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Codility solution https://codility.com/demo/results/demoGYMPA6-Q73/ Take your own here: https://codility.com/demo/take-sample-test/ This is a demo task. You can read about this task and its solutions in this blog post: http://dev.tasubo.com/2012/09/tips-for-tasks-on-codility.html
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class Solution { | |
public int solution(int[] A) { | |
long left = 0; | |
long right = 0; | |
long sum = sum(A); | |
for (int i = 0; i < A.length; i++) { | |
right = sum - left - A[i]; | |
if (left == right) | |
return i; | |
left += A[i]; | |
} | |
return -1; | |
} | |
private long sum(int[] A) { | |
long sum = 0; | |
for (int i = 0; i < A.length; i++) { | |
sum += A[i]; | |
} | |
return sum; | |
} | |
} |
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