T027. Remove Element.cpp

class Solution {
public:
        int removeElement(vector<int>& nums, int val) {
            int n = nums.size(),r = 0;
            for (int i = 0; i < n; i++) {
                if(nums[i] != val)
                    nums[r++] = nums[i];
            }
            return r;
        }
};