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