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Grokking the Coding Interview Patterns in Python

Solution: All Paths From Source to Target

Explore how to use backtracking and depth-first search to find all paths from the source node to the target node in a directed acyclic graph. Learn to track paths recursively and backtrack effectively to ensure all valid routes are captured.

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Statement

You are given a directed acyclic graph (DAG) with nn nodes, labeled from 00 to n−1n - 1. The graph is represented as an adjacency list, where graph[i] is a list of all nodes to which node i has a directed edge to.

Your task is to find all possible paths from node 0 ...