Depth-first Search
Problems on depth-first search, including connected components, cycle detection, entry and exit times, bridges and articulation points, strongly connected components, topological sorting, and traversals of trees and grids.
The Graphs section of the library covers depth-first search, connected components, cycle detection, strongly connected components and topological sort. Related problem sets are under Graphs and Trees.
Problems
Box Run#6033
Easy
Thread Tree#6160
Easy
Optimal alpha beta pruning#6164
Very hard
Meteorite#6195
Very hard
Billing Tables#6292
Very hard
Cash Cow#6385
Medium
Cracking the Safe#6408
Medium
Tree#6450
Very easy
Time to live#6552
Medium
Magic Graphs#6580
Very hard
Joining Couples#6604
Very hard
Frozen Rose-Heads#6619
Medium
Colors#6850
Hard
Nurikabe#6915
Hard
Pebbles#7202
Medium