remove-element.cpp

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