每天1-3题 坚持了两年 立帖继续打卡

1746.Maximum Subarray Sum After One Operation

1698.Number of Distinct Substrings in a String

1731.The Number of Employees Which Report to Each Employee

255.Verify Preorder Sequence in Binary Search Tree

1371.Find the Longest Substring Containing Vowels in Even Counts

1065.Index Pairs of a String

1647.Minimum Deletions to Make Character Frequencies Unique

654.Maximum Binary Tree

920.Number of Music Playlists

777.Swap Adjacent in LR String