Feb. 18, 2021
5. Longest Palindromic Substring
C# | 2021-Feb-18 | two dimension dp | iterate on length from 1 to maximum
C# | 2015-06-15 | dp solution | coding style
- K Closest Points to Origin
C# | 2021-Feb-18 | SortedSet<Tuple<double,int>> | maximum heap with size K
C# | 2019-Jan-02 | TLE | SortedDictionary
C# |2019-Jan-02 | TLE | Dictionary<int, HashSet>
C# | 2019 | timeout is really a challenging problem to solve
Feb. 19, 2021
1258. Synonymous Sentences
C# | mock online assessment | Extra one hour | Union Find | DFS | Copy one line
C# | DFS | Backtracking | Union find | StringComparison.Ordinal | more challenges
1128. Number of Equivalent Domino Pairs
C# | Counting sort | Combination subroutine | 2021-Feb-18
Feb. 18, 2021
346. Moving Average from Data Stream
C# | Queue | actual size not maximum | O(1) to remove first one and add current one
1331. Rank Transform of an Array
C# | Sorting | distinct values | 2-18-2021
Sum of Root To Leaf Binary Numbers
C# | Mock online assessment | Tree | Recursive | Calculation challenge | 2021-Feb-19Two Sum BSTs
C# | 2021-02-18 | preorder traversal | two hashSetsRank Transform of an Array
C# | Sorting | distinct values | 2-18-2021Spiral Matrix II
C# | 2021-02-18 | direction array | visited array | automatic direction change | clockwiseRotting Oranges
C# | BFS | Starting from rotten orange | 2021-02-18
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