Remove Covered Intervals

Open the Lock Problem

Merge Triplets to Form Target Triplet

Eliminate Maximum Number of Monsters

Unique Length-3 Palindromic Subsequences

Frequency of the Most Frequent Element

Partition Equal Subset Sum

Minimum Number of Swaps to Make the String Balanced Problem

Count number of bits to be flipped to convert A to B

Find smallest letter greater than target in a sorted array of letters

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