Build a Matrix With Conditions Problem

Find Valid Matrix Given Row and Column Sums Problem

Lucky Numbers in a Matrix Problem

Delete Nodes And Return Forest Problem

Step-By-Step Directions From a Binary Tree Node to Another

Create Binary Tree From Descriptions Problem

Design log Order records

Maximum Score From Removing Substrings Problem

Find the Winner of the Circular Game

Find the Minimum and Maximum Number of Nodes Between Critical Points Problem

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