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Leetcode 1306. Jump Game III

热度:3   发布时间:2023-12-12 20:55:07.0

文章作者:Tyan
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1. Description

Jump Game III

2. Solution

**解析:**Version 1,使用广度优先搜索,其实是个二叉树遍历问题,使用字典记录搜索过的索引,每次根据当前值计算下一次搜索的左右索引,如果在数组范围内且没被搜索过,则将其记录到队列中,依次搜索,如果当前值为0,返回True,如果队列为空时都没找到,则返回False

  • Version 1
class Solution:def canReach(self, arr: List[int], start: int) -> bool:n = len(arr)queue = collections.deque()queue.append(start)records = {
    }while queue:index = queue.popleft()value = arr[index]if value == 0:return Truerecords[index] = valueleft = index - valueright = index + valueif left > -1 and left not in records:queue.append(left)if right < n and right not in records:queue.append(right)return False

Reference

  1. https://leetcode.com/problems/jump-game-iii/
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