Count Number of Balanced Permutations

Push Dominoes

Count Subarrays With Fixed Bounds

Online Majority Element In Subarray

Put Marbles in Bags

Find All Possible Recipes from Given Supplies

Number of Substrings Containing All Three Characters

Recover a Tree From Preorder Traversal

Find Unique Binary String

The k-th Lexicographical String of All Happy Strings of Length n

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