Leetcode Problem 2782. Number of Unique Categories

2782. Number of Unique Categories

Leetcode Solutions

Depth-First Search (DFS) to Find Unique Categories

  1. Initialize an empty adjacency list adj for each of the n nodes.
  2. Iterate over each pair of nodes (i, j) and if haveSameCategory(i, j) returns true, add an undirected edge between i and j in adj.
  3. Initialize a boolean list vis with all false values and a variable components as 0.
  4. Iterate over each node i: a. If vis[i] is false, perform DFS starting from node i. b. In each DFS call, mark the node as visited and recursively visit all unvisited adjacent nodes. c. Increment components each time a new DFS is initiated.
  5. Return the value of components.
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Greedy Approach to Count Unique Categories

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