final, score: 100

show code in pop-up

1 2 3 4 5 6 7 8

// 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.sort((a,b)=>a-b);
    return A.some((v,i)=>v+A[i+1]>A[i+2]) ? 1 : 0;
}

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

▶

extreme_single
1-element sequence

✔

0.072 s

▶

extreme_two_elems
2-element sequence

✔

0.072 s

0.080 s

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

▶

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

✔

0.072 s

expand all Performance tests

▶

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

✔

0.116 s

0.072 s

▶

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

✔

0.152 s

0.072 s

▶

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

✔

0.216 s

0.072 s

▶

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

✔

0.212 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