Status: 1.0.0-beta — usable today and actively developed. The on-disk format and public APIs are stabilizing toward a 1.0 release; feedback from real use is exactly what we're looking for. You update ...

From travelling to Haiti to visit a coffee farm two years after a devastating earthquake hit the country, to hearing the story of a coffee grower whose husband was killed during a genocide in Rwanda, ...

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 ...