import java.util.Scanner;

public class Main {
	
	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		System.out.print("nomer?");
		int n1 = scanner.nextInt();
		
		System.out.print("nomer??");
		int n2 = scanner.nextInt();
		
		int n3;
		
		System.out.print("znak?");
		String action = scanner.nextLine();
		action = scanner.nextLine();
		
		switch(action){
			case "+":
			n3 = n1+n2;
			System.out.print(n3);
			break;
		case "-":
			n3 = n1-n2;
			System.out.print(n3);
			break;
		case "*":
			n3 = n1*n2;
			System.out.print(n3);
			break;
		case "/":
			n3 = n1/n2;
			System.out.print(n3);
			break;
		}
		
		
	}
}