uva 621 - Secret Research

水题不多说

#include<iostream>
#include<string>
#include<stdio.h>
using namespace std;
int main(){
    int n;
    cin>>n;
    getchar();
    while(n--){
        string l;
        getline(cin,l);
        if(l=="1"||l=="4"||l=="78"){
            cout<<"+"<<endl;
        }
        else if(l[l.size()-1]=='5'&&l[l.size()-2]=='3')
            cout<<"-"<<endl;
        else if(l[0]=='9'&&l[l.size()-1]=='4')
            cout<<"*"<<endl;
        else if(l[0]=='1'&&l[1]=='9'&&l[2]=='0')
            cout<<"?"<<endl;

    }
}