#include <iostream>
#include <fstream>
#include <string>
using namespace std;

int main(int argc, char * argv[]){
	ifstream in(argv[1]);
	string opd1;
	string opr;
	string opd2;
	std::getline(in, opd1, ' ');
	std::getline(in, opr, ' ');
	std::getline(in, opd2, ' ');
	int opd1int = atoi(opd1.c_str());
	int opd2int = atoi(opd2.c_str());

	if (opr == "*"){
		cout << opd1int * opd2int << "\n";
	} else if (opr == "/"){
		if (opd2int == 0){
			cerr << "divide by 0\n";
		} else {
			cout << opd1int / opd2int << "\n";
		}
	} else if (opr == "-"){
		cout << opd1int - opd2int << "\n";
	} else if (opr == "+"){
		cout << opd1int + opd2int << "\n";
	} else {
		cerr << "bad opr " << opr << "\n";
	}
}