
#include <iostream>
#include <stdio.h>
using namespace std;
int main(){
  int a,b;
 char op;
 sacanf("%d",a);
sacanf("%c",op);
sacanf("%d",b);
 if(op=='+')
 cout<<a+b<<"\n";
else
 cout<<a-b<<"\n";
return 0;}
