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

return 0;
}

