How to Solve Shortest Path with Alternating Colors Problem
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Shortest Path with Alternating Colors
You are given an integer n, the number of nodes in a directed graph where the nodes are labeled from 0 to n - 1. Each edge is red or blue in this graph, and there could be self-edges and parallel edge...
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Understanding the Shortest Path with Alternating Colors Problem
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Problem Statement
You are given an integer n, the number of nodes in a directed graph where the nodes are labeled from 0 to n - 1. Each edge is red or blue in this graph, and there could be self-edges and parallel edges. You are given two arrays redEdges and blueEdges where: redEdges[i] = [ai, bi] indicates that there is a directed red edge from node ai to node bi in the graph, and blueEdges[j] = [uj, vj] indicates that there is a directed blue edge from node uj to node vj in the graph. Return an array answer of length n, where each answer[x] is the length of the shortest path from node 0 to node x such that the edge colors alternate along the path, or -1 if such a path does not exist.
Shortest Path with Alternating Colors
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Examples
n = 3, redEdges = [[0,1],[1,2]], blueEdges = [][0,1,-1]n = 3, redEdges = [[0,1]], blueEdges = [[2,1]][0,1,-1]Constraints
1 <= n <= 1000 <= redEdges.length, blueEdges.length <= 400redEdges[i].length == blueEdges[j].length == 20 <= ai, bi, uj, vj < nHow Interview Coder Helps with Leetcode Problems
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