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

}
