#include <bits/stdc++.h>
using namespace std;
int main(){
   int a=0,b=0,ans=0;
   char op;
   scanf("%d%d %c",&a,&b,&op);
   if(op=='+'){
     ans=a+b;
     printf("%d",ans);
   } 
   if(op=='-'){
   ans=a-b; 
     printf("%d",ans);
}
}