03/27 code list

137. Clone Graph
421. Simplify Path

101. Remove Duplicates from Sorted Array II

480. Binary Tree Paths

442. Implement Trie (Prefix Tree)

406. Minimum Size Subarray Sum

57. 3Sum

156. Merge Intervals

7. Serialize and Deserialize Binary Tree

86. Binary Search Tree Iterator

428. Pow(x, n)

17. Subsets

528. Flatten Nested List Iterator

420. Count and Say

515. Paint House

516. Paint House II

911. Maximum Size Subarray Sum Equals k

602. Russian Doll Envelopes

178. Graph Valid Tree

1016. Minimum Swaps To Make Sequences Increasing