Add derivable shortcuts to a path DAG so every ordered pair is reachable within three edges.
All challenges
Move soil with a truck to level a grid while minimizing loading, travel, and unloading cost.
Choose ten bounded interval shifts and report the resulting longest increasing subsequence length.
Coordinate simultaneous card passing until every player holds only their own label.
Fit a compact symbolic expression to a source-derived regression dataset.
Fit a compact symbolic expression to a source-derived regression dataset.
Fit a compact symbolic expression to a source-derived regression dataset.
Fit a compact symbolic expression to a source-derived regression dataset.
Fit a compact symbolic expression to a source-derived regression dataset.
Synthesize a short A=B rewriting program for substring detection test families.
Cut a cake with straight lines to create pieces matching requested strawberry counts.
Reconstruct a hidden tree using Steiner-membership queries.