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