#include<stdio.h>
int main()
{
char ch;
int a,b;
scanf("%c",&ch);
scanf("%d%d",&a,&b);
switch(ch)
{
case '+':printf("%d",a+b);
break;
case '-':printf("%d",a-b);
break;
case '*':printf("%d",a*b);
break;
case '/':printf("%d",a/b);
break;
default:printf("Invalid operator");
}
printf("\n");
return 0;
}