import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String xopy = sc.next();
        int z = ind(xopy);
        int x = Integer.parseInt( xopy.substring(0,z) );
        int y = Integer.parseInt( xopy.substring(z+1) );
        String op = xopy.substring(z,z+1);
        int r =0;
        if( op.equals("+") ){
            r = x-y;
        }else{
            r = x+y;
        }
        System.out.println(r);
    }
    static int ind(String S){
        int n = S.indexOf("+");
        if(n<=0){
            n=Integer.MAX_VALUE;
        }
        int m = S.indexOf("-");
        if(m<=0){
            m=Integer.MAX_VALUE;
        }
        return Math.min(n,m);
    }
}