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Grokking the Coding Interview Patterns in Python

Solution: Longest Cycle in a Graph

Explore methods to detect and calculate the longest cycle length in a directed graph by using iterative traversal and visit time tracking. Understand how to efficiently process each node to find cycles and evaluate graph structures in coding interviews.

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Statement

You are given a directed graph with n nodes, labeled from 0 to n - 1. Each node in the graph has at most one outgoing edge.

The graph is described using a 0-indexed integer array edges of length n, where:

  • edges[i] represents a directed edge from node i to node edges[i]. ...