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

        if(ch=='/')
            {
        printf("%d\n",a-b);
        }


}
