A serial offender with 134 previous convictions has been jailed for six months for a string of burglaries, including two break-ins at a community centre on consecutive nights. Patrick Lynch (50), of ...

* Given a binary tree, return the level order traversal of its nodes' values. (ie, from left to right, level by level).

NHS waiting lists in Wales have reached their highest figure on record after increasing for the sixth month in a row. New data released today shows that the number of patient pathways waiting to start ...

Given a non-empty binary tree, find the maximum path sum. For this problem, a path is defined as any sequence of nodes from some starting node to any node in the tree along the parent-child ...