Aligned malloc and matching free in CCodingLockedWrite an allocator in C that hands out memory starting at an address that is a multiple of a requested alignment, and the function that gives that memory back. You may use only…
Last asked Oct 2026
#pointers
Flatten a linked list with side branches into one doubly linked listCodingLockedEach node of a linked list has a forward link and may also have one side branch: a link to the head of another list, whose nodes may have side branches of their own. Flatten the…Last asked Sep 2026
Lowest common ancestor with parent pointersCodingEach node of a binary tree has value, left, right and parent fields. You are given references to two nodes p and q of the same tree, but not the root. Return their lowest common…Last asked Feb 2026
Populate next pointers in a perfect binary treeCodingYou are given a perfect binary tree: every internal node has two children and all leaves are on the same level. Each node has left, right and next. Set every node's next to the…Last asked Feb 2026- Reverse nodes in k-groupCodingGiven the head of a singly linked list and an integer k, reverse the nodes in each consecutive block of k nodes and return the new head. If fewer than k nodes remain at the end…Last asked Oct 2025