1. You are given an array that contains only 0s and 1s. 2. You have to find length of the longest subarray with equal number of 0s and 1s.
Input Format
A number N arr1 arr2.. N numbers
Output Format
A number representing length of the longest subarray with equal number of 0s and 1s.
Constraints
1 <= N <= 10^5 0 <= arr[i] <= 1
Example
Input
6 0 1 1 0 1 1
Output
4