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Longest Substring Without Repeating Characters

Lexicographically Smallest String After Operations With Constraint

Find Minimum Diameter After Merging Two Trees

Number of Distinct Substrings in a String

Check if a Parentheses String Can Be Valid

Find First and Last Position of Element in Sorted Array

Minimum Number of Swaps to Make the String Balanced

Populating Next Right Pointers in Each Node

Minimum Number of Taps to Open to Water a Garden

Minimum One Bit Operations to Make Integers Zero

Amount of Time for Binary Tree to Be Infected

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