Question

Write a function that takes an array of integers and returns the length of the longest subarray with sum equal to zero?
function solve( a ){ //write your code here }
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Input: [-5, -3, 7, -2, -7, 1, 6, -7, 1, 4]
Output: 9

Input: [-4, 5, -9, -5, 11, 9, -1]
Output: 0

Input: [11, 0, -1, 8, 5]
Output: 1