Problems library (weekly updates)

Question
Contains Duplicate
Power of Two
Single Number III
Calculate H-Index
Expression Add Operators
Additive Number
Coin Change
Wiggle Sort II
Odd Even Linked List
Increasing Triplet Subsequence
Integer Break
Count Numbers with Unique Digits
Valid Perfect Square
Sum of Square Numbers
Sorting Vowels in a Message
Combination Sum IV
Ransom Note
Partition Equal Subset Sum
Delete Node in a Binary Search Tree
Sort Characters By Frequency
Minimum Moves to Equal Array Elements II
Unique Substrings in Wraparound String
Matchsticks to Square
Number Complement
Total Hamming Distance
Non-decreasing Subsequences
Find Bottom Left Tree Value
Find Largest Value in Each Tree Row
Coin Change II
Detect Capital