#include <iostream>

using namespace std;
int main()
{
	int prvibr, drugibr = 0;
	int index1 = 0;
	char op;
	char racun[30] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
	char temp[10] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
	cin >> racun;


	for (int i = 0; i < 31; i++){


		if ((racun[i] == 42) || (racun[i] == 43) || (racun[i] == 45) || (racun[i] == 47))
		{
			index1 = i;
			op = racun[i];
		}


	}


	prvibr = atoi(racun);



	do {
		temp[i] = racun[index1 + i];
	} (while racun[index1+i] == 0)

	drugibr = atoi(temp);




	switch (op) {
	case 43:
		cout << prvibr + drugibr << endl;
		break;
	case 45:
		cout << prvibr - drugibr << endl;
		break;
	case 42:
		cout << prvibr * drugibr << endl;
		break;
	case 47:
		cout << prvibr / drugibr << endl;
		break;
	default:
		cout << "greska" << endl;
		break;

	}


		system("pause");
		return 0;
	}