Design an algorithm to figure out if someone has won a game of tic-tac-toe. Input is a string array of size N x N, including characters " ", "X" and "O", where " " represents a empty grid.
\r\n\r\nThe rules of tic-tac-toe are as follows:
\r\n\r\nIf there is any winner, return the character that the winner used. If there's a draw, return "Draw". If the game doesn't end and there is no winner, return "Pending".
\r\n\r\nExample 1:
\r\n\r\n\r\nInput: board = ["O X"," XO","X O"]\r\nOutput: "X"\r\n\r\n\r\n
Example 2:
\r\n\r\n\r\nInput: board = ["OOX","XXO","OXO"]\r\nOutput: "Draw"\r\nExplanation: no player wins and no empty grid left\r\n\r\n\r\n
Example 3:
\r\n\r\n\r\nInput: board = ["OOX","XXO","OX "]\r\nOutput: "Pending"\r\nExplanation: no player wins but there is still a empty grid\r\n\r\n\r\n
Note:
\r\n\r\n1 <= board.length == board[i].length <= 100设计一个算法，判断玩家是否赢了井字游戏。输入是一个 N x N 的数组棋盘，由字符" "，"X"和"O"组成，其中字符" "代表一个空位。
\n\n以下是井字游戏的规则：
\n\n如果游戏存在获胜者，就返回该游戏的获胜者使用的字符（"X"或"O"）；如果游戏以平局结束，则返回 "Draw"；如果仍会有行动（游戏未结束），则返回 "Pending"。
\n\n示例 1：
\n\n输入： board = ["O X"," XO","X O"]\n输出： "X"\n\n\n
示例 2：
\n\n输入： board = ["OOX","XXO","OXO"]\n输出： "Draw"\n解释： 没有玩家获胜且不存在空位\n\n\n
示例 3：
\n\n输入： board = ["OOX","XXO","OX "]\n输出： "Pending"\n解释： 没有玩家获胜且仍存在空位\n\n\n
提示：
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