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Largest Independent set of nodes problem
By psywoo, history, 2 years ago, In English

Problem : You are given a connected graph with N nodes and M edges, graph does not contain multiple edges and self loops. An independent set of nodes is the set in which no two nodes are connected to each other. You need to find the largest independent set.

Constraints : 3 <= N <= 1e5 and (N — 1) <= M <= 2e5

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2 years ago, # |
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It is NP-hard problem in general.

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    2 years ago, # ^ |
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    any Proof for why is it NP — hard ?

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      2 years ago, # ^ |
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      page 12 of this

      NP hardness also noted in "Independent set (graph theory)" wikipedia article.

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