class Solution {
public:
    void moveZeroes(vector<int>& nums) {
        int number = 0;
        int length = nums.size();
        for(int i = 0; i < length; i++) {
            if (nums[i]) {
                nums[number ++] = nums[i];
            }
        }    
        for (int i = 0; i < length - number; i++) {
            nums[number + i] = 0;    
        }
    }
};