题目描述

blablabla

样例

blablabla

C++ 代码

#include<cstdio>
#include<iostream>
#include<string.h>
#include<vector>
#include<algorithm>
using namespace std;
int n=0,mins=0;
vector<string> vec;
void fun(string &s){
    string last;
    for (int i = 1; i <= mins; ++i) {
        string tmp=vec.at(0).substr(vec.at(0).length()-i,vec.at(0).length());;
        for (int j = 1; j < vec.size(); ++j) {
            string  tmp1=vec.at(j).substr(vec.at(j).length()-i,vec.at(j).length());
            if(tmp!=tmp1)
            {
                i==1?s="":s=last;
                return;
            }
        }
       last=tmp; 
    }
    s=last;
}

int main(){
    while(cin>>n&&n!=0){
        vec.clear();
        mins=0x3f3f3f;
        for (int i = 0; i < n; ++i) {
            string str;
            cin>>str;
            mins=min(mins,(int)str.length());
            vec.push_back(str);
        }
        string s;
        fun(s);
        cout<<s<<endl;
    }
    return 0;
}