Number of Music Playlists: coding question

Available question text

Count the number of length-goal sequences using n distinct songs such that every song appears at least once and a song can be replayed only after k other songs have been played, returning the result modulo 1e9+7. This is a combinatorics/DP problem (inclusion–exclusion or recurrence) to account for permutations and the cooldown constraint with n ≤ goal ≤ 100.

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Google
Leetcode 920. Number of Music Playlists
Reported Jul 29, 2024 · 1 source report
JUNIOR
Source snapshot: Nov 12, 2026
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ServiceNow
Number of Music Playlists
Reported date not specified · Source window: 3mo
Source snapshot: Oct 20, 2026
Source frequency score: 100. This is not an interview probability.
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ServiceNow
Number of Music Playlists
Reported date not specified · Source window: 6mo
Source snapshot: Oct 20, 2026
Source frequency score: 100. This is not an interview probability.
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Number of Music Playlists

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Number of Music Playlists

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