Your Dashboard
Interview Coaching
Learn
System Design
ML System Design
Code
Behavioral
Salary Negotiation
Interview Guides
Search
⌘K
Get Premium
Leetcode 1830. Minimum Number of Operations to Make String Sorted
Compute how many distinct permutations of the multiset of characters in s are lexicographically smaller than s (equivalently the number of previous-permutation steps to reach the sorted string), returning the count modulo 10^9+7. The core challenge is efficient combinatorial counting of permutations with duplicates (multinomial coefficients/factorials with modular inverses) for n up to 3000.
Question Timeline
See when this question was last asked and where, including any notes left by other candidates.
All Regions
Comments
Hello Interview Premium
Your account is free and you can post anonymously if you choose.