Available question text
Populate each node's next pointer to point to its immediate right neighbor on the same level (or NULL if none) in a binary tree that may be incomplete. The challenge is to perform this in-place with only constant extra space (recursive stack space allowed).
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Leetcode 117. Populating Next Right Pointers in Each Node II
Reported Oct 1, 2026 · 1 source report
STAFF
Source snapshot: Nov 12, 2026
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Leetcode 117. Populating Next Right Pointers in Each Node II
Reported Oct 14, 2025 · 1 source report
STAFF
Source snapshot: Nov 12, 2026
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