#include<stdio.h>
int main()
{
    long long int a,b,c;
    char op;

    scanf("%lld %c %lld",&a,&op,&b);
    if(op=='+')
    {
        c=a+b;
    }
    if(op=='-')
    {
        c=a-b;
    }
    printf("%lld",c);
    return 0;
}
