标签:
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:
思路:bubble sort的想法,看这个数是不是0,是的话就后移。O(n^2)。
public class Solution { public void moveZeroes(int[] nums) { for(int i=nums.length-1;i>=0;i--) { for(int j=0;j<nums.length-1;j++) { if(nums[j]==0) { swap(nums,j,j+1); } } } } public void swap(int[]nums,int i,int j) { int tmp=nums[i]; nums[i]=nums[j]; nums[j]=tmp; } }
Solution2:
思路:双指针,用index指针存不是零的数。最后再从已有的array后面往后加0.
public class Solution { public void moveZeroes(int[] nums) { int index=0; for(int i=0;i<nums.length;i++) { if(nums[i]!=0) { nums[index++]=nums[i]; } } for(int i=index;i<nums.length;i++) { nums[i]=0; } } }
标签:
原文地址:http://www.cnblogs.com/Machelsky/p/5860895.html