心得

將數字陣列中為零的數字在不更動其他數字排序的情況下移至陣列最後方，這題要求必須使用原陣列不能new一個新的物件就比較麻煩一點點了。

問題

Given an array nums, write a function to move all 0‘s to the end of it while maintaining the relative order of the non-zero elements.

For example, given nums = [0, 1, 0, 3, 12], after calling your function, nums should be [1, 3, 12, 0, 0].

Note:

1. You must do this in-place without making a copy of the array.
2. Minimize the total number of operations.

答案

public class Solution {
    public void MoveZeroes(int[] nums) {
        int j = 0;
        for(int i = 0; i < nums.Length; i++){
            if(nums[i] != 0){
                nums[j] = nums[i];
                j++;
            }
        }
        
        for(int i = j; i < nums.Length; i++){
            nums[i] = 0;
        }
    }
}