Number of Ways to Wear Different Hats to Each Other: coding question

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Count the number of ways to assign distinct hats (labels 1..40) to n ≤ 10 people given each person's allowed hat list, returning the answer mod 1e9+7. This is typically solved with bitmask DP over subsets of people (iterating hats and assigning them to feasible, currently-unassigned people) to avoid exploring all permutations.

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Leetcode 1434. Number of Ways to Wear Different Hats to Each Other
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Roblox
Number of Ways to Wear Different Hats to Each Other
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Roblox
Number of Ways to Wear Different Hats to Each Other
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Source snapshot: Oct 20, 2026
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Number of Ways to Wear Different Hats to Each Other

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Number of Ways to Wear Different Hats to Each Other

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