import java.util.*; public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); String get = sc.next(); int count = 0; for (int i = 1; i < get.length(); i++) { if (! Character.isDigit(get.charAt(i))) { count = i; break; } } int a = Integer.parseInt(get.substring(0, count)); int b = Integer.parseInt(get.substring(count + 1, get.length())); char op = get.charAt(count); int ans; if (op == '+') { ans = a + b; } else { ans = a - b; } System.out.println(ans); } }