文章出處
Given an array withnobjects 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.
Note:
You are not suppose to use the library's sort function for this problem.
排序，然而不給用排序，
鑒于數值只有三個0，1，2，所以可以直接統計出現次數，最后直接塞進去就行了
class Solution {public: void sortColors(vector& nums) { int a[3]={0}; for(int i=0;i
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