LeetCode Medium 802 Find Eventual Safe States - Java Solution Explained Using DFS & Memoization

LeetCode Medium 802 Find Eventual Safe States - Java Solution Explained Using DFS & Memoization

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Problem Description:

There is a directed graph of n nodes with each node labeled from 0 to n - 1. The graph is represented by a 0-indexed 2D integer array graph where graph[i] is an integer array of nodes adjacent to node i, meaning there is an edge from node i to each node in graph[i].

A node is a terminal node if there are no outgoing edges. A node is a safe node if every possible path starting from that node leads to a terminal node.

Return an array containing all the safe nodes of the graph. The answer should be sorted in ascending order.

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[ravishraj]

It will be great if you also discuss time and space complexity. And Your step by step output in stdout is really great