How to Solve Minimum Time for K Connected Components Problem
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Minimum Time for K Connected Components
You are given an integer n and an undirected graph with n nodes labeled from 0 to n - 1. This is represented by a 2D array edges, where edges[i] = [ui, vi, timei] indicates an undirected edge between ...
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Understanding the Minimum Time for K Connected Components Problem
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Problem Statement
You are given an integer n and an undirected graph with n nodes labeled from 0 to n - 1. This is represented by a 2D array edges, where edges[i] = [ui, vi, timei] indicates an undirected edge between nodes ui and vi that can be removed at timei. You are also given an integer k. Initially, the graph may be connected or disconnected. Your task is to find the minimum time t such that after removing all edges with time <= t, the graph contains at least k connected components. Return the minimum time t. A connected component is a subgraph of a graph in which there exists a path between any two vertices, and no vertex of the subgraph shares an edge with a vertex outside of the subgraph.
Minimum Time for K Connected Components
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Examples
n = 2, edges = [[0,1,3]], k = 23Initially, there is one connected component {0, 1}. At time = 1 or 2, the graph remains unchanged. At time = 3, edge [0, 1] is removed, resulting in k = 2 connected components {0}, {1}. Thus, the answer is 3.
n = 3, edges = [[0,1,2],[1,2,4]], k = 34Initially, there is one connected component {0, 1, 2}. At time = 2, edge [0, 1] is removed, resulting in two connected components {0}, {1, 2}. At time = 4, edge [1, 2] is removed, resulting in k = 3 connected components {0}, {1}, {2}. Thus, the answer is 4.
n = 3, edges = [[0,2,5]], k = 20Since there are already k = 2 disconnected components {1}, {0, 2}, no edge removal is needed. Thus, the answer is 0.
Constraints
1 <= n <= 1050 <= edges.length <= 105edges[i] = [ui, vi, timei]0 <= ui, vi < nui != vi1 <= timei <= 1091 <= k <= nThere are no duplicate edges.How Interview Coder Helps with Leetcode Problems
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