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