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Algorithms

Number of Subarrays That Match a Pattern II

Number of Substrings With Fixed Ratio

Number of Substrings With Only 1s

November 29, 2024 · 4 min ·  Tags List of tags for the post   leetcode ·  math ·  string ·  Last updated: Aug 2, 2025

Number of Unequal Triplets in Array

Number of Unique Categories

Number of Unique Flavors After Sharing K Candies

Number of Valid Subarrays

Number of Valid Words in a Sentence

November 29, 2024 · 7 min ·  Tags List of tags for the post   leetcode ·  string ·  Last updated: Aug 2, 2025

Number of Visible People in a Queue

Number of Ways to Buy Pens and Pencils

November 29, 2024 · 4 min ·  Tags List of tags for the post   enumeration ·  leetcode ·  math ·  Last updated: Aug 2, 2025
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