TitleDifficultyCompaniesVideos
Serialize and Deserialize N-Ary TreeHardamazon apple ebay facebook google linkedin microsoft pinterest uber
Open the Lock ProblemMediumamazon bloomberg facebook google uber
Trim a Binary Search Tree BSTMediumadobe amazon apple bloomberg facebook google microsoft yahoo
Flatten Binary Tree to Linked List in Order of Preorder TraversalMediumadobe amazon apple bloomberg bytedance coupang databricks facebook google microsoft nvidia oracle uber yahoo
Encode and Decode TinyURL ProblemMediumadobe amazon bloomberg facebook google microsoft oracle uber
Flip Equivalent Binary Trees ProblemMediumamazon ebay google
Decode String ProblemMediumalibaba amazon appdynamics apple atlassian bloomberg bytedance cisco coupang cruise-automation ebay facebook google huawei hulu microsoft oracle salesforce snapchat tencent vmware yahoo yelp
Partition Equal Subset Sum ProblemMediumamazon apple ebay facebook google microsoft paypal uber vmware yahoo
Longest Absolute File Path ProblemMediumamazon apple facebook google uber wish
Longest Substring with K distinct charactersgoogle
Rotate String ProblemEasyamazon apple ebay linkedin microsoft oracle google