#include<cstdio>
int main()
{
	int a,d;
	char s;
	scanf("%d %c %d",&a,&s,&d);
	if(s=='+'){
		printf("%d",a+d);
	}else if(s=='-'){
		printf("%d",a-d);
	}else if(s=='*'&&d==0||s=='/'&&d==0){
		printf("Divided by zero!");
	}else if(s=='*'){
		printf("%d",a*d);
	}else if(s=='/'){
		printf("%d",a/d);
	}else if(s!='+'&&s!='-'&&s!='*'&&s!='/'){
		printf("Invalid operator!");
	}
	return 0;
 }