#include<bits/stdc++.h>
using namespace std;
map<int,int>q;
int A,B;
char s;
int main()
{
    scanf("%d%c%d",&A,&s,&B);
    if(s=='+')
    {
        printf("%d\n",A+B);
    }
    else
    {
         printf("%d\n",A-B);
    }
    return 0;
}