Too Many Litchi

• two sum
• add two numbers
• length of longest substring
• find median sorted arrays
• longest palindrome
• reverse
• is match
• max area
• three sum
• letter combinations
• remove nth from end
• is valid
• merge two lists
• generate parenthesis
• merge k lists
• reverse k group
• divide
• search
• search range
• is valid sudoku
• first missing positive
• trap
• permute
• rotate
• group anagrams
• pow
• max sub array
• spiral order
• can jump
• merge
• insert
• unique paths
• set zeroes
• sort colors
• min window
• subsets
• exist
• largest rectangle area
• num decodings
• inorder traversal
• is valid bst
• symmetric tree
• binary tree level order traversal
• binary tree zigzag level order traversal
• maximum depth of binary tree
• construct binary tree from preorder and inorder traversal
• construct binary tree from inorder and postorder traversal
• convert sorted array to binary search tree
• best time to buy and sell stock ii
• binary tree maximum path sum

• populating next right pointers in each node
• pascals triangle
• best time to buy and sell stock
• best time to buy and sell stock ii
• binary tree maximum path sum

• three sum
• search
• search range
• search matrix
• delete duplicates
• longest consecutive
• sum numbers
• gas station
• search min
• find peak element