#include<stdio.h>
int main()
{
	long a,b,sum;
	char op;
	scanf("%ld",&a);
	scanf(" %c",&op);
	scanf(" %ld",&b);
	switch(op)
	{
		case '+':printf("%ld\n",a+b);break;
		case '-':printf("%ld\n",a-b);break;
		default:break;
	}
	return 0;
}