Leetcode 1428 Solution

This article provides solution to leetcode question 1428 (jump-game-iii)
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https://leetcode.com/problems/jump-game-iii

Solution

class Solution:
    def canReach(self, arr: List[int], start: int) -> bool:
        q = collections.deque()
        q.append(start)
        left = set(range(len(arr)))
        left.remove(start)

        while q:
            i = q.popleft()

            if arr[i] == 0:
                return True

            if i - arr[i] in left:
                q.append(i - arr[i])
                left.remove(i - arr[i])

            if i + arr[i] in left:
                q.append(i + arr[i])
                left.remove(i + arr[i])

        return False