UVa：621 - Secret Research

好水……本以为会是道细节题……还有这明明是字符串题，汝之书为何归类到了数学基础题里……

#include<iostream>
#include<string>
using namespace std;

int main(){
    int n;
    while(cin >> n) {
        string s;
        while(n--) {
            cin >> s;
            int length = s.length();
            if(s == "1" || s == "4" || s == "78")
                cout << "+" << endl;
            else if(s[length-2] == '3' && s[length-1] == '5')
                cout << "-" << endl;
            else if(s[0] == '9' && s[length-1] == '4')
                cout << "*" << endl;
            else if(s[0] == '1' && s[1] == '9' && s[2] == '0')
                cout << "?" << endl;
        }
    }
    return 0;
}

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          Keep It Simple,Stupid!

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