Problems
Very simple problem#4378
Very hard · Math
Three Bit Computer#4379
Very hard · Trees
Three Bit Computer strikes back#4380
Medium · Graphs
Express delivery#4381
Very hard · Implementation
Die Young#4382
Easy · Dynamic programming
Football#4383
Very hard · Geometry · Constructive Algorithms
Football 2#4384
Medium · Geometry · Convex Hull
Union of circles#4385
Very hard · Geometry
Jungle Outpost#4386
Very easy · Convex Hull · Geometry
Triathlon#4387
Very easy · Geometry
Meeting place can not be changed#4388
Easy · Brute force · Implementation · Sorting
Intersection of nonconvex polygons#4389
Very hard · Geometry · Implementation
The Life of Insects#4390
Hard · Geometry · Constructive Algorithms
Oil pipelines#4391
Medium · Graph network flows
Operation "Steak or Boiling"#4392
Easy · Graphs · Dynamic programming
Work Scheduling#4393
Very easy · Graphs
Yen algorithm#4394
Easy · Graphs · Shortest paths
Sea Battle#4395
Medium · Implementation
The Last Eye#4396
Easy · Sorting
Wandering Circus#4397
Very easy · Implementation
The Lair of Computer Shamans#4398
Medium · Implementation
Highlander#4399
Very easy · Graphs
For kefir!#4400
Easy · Greedy algorithms · Implementation
The Call of Rain#4401
Easy · Dynamic programming · String suffix structures
Math Lessons#4402
Medium · Geometry