Oh Those Palindromes

https://vjudge.net/problem/CodeForces-1064C
这是一个让我窒息的题目
窒息
窒息
窒息

#include <iostream>
#include <algorithm>
using namespace std;
char shu[100005];
int main()
{
    int a;
    while(cin>>a)
    {
        cin>>shu;
        sort(shu,shu+a);
        cout<<shu<<endl;
    }
    return 0;
}