Day 1 : Detect Capital
Day 2 : Design Hashset
Day 3 : Valid Palindrome
Day 4 : Power Of Four
Day 5 : Add and Search Word - Data structure design
Day 6 : Find All Duplicates in an Array
Day 7 : Vertical Order Traversal of a Binary Tree
Day 8 : Path Sum III
Day 9 : Rotting Oranges
Day 10 : Excel Sheet Column Number
Day 11 : H-Index