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模拟卷Leetcode【普通】079. 单词搜索

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079. 单词搜索

给定一个 m x n 二维字符网格 board 和一个字符串单词 word 。如果 word 存在于网格中,返回 true ;否则,返回 false 。

单词必须按照字母顺序,通过相邻的单元格内的字母构成,其中“相邻”单元格是那些水平相邻或垂直相邻的单元格。同一个单元格内的字母不允许被重复使用。

示例 1:

输入:board = [[“A”,“B”,“C”,“E”],[“S”,“F”,“C”,“S”],[“A”,“D”,“E”,“E”]], word = “ABCCED”
输出:true
示例 2:

输入:board = [[“A”,“B”,“C”,“E”],[“S”,“F”,“C”,“S”],[“A”,“D”,“E”,“E”]], word = “SEE”
输出:true
示例 3:

输入:board = [[“A”,“B”,“C”,“E”],[“S”,“F”,“C”,“S”],[“A”,“D”,“E”,“E”]], word = “ABCB”
输出:false

提示:

m == board.length
n = board[i].length
1 <= m, n <= 6
1 <= word.length <= 15
board 和 word 仅由大小写英文字母组成

来源:力扣(LeetCode)
链接:https://leetcode-cn.com/problems/word-search
著作权归领扣网络所有。商业转载请联系官方授权,非商业转载请注明出处。

代码:

import time
from typing import List


class Solution:
    def __init__(self):
        pass

    def dfs(self, visited,row_id,col_id,word_id):
        if row_id<0 or row_id>=self.height or \
                col_id<0 or col_id>=self.width or \
                self.word[word_id]!=self.board[row_id][col_id] or \
                visited[row_id][col_id]:
            return False
        elif word_id==len(self.word)-1:
            return True
        else:
            visited[row_id][col_id]=True
            res = self.dfs(visited, row_id + 1, col_id, word_id+1) or \
                  self.dfs(visited, row_id - 1, col_id, word_id + 1) or \
                  self.dfs(visited, row_id, col_id + 1, word_id + 1) or \
                  self.dfs(visited, row_id, col_id - 1, word_id + 1)
            visited[row_id][col_id]=False
            return res

    def exist(self, board: List[List[str]], word: str) -> bool:
        if len(board)==0 or len(board[0])==0 :return False
        self.board = board
        self.height = len(board)
        self.width = len(board[0])
        self.word = word
        visited=[[0 for _ in range(len(board[0]))] for _ in range(len(board))]
        for row_id,row in enumerate(board):
            for col_id,item in enumerate(row):
                if self.dfs(visited,row_id,col_id,0):
                    return True
        return False


def test(data_test):
    s = Solution()
    return s.exist(*data_test)


def test_obj(data_test):
    result = [None]
    obj = Solution(*data_test[1][0])
    for fun, data in zip(data_test[0][1::], data_test[1][1::]):
        if data:
            res = obj.__getattribute__(fun)(*data)
        else:
            res = obj.__getattribute__(fun)()
        result.append(res)
    return result


if __name__ == '__main__':
    datas = [
        [],
    ]
    for data_test in datas:
        t0 = time.time()
        print('-' * 50)
        print('input:', data_test)
        print('output:', test(data_test))
        print(f'use time:{time.time() - t0}s')

备注:
GitHub:https://github.com/monijuan/leetcode_python

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leetcode_python.utils详见汇总页说明
先刷的题,之后用脚本生成的blog,如果有错请留言,我看到了会修改的!谢谢!

标签:word,self,Leetcode,单词,col,board,079,id,row
来源: https://blog.csdn.net/qq_34451909/article/details/121602773