#include <bits/stdc++.h>

using namespace std;

int main() {
    int num1, num2;
    char op;
    cin >> num1 >> num2 >> op;

    switch (op) {
        case '+':
            cout << num1 + num2 << endl;
            break;
        case '-':
            cout << num1 - num2 << endl;
            break;
        case '*':
            cout << num1 * num2 << endl;
            break;
        case '/':
            if (num2 == 0) cout << "Divided by zero!" << endl;
            else cout << num1 / num2 << endl;
            break;
        default:
            cout << "Invalid operator!" << endl;
            break;
    }
    return 0;
}