using System; using System.IO; using System.Collections.Generic; using System.Globalization; using System.Linq; using System.Text; partial class Solver { static public void Swap(ref T a, ref T b) { T t = a; a = b; b = t; } int[,] copy(int[,] array) { var r = new int[4, 4]; for (int i = 0; i < 4; i++) { for (int j = 0; j < 4; j++) { r[i, j] = array[i, j]; } } return r; } bool match(int[,] a1, int[,] a2) { for (int i = 0; i < 4; i++) { for (int j = 0; j < 4; j++) { if (a1[i, j] != a2[i, j]) return false; } } return true; } public void Run() { var a = new int[4, 4]; var start = new int[4, 4]; for (int i = 0; i < 4; i++) { for (int j = 0; j < 4; j++) { a[i, j] = ni(); start[i, j] = i * 4 + j + 1; if (start[i, j] == 16) start[i, j] = 0; } } bool exist = false; var queue = new Queue(); queue.Enqueue(copy(start)); HashSet memo = new HashSet(); while (queue.Count > 0) { var board = queue.Dequeue(); var key = String.Join(",", board.Cast()); if (memo.Contains(key)) continue; memo.Add(key); if (match(board, a)) { exist = true; } for (int i = 0; i < 4; i++) { for (int j = 0; j < 4; j++) { if (i + 1 < 4) { if ( (board[i, j] == 0 && board[i + 1, j] == start[i + 1, j]) || (board[i, j] == start[i, j] && board[i + 1, j] == 0) ) { var newBoard = copy(board); Swap(ref newBoard[i, j], ref newBoard[i + 1, j]); queue.Enqueue(newBoard); } } if (j + 1 < 4) { if ( (board[i, j] == 0 && board[i, j + 1] == start[i, j + 1]) || (board[i, j] == start[i, j] && board[i, j + 1] == 0) ) { var newBoard = copy(board); Swap(ref newBoard[i, j], ref newBoard[i, j + 1]); queue.Enqueue(newBoard); } } } } } cout.WriteLine(exist ? "Yes" : "No"); } } // PREWRITEN CODE BEGINS FROM HERE partial class Solver : Scanner { public static void Main(string[] args) { new Solver(Console.In, Console.Out).Run(); } TextReader cin; TextWriter cout; public Solver(TextReader reader, TextWriter writer) : base(reader) { this.cin = reader; this.cout = writer; } public Solver(string input, TextWriter writer) : this(new StringReader(input), writer) { } public int ni() { return NextInt(); } public int[] ni(int n) { return NextIntArray(n); } public long nl() { return NextLong(); } public long[] nl(int n) { return NextLongArray(n); } public double nd() { return NextDouble(); } public string ns() { return Next(); } public string[] ns(int n) { return NextArray(n); } } public class Scanner { private TextReader Reader; private Queue TokenQueue = new Queue(); private CultureInfo ci = CultureInfo.InvariantCulture; public Scanner() : this(Console.In) { } public Scanner(TextReader reader) { this.Reader = reader; } public int NextInt() { return Int32.Parse(Next(), ci); } public long NextLong() { return Int64.Parse(Next(), ci); } public double NextDouble() { return double.Parse(Next(), ci); } public string[] NextArray(int size) { var array = new string[size]; for (int i = 0; i < size; i++) array[i] = Next(); return array; } public int[] NextIntArray(int size) { var array = new int[size]; for (int i = 0; i < size; i++) array[i] = NextInt(); return array; } public long[] NextLongArray(int size) { var array = new long[size]; for (int i = 0; i < size; i++) array[i] = NextLong(); return array; } public String Next() { if (TokenQueue.Count == 0) { if (!StockTokens()) throw new InvalidOperationException(); } return TokenQueue.Dequeue(); } public bool HasNext() { if (TokenQueue.Count > 0) return true; return StockTokens(); } private bool StockTokens() { while (true) { var line = Reader.ReadLine(); if (line == null) return false; var tokens = line.Trim().Split(" ".ToCharArray(), StringSplitOptions.RemoveEmptyEntries); if (tokens.Length == 0) continue; foreach (var token in tokens) TokenQueue.Enqueue(token); return true; } } }