package no222;

import java.util.Scanner;

public class Main {

	static char[] s;
	static int ind = 0;
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		s = sc.next().toCharArray();
		int a = number();
		char op = s[ind++];
		int b = number();
		if (op == '+') {
			System.out.println(a-b);
		}else{
			System.out.println(a+b);
		}
	}

	public static int number() {
		boolean negative = false;
		if (s[ind] == '+') {
			ind++;
		}else if(s[ind] == '-') {
			ind++;
			negative = true;
		}
		int n = 0;
		while(ind < s.length && Character.isDigit(s[ind])) {
			n = n * 10 + s[ind] - '0';
			ind++;
		}
		return negative ? -n : n;
	}

}