#include<bits/stdc++.h>
using namespace std;
long long a,b;
char ch;

int main()
{
    scanf("%lld %c %lld",&a,&ch,&b);
    if(ch=='+')
    {
        printf("%lld\n",a+b);
    }
    else
    {
        printf("%lld\n",a-b);
    }
    return 0;
}
