Problem intelligence
Recover a Tree From Preorder Traversal
HARD · 6 companies · Binary Tree · Depth-First Search · String · Tree
Interview priority
68
high
Target overlap
0/0
Recency
100
Trend
82
Frequency
94
Company observations
Amazon6m20.9
Amazonolder5.1
Amazonall27.8
Bloombergolder15.4
Bloombergall13.4
Googleolder20.6
Googleall18
Grammarly30d90.6
Grammarly90d93.7
Grammarly6m88.6
Grammarlyall69.6
Metaolder8.7
Metaall8
Microsoftolder14.1
Microsoftall16.1
Why this score
recent activity100
unsolved100
high frequency94
trending82
Local progress
unseen