Tic-tac-toe is played by two players A and B on a 3 x 3 grid. The rules of Tic-Tac-Toe are:
' '.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.Given a 2D integer array moves where moves[i] = [rowi, coli] indicates that the ith move will be played on grid[rowi][coli]. 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.
\n
Example 1:
\n![\"\"](\"https://assets.leetcode.com/uploads/2021/09/22/xo1-grid.jpg\")
\n\nInput: moves = [[0,0],[2,0],[1,1],[2,1],[2,2]]\nOutput: "A"\nExplanation: A wins, they always play first.\n\n\n
Example 2:
\n![\"\"](\"https://assets.leetcode.com/uploads/2021/09/22/xo2-grid.jpg\")
\n\nInput: moves = [[0,0],[1,1],[0,1],[0,2],[1,0],[2,0]]\nOutput: "B"\nExplanation: B wins.\n\n\n
Example 3:
\n![\"\"](\"https://assets.leetcode.com/uploads/2021/09/22/xo3-grid.jpg\")
\n\nInput: moves = [[0,0],[1,1],[2,0],[1,0],[1,2],[2,1],[0,1],[0,2],[2,2]]\nOutput: "Draw"\nExplanation: The game ends in a draw since there are no moves to make.\n\n\n
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Constraints:
\n\n1 <= moves.length <= 9moves[i].length == 20 <= rowi, coli <= 2moves.moves follow the rules of tic tac toe.A 和 B 在一个 3 x 3 的网格上玩井字棋。
\n\n井字棋游戏的规则如下：
\n\n给你一个数组 moves，其中每个元素是大小为 2 的另一个数组（元素分别对应网格的行和列），它按照 A 和 B 的行动顺序（先 A 后 B）记录了两人各自的棋子位置。
如果游戏存在获胜者（A 或 B），就返回该游戏的获胜者；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你可以假设 moves 都 有效（遵循井字棋规则），网格最初是空的，A 将先行动。
\n\n
示例 1：
\n\n输入：moves = [[0,0],[2,0],[1,1],[2,1],[2,2]]\n输出："A"\n解释："A" 获胜，他总是先走。\n"X " "X " "X " "X " "X "\n" " -> " " -> " X " -> " X " -> " X "\n" " "O " "O " "OO " "OOX"\n\n\n
示例 2：
\n\n输入：moves = [[0,0],[1,1],[0,1],[0,2],[1,0],[2,0]]\n输出："B"\n解释："B" 获胜。\n"X " "X " "XX " "XXO" "XXO" "XXO"\n" " -> " O " -> " O " -> " O " -> "XO " -> "XO " \n" " " " " " " " " " "O "\n\n\n
示例 3：
\n\n输入：moves = [[0,0],[1,1],[2,0],[1,0],[1,2],[2,1],[0,1],[0,2],[2,2]]\n输出："Draw"\n输出：由于没有办法再行动，游戏以平局结束。\n"XXO"\n"OOX"\n"XOX"\n\n\n
示例 4：
\n\n输入：moves = [[0,0],[1,1]]\n输出："Pending"\n解释：游戏还没有结束。\n"X "\n" O "\n" "\n\n\n
\n\n
提示：
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collections<\\/a>\\u3002\\u5982\\u679c\\u60a8\\u9700\\u8981\\u4f7f\\u7528\\u5176\\u4ed6\\u5e93\\u51fd\\u6570\\uff0c\\u8bf7\\u81ea\\u884c\\u5bfc\\u5165\\u3002<\\/p>\\r\\n\\r\\n \\u6ce8\\u610f Python 2.7 \\u5c06\\u57282020\\u5e74\\u540e\\u4e0d\\u518d\\u7ef4\\u62a4<\\/a>\\u3002 \\u5982\\u60f3\\u4f7f\\u7528\\u6700\\u65b0\\u7248\\u7684Python\\uff0c\\u8bf7\\u9009\\u62e9Python 3\\u3002<\\/p>\"],\"c\":[\"C\",\" \\u7248\\u672c\\uff1a \\u7f16\\u8bd1\\u65f6\\uff0c\\u5c06\\u4f1a\\u91c7\\u7528 \\u4e3a\\u4e86\\u4f7f\\u7528\\u65b9\\u4fbf\\uff0c\\u5927\\u90e8\\u5206\\u6807\\u51c6\\u5e93\\u7684\\u5934\\u6587\\u4ef6\\u5df2\\u7ecf\\u88ab\\u81ea\\u52a8\\u5bfc\\u5165\\u3002<\\/p>\\r\\n\\r\\n \\u5982\\u60f3\\u4f7f\\u7528\\u54c8\\u5e0c\\u8868\\u8fd0\\u7b97, \\u60a8\\u53ef\\u4ee5\\u4f7f\\u7528 uthash<\\/a>\\u3002 \\\"uthash.h\\\"\\u5df2\\u7ecf\\u9ed8\\u8ba4\\u88ab\\u5bfc\\u5165\\u3002\\u8bf7\\u770b\\u5982\\u4e0b\\u793a\\u4f8b:<\\/p>\\r\\n\\r\\n 1. 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