#include <iostream> using namespace std; int main() { int a, b; char op; cin >> a >> op >> b; long long result; switch(op) { case '+': result = (long long)a + b; break; case '-': result = (long long)a - b; break; case '*': result = (long long)a * b; break; case '/': result = (long long)a / b; break; default: return 1; } cout << result << endl; return 0; }