uva Children's Game

非常巧妙的题目，巧用cmp，注意cmp的重载

#include <iostream>#include <algorithm>using namespace std;string a[55];bool cmp(string a, string b){    return a+b > b+a;}int main(int argc, char const *argv[]){    int n;    while(cin >> n && n){      for(int i = 0; i < n; i++)        cin >> a[i];      sort(a,a+n,cmp);      for(int i = 0; i < n; i++)        cout << a[i];      cout << endl;    }    return 0;}