#include<stdio.h>
int main()
{
    long long int a,b,v;
    char op;
    scanf("%lld %c %lld",&a,&op,&b);
    if(op=='+')
    {
        v=a+b;
        printf("%lld\n",v);
    }
    else if(op=='-')
    {
        v=a-b;
        printf("%lld\n",v);
    }
    return 0;
}
