Class Solution
java.lang.Object
g0701_0800.s0794_valid_tic_tac_toe_state.Solution
public class Solution
extends java.lang.Object
794 - Valid Tic-Tac-Toe State.
Medium
Given a Tic-Tac-Toe board as a string array board
, return true
if and only if it is possible to reach this board position during the course of a valid tic-tac-toe game.
The board is a 3 x 3
array that consists of characters ' '
, 'X'
, and 'O'
. The ' '
character represents an empty square.
Here are the rules of Tic-Tac-Toe:
- Players take turns placing characters into empty squares
' '
. - The first player always places
'X'
characters, while the second player always places'O'
characters. 'X'
and'O'
characters are always placed into empty squares, never 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.
Example 1:
Input: board = ["O “,” “,” "]
Output: false
Explanation: The first player always plays “X”.
Example 2:
Input: board = [“XOX”," X “,” "]
Output: false
Explanation: Players take turns making moves.
Example 3:
Input: board = [“XOX”,“O O”,“XOX”]
Output: true
Constraints:
board.length == 3
board[i].length == 3
board[i][j]
is either'X'
,'O'
, or' '
.
-
Constructor Summary
-
Method Summary
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
-
Constructor Details
-
Solution
public Solution()
-
-
Method Details
-
validTicTacToe
public boolean validTicTacToe(java.lang.String[] board)
-