Method removeElement

C++/remove-element.cpp:8–22

class Solution {
public:
    int removeElement(vector<int>& nums, int val) {
        int slow=0;
        int fast = 0;

            
        while (fast < nums.size()){
            
            if (nums[fast]!=val){nums[slow++]=nums[fast];}
            fast++;

        }
        
        return slow;
        
    }
};