Leetcode 27 - Remove Element

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