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