public class L283_MoveZeroes {
    public static void moveZeroes(int[] nums) {
        for (int i = 0; i < nums.length; i++) {
            for (int j = 0; j < nums.length - 1; j++) {
                if (nums[j] == 0 && nums[j + 1] != 0) {
                    nums[j] = nums[j + 1];
                    nums[j + 1] = 0;
                }
            }
        }
        System.out.println(Arrays.toString(nums));
    }

    public static void main(String[] args) {
        int[] nums = { 0, 1, 0, 3, 12 };
        // int[] nums = { 0 };
        moveZeroes(nums);
    }

}

class Solution:
    def moveZeroes(self, nums):
        """
        :type nums: List[int]
        :rtype: void Do not return anything, modify nums in-place instead.
        """
        n = len(nums)
        i = -1
        j = 0
        # nums[0....i]表示非0元素的数列,初始值i=-1
        while j <= n-1:
            if nums[j] != 0:
                i += 1
                nums[i] = nums[j]
            j += 1
        for k in range(i+1, n):
            nums[k] = 0