题解

#include<bits/stdc++.h>
using namespace std;
int main(){
    int n;
    cin>>n;
    if(n>=622&&n<=770) cout<<"red";
    else if(n>=597&&n<=621) cout<<"orange";
    else if(n>=577&&n<=596) cout<<"yellow";
    else if(n>=492&&n<=576) cout<<"green";
    else if(n>=455&&n<=491) cout<<"blue";
    else cout<<"purple";
    return 0;
}