hdu-5924-Mr. Frog’s Problem

题目链接

思路：  用string输入  （水题）

#include<iostream>#include<cstdio>#include<string>using namespace std;int main(){    int T,t=0;    scanf("%d",&T);    while(T--){        string a,b;        cin>>a>>b;        printf("Case #%d:\n",++t);        if(a==b){            cout<<1<<endl;            cout<<a<<" "<<b<<endl;        }        else{            cout<<2<<endl;            cout<<a<<" "<<b<<endl;            cout<<b<<" "<<a<<endl;        }    }    return 0;}