题解

#include<bits/stdc++.h>
using namespace std;
int main(){
	int n;
	cin >> n;
	if(n < 1200) cout << "grey";
	else if(n < 1400) cout << "green";
	else if(n < 1600) cout << "cyan";
	else if(n < 1900) cout << "blue";
	else if(n < 2100) cout << "purple";
	else if(n < 2400) cout << "orange";
	else if(n < 3000) cout << "red";
	else cout << "red-black";
	return 0;
}