Leetcode 之Sort Colors
Sort Colors
Given an array with n objects colored red, white or blue, sort them so that objects of the same color are adjacent, with the colors in the order red, white and blue.
Here, we will use the integers 0, 1, and 2 to represent the color red, white, and blue respectively.
相当于012的排序,但是不同的是,这种排序可以通过统计012的个数再还原排序后的数列,懒得写其他的排序方式了,插入排序应该也可行。
class Solution { public: void sortColors(vector<int>& nums) { int red=0,white=0,blue=0; int i=0; for(i=0;i<nums.size();i++) { if(nums[i]==0) red++; else if(nums[i]==1) white++; else blue++; } for(i=0;i<red;i++) nums[i]=0; for(;i<white+red;i++) nums[i]=1; for(;i<nums.size();i++) nums[i]=2; } };
我去再找找有没有简单的办法。