In the Knapsack problem, consider the setting where the size equals the value (s;=v,). And Let 1,2.k be the items packed in an optimal solution where v-12Vi for 1 slsk, then.. (Multi-choose) If an algorithm packs any k/of these items, then it gives a 2-approximation Jf an algorithm packs at least the items 1,2,.rk/21, then it is a 2-approximation Any optimal algorithm must pack all items 1,2.k

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