Leetcode 941 Solution

This article provides solution to leetcode question 941 (sort-array-by-parity)
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https://leetcode.com/problems/sort-array-by-parity

Solution

class Solution {
public:
    vector<int> sortArrayByParity(vector<int>& A) {
        int l = 0;
        int r = A.size() - 1;

        while (l < r)
        {
            while (A[l] % 2 == 0 && l < r)
                l++;

            while (A[r] % 2 == 1 && l < r)
                r--;

            if (l < r)
                swap(A[l++], A[r--]);
        }

        return A;
    }
};