#include <iostream>
#include "operaciones.h"

using std::cin;
using std::cout;
using std::endl;

int main(void) {
    int val1, val2, res;
    char oper;
    cin >> val1 >> oper >> val2;
    switch (oper) {
        case '+':
            res = suma(val1, val2);
            break;
        case '-':
            res = resta(val1, val2);
            break;
        case '*':
            res = multiplica(val1, val2);
            break;
        case '/':
            res = divide(val1, val2);
            break;
        default:
            return -1;
    }
    cout << res << endl;
    return 0;
}