摘要:#include <iostream>
#include <string>
#include <cstdio>
#include <algorithm>
using namespace std;
const int maxn=55;
string f[maxn];
int n;
bool cmp(string a,string b)
{ return a+b>b+a;
}
int main()
{ while(cin>>n&&n) { for(int i=0;i<n;i++) cin>>f[i]
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