#include <iostream> using namespace std; int main() { int a, b; char op; cin >> a >> b >> op; switch (op) { case '+': cout << a + b << endl; break; case '-': cout << a - b << endl; break; case '*': cout << a * b << endl; break; case '/': if (b == 0) cout << "Divided by zero!" << endl; else cout << a / b << endl; break; default: cout << "Invalid operator!" << endl; } return 0; }