Aizu Online Judge 0176 What Color?

■0176 What Color?

やるだけ．

import java.util.*;
import java.lang.*;
import java.math.*;
import java.io.*;

import static java.lang.Math.*;
import static java.util.Arrays.*;

public class Main{

 Scanner sc=new Scanner(System.in);

 int INF=1<<28;
 double EPS=1e-9;

 void run(){
  for(;;){
   String s=sc.next();
   if(s.equals("0")){
    break;
   }
   int r=Integer.parseInt(s.substring(1, 3), 16);
   int g=Integer.parseInt(s.substring(3, 5), 16);
   int b=Integer.parseInt(s.substring(5, 7), 16);
   int k=-1;
   double min=INF;
   for(int i=0; i<8; i++){
    int dr=r-(i/4)*0xff;
    int dg=g-((i/2)%2)*0xff;
    int db=b-(i%2)*0xff;
    double d=Math.sqrt(dr*dr+dg*dg+db*db);
    if(d+EPS<min){
     k=i;
     min=d;
    }
   }
   println(new String[]{"black", "blue", "lime", "aqua", "red",
     "fuchsia", "yellow", "white",}[k]);
  }
 }

 void debug(Object... os){
  System.err.println(Arrays.deepToString(os));
 }

 void print(String s){
  System.out.print(s);
 }

 void println(String s){
  System.out.println(s);
 }

 public static void main(String[] args){
  // System.setOut(new PrintStream(new BufferedOutputStream(System.out)));
  new Main().run();
 }
}