yao2030

public class Square
{
    public static void drawSquare(int N, double x, double y, double r)
    {
	if(N == 0)
	    return;
	StdDraw.square(x, y, r);
	StdDraw.show(100);
	drawSquare(N-1, x - r , y + r, r/2.2);
	drawSquare(N-1, x + r , y + r, r/2.2);

yao2030

public class Combination
{
    public static void combinate(String prefix, String s)
    {
	StdOut.println(prefix);
	int N = s.length();
	if (N == 0) return;
	
	for (int i = 0; i < N; i++)
	    combinate(prefix + s.charAt(i), s.substring(i+1, N));

yao2030

public class Permutation
{
    public static void perm1(String s) { perm1("", s); }
    public static void perm1(String prefix, String s)
    {
	int N = s.length();
	if (N == 0) System.out.println(prefix);
	else
	    {
		for(int i = 0; i < N; i++)

yao2030

public class BP
{
    public static String binary(int N)
    {
	if(N / 2 == 0) return "" + N;
	return binary(N/2) + "" + N % 2;
    }
    public static void main(String[] args)
    {
	int N = Integer.parseInt(args[0]);

yao2030

public class Ruler
{
    public static String ruler(int N)
    {
	if (N <= 0) return "";
	if (N == 1) return "1";
	return ruler(N-1) + N + ruler(N-1);
    }
   
    public static void drawRuler(String a)

yao2030

public class Post
{
    public static void halfHeight(double i)
    {
	StdDraw.setPenRadius(.01);
	StdDraw.line(i, 0, i, 1);
    }
    public static void fullHeight(double i)
    {
	StdDraw.setPenRadius(0.01);

yao2030

public class Mine
{
    public static void main(String[] args)
    {
	int M = Integer.parseInt(args[0]);
	int N = Integer.parseInt(args[1]);
	double p = Double.parseDouble(args[2]);
	boolean[][] mine = new boolean[M+2][M+2];
	for(int i = 1; i <= M; i++)

yao2030

public class Calendar
{
    public static boolean isLeapYear(int year)
    {
	if((year % 4 ==0 && year % 100 != 0) || (year % 400 == 0))
	    return true;
	return false;
    }
    public static String getMonth(int month)
    {

yao2030

public class Hadamard
{
    public static void main(String[] args)
    {
	int N = Integer.parseInt(args[0]);
	boolean[][] H = new boolean[N][N];
	H[0][0] = true;
	for(int n = 1; n < N; n += n)
	    {
		for(int i = 0; i < n; i++)

yao2030

public class Kary
{
    public static void main(String[] args)
    {
	int i = Integer.parseInt(args[0]);
	int k = Integer.parseInt(args[1]);
	int v = 1;
	while (v <= i/k)
	    v *= k;
	int n = i;