#include<iostream>
using namespace std;
int main(){
	int n;
	cin>>n;
	if(n>=100 and n<=999){
		cout<<"Y";
	}else{
		cout<<"N";
	}
	return 0;
}

#include<iostream>
using namespace std;
int main(){
	int n;
	cin>>n;
	if(n>=100 and n<=999){
		cout<<"Y";
	}else{
		cout<<"N";
	}
	return 0;
}