#include <iostream>
#include <string>
using namespace std;
int main() {
int a, b;
char op;
cin >> a >> op >> b;

if (op != '+' && op != '-' && op != '*' && op != '/') { cout << "NO" << endl; return 0; }

if (op == '/' && b == 0) { cout << "NO" << endl; return 0; }

int result; switch (op) { case '+': result = a + b; break; case '-': result = a - b; break; case '*': result = a * b; break; case '/': result = a / b;

if (a % b != 0) {
        cout << "~" << result << endl;
        return 0;
    }
    break;

}

cout << result << endl; return 0;

}