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Tic-Tac-Toe Game Over Logic
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Tic-Tac-Toe Game Over Logic

MediumPython

Problem

Implement a function that determines whether a Tic-Tac-Toe game is over.

The input is a 3x3 board represented by a list of lists containing "X", "O", or "." for an empty cell. Return True if either player has three matching symbols in a row, column, or diagonal, or if the board is full; otherwise return False. Assume the board represents a valid game state.

Constraints

  • The board has exactly 3 rows and 3 columns.
  • Each cell is one of "X", "O", or ".".
  • The board represents a valid Tic-Tac-Toe game state.

Function Signature

def is_game_over(board):
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