GCJ2010 Qualification Round A "Snapper Chain "

問題：http://code.google.com/codejam/contest/dashboard?c=433101#s=p0

import java.io.File;
import java.io.PrintWriter;
import java.util.Scanner;

public class SnapperChain {
	public static void main(String[] args) throws Exception {
		String filename = "A-large";
		Scanner scan = new Scanner(new File(filename+".in"));;
		PrintWriter out = new PrintWriter(new File(filename+".out"));
		
		for(int i=0, t = scan.nextInt();++i<=t;){
			int n = scan.nextInt();
			int k = scan.nextInt();
			out.printf("Case #%d: %s\n",i,(k+1)%(1<<n)==0?"ON":"OFF");
		}
		out.flush();
	}
}