Problem255A.java

package CodeForces;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.StringTokenizer;



public class Problem255A
{
	public static void main(String[] args) throws IOException
	{
		fastinput.init(System.in);
		int n = fastinput.nextInt();
		int chest = 0;
		int biceps = 0;
		int back = 0;
		for (int i = 0; i < n; i++)
		{
			int nextex = fastinput.nextInt();
			if (i % 3 == 0)
			{
				chest += nextex;
			}
			else if (i % 3 == 1)
			{
				biceps += nextex;
			}
			else
			{
				back += nextex;
			}
		}
		if (chest > biceps && chest > back)
		{
			System.out.println("chest");
		}
		else if (biceps > chest && biceps > back)
		{
			System.out.println("biceps");
		}
		else if (back > chest && back > biceps)
		{
			System.out.println("back");
		}
		else
		{}
	}
	
	public static class fastinput
	{
		static BufferedReader bf;
		static StringTokenizer st;
		
		static void init(InputStream input)
		{
			bf = new BufferedReader(new InputStreamReader(input));
			st = new StringTokenizer("");
		}
		
		static String nextline() throws IOException
		{
			return bf.readLine();
		}
		
		static String next() throws IOException
		{
			while (!st.hasMoreTokens())
			{
				st = new StringTokenizer(bf.readLine());
			}
			return st.nextToken();
		}
		
		static int nextInt() throws IOException
		{
			return Integer.parseInt(next());
		}
	}
}