27_RemoveElement - a920604a/leetcode GitHub Wiki

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