LeetCode.283.Move Zeroes

原題鏈接：Move Zeroes

題目內容：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:
You must do this in-place without making a copy of the array.
Minimize the total number of operations.

---

C++

class Solution {
public:
    void moveZeroes(vector<int>& nums) {
        int end = 0, start = 0;
        while(start < nums.size()) {
            if(nums[start] != 0) {
                swap(nums[end], nums[start]);
                end++;
            }
            start++;
        }
    }
};

Python

class Solution(object):
    def moveZeroes(self, nums):
        """
        :type nums: List[int]
        :rtype: void Do not return anything, modify nums in-place instead.
        """
        count_z = 0
        cur = 0
        for i in range(0, len(nums)):
            if nums[i] != 0:
                nums[cur] = nums[i]
                cur += 1
            else:
                count_z += 1
        for s in range(cur, len(nums)):
            nums[s] = 0