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