1003. 猜数游戏（c++）

#include <iostream>
using namespace std;
int main()
{
	int a,aa;
    cin>>a;
	if(a>=100 && a<=999){
		aa=a*1000+a;
        cout<<aa/7/11/13<<endl;
	}else{
		cout<<"please input a number between 100 and 999"<<endl;
    }
    
    return 0;
}