Package g1201_1300.s1275_find_winner_on_a_tic_tac_toe_game

Class Solution

  • All Implemented Interfaces:
    
public final class Solution

    1275 - Find Winner on a Tic Tac Toe Game.

    Easy

    Tic-tac-toe is played by two players A and B on a 3 x 3 grid. The rules of Tic-Tac-Toe are:

    • Players take turns placing characters into empty squares ' '.

    • The first player A always places 'X' characters, while the second player B always places 'O' characters.

    • 'X' and 'O' characters are always placed into empty squares, never on filled ones.

    • The game ends when there are three of the same (non-empty) character filling any row, column, or diagonal.

    • The game also ends if all squares are non-empty.

    • No more moves can be played if the game is over.

    Given a 2D integer array moves where <code>movesi = row<sub>i</sub>, col<sub>i</sub></code> indicates that the <code>i<sup>th</sup></code> move will be played on <code>gridcol<sub>i</sub></code>. return the winner of the game if it exists (A or B). In case the game ends in a draw return "Draw". If there are still movements to play return "Pending".

    You can assume that moves is valid (i.e., it follows the rules of Tic-Tac-Toe ), the grid is initially empty, and A will play first.

    Example 1:

    Input: moves = [0,0,2,0,1,1,2,1,2,2]

    Output: "A"

    Explanation: A wins, they always play first.

    Example 2:

    Input: moves = [0,0,1,1,0,1,0,2,1,0,2,0]

    Output: "B"

    Explanation: B wins.

    Example 3:

    Input: moves = [0,0,1,1,2,0,1,0,1,2,2,1,0,1,0,2,2,2]

    Output: "Draw"

    Explanation: The game ends in a draw since there are no moves to make.

    Constraints:

    • 1 &lt;= moves.length &lt;= 9

    • moves[i].length == 2

    • <code>0 <= row<sub>i</sub>, col<sub>i</sub><= 2</code>

    • There are no repeated elements on moves.

    • moves follow the rules of tic tac toe.

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description

    • Field Summary

      Fields 
      Modifier and Type Field Description

    • Constructor Summary

      Constructors 
      Constructor Description
      Solution()

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description

    • Method Summary

      Modifier and Type Method Description
      final String tictactoe(Array<IntArray> moves)

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait