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