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[LeetCode]: 283: Move Zeroes

时间:2015-09-21 22:32:06      阅读:2101      评论:0      收藏:0      [点我收藏+]

题目:

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.

分析:从后向前逐一查找即可

代码:

public class Solution {
    public static void moveZeroes(int[] nums) {
        for(int i =nums.length-1; i >=0 ;i--){
            if(nums[i] ==0){
                int intTemp = 0;
                for(int j=i+1;j<nums.length;j++){
                    if(nums[j]!= 0){
                        nums[j-1] = nums[j];
                        nums[j] = 0;
                    }
                }
            }
        }
    }
}

 

网上高手的思路:现将非0的数前移,再将余下的空位补0

代码:

public class Solution {
    public static void moveZeroes(int[] nums) {
        int iCounter = 0;
        for(int i =0;i<nums.length;i++){
            if(nums[i] ==0){
                iCounter++;
            }
            else{
                nums[i-iCounter] = nums[i];
            }
        }
        
        for(int i = (nums.length-iCounter);i<nums.length;i++){
            nums[i]=0;
        }
    }
}

 

[LeetCode]: 283: Move Zeroes

原文:http://www.cnblogs.com/savageclc26/p/4827489.html

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