Shortest paths
Problems on shortest paths, including unweighted and weighted graphs, single-source and all-pairs distances, negative edges and negative cycles, grids and mazes, and paths with extra state such as fuel or time.
The Graphs section of the library covers breadth-first search, 0-1 BFS, Dijkstra's algorithm, Bellman-Ford, SPFA and Floyd-Warshall. Related problem sets are under Dijkstra algorithm, Breadth-first search and Graphs.
Problems
Flight of the Hamster 3#2944
Very hard
Distance between the vertices#2965
Very easy
Alchemy#2991
Hard
Detour Buster#3051
Very hard
In and Out#3121
Hard
Quick out of the Harbour#3124
Very easy
The Safest Path#3206
Medium
Euro Efficiency#3225
Medium
City Under Current#3269
Medium
Light Road#3286
Hard
World Trip#3293
Very hard
Road Construction#3311
Medium
Path#3355
Easy
City Driving#3377
Very easy
Shortest Flight Path#3396
Very hard