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
Recursion#553
Very easy
Roads#776
Easy
Get a tree#978
Very easy
Connectivity#982
Very easy
Garden beds#1065
Easy
Queen move!#1098
Very easy
The Flood#1190
Medium
Hop - Don`t Walk#1275
Medium
Recursion#1391
Very hard
Pre, in and post#1513
Medium
Bracket Maze#1557
Medium
Continuous Drawing#1709
Very hard
Genetic Code#1713
Medium
Sum it up#1722
Medium
Locks and keys#1827
Very hard
Ice rink#1940
Hard
Railroad#1979
Medium
Maximum matching#1989
Medium