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
Stack Maze#4295
Very hard
Hashigo Sama#4299
Very hard
Tree#4325
Hard
Party#4327
Very hard
Loopy transit#4409
Medium
Blood Brothers Strike Back#4625
Very hard
Word Count#4672
Very easy
Camelot#4979
Very hard
Rectangle Cutting#5047
Medium
Twelves#5303
Hard
Republics#5464
Hard
Settlement#5485
Hard
Cross-stitch#5624
Very hard
Morphing is fun#5734
Very hard
Lord of the Ring#5755
Very hard
Car Trouble#6026
Medium