remove-element.cc

// https://oj.leetcode.com/problems/remove-element/

class Solution {
public:
    int removeElement(int a[], int n, int elem) {
        int k = 0;

        for (int i = 0; i < n; i++) {
            if (a[i] != elem) {
                a[k++] = a[i];
            }
        }

        return k;
    }
};