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