Problems
Counting Pixels#4222
Hard · Geometry · Math
Enchanted Music Boxes#4223
Medium · Greedy algorithms · Sorting · Combinatorics
Equilateral Dominoes#4224
Very hard · Dynamic programming · Graphs
Four Gate Push#4225
Medium · Brute force · Greedy algorithms
Game Rigging#4226
Medium · Graphs · Breadth-first Search · Greedy algorithms
Highway Construction#4227
Hard · Trees · Depth-first Search · Greedy algorithms · Graphs
Library#4230
Hard · Sorting
Center of the tree#4235
Very easy · Graphs · Trees
Cloudlet#4236
Very hard · Brute force · Geometry
Factorization#4237
Medium · Number theory
Hypercubes#4238
Very easy · Math · Dynamic programming
Laser in a Mirrored Polygon#4239
Very hard · Geometry
Search engine#4240
Very easy · Implementation
Game with Numbers#4241
Easy · Implementation
Puzzle#4242
Very easy · Brute force
Repair#4243
Very easy · Graphs · Shortest paths
Show#4244
Medium · Math
Terminator#4245
Hard · Graphs
Two lines#4246
Medium · Dynamic programming
I Know the Winner#4247
Very easy · Graphs
Tree#4248
Very easy · Graphs
God Created Math#4249
Very easy · Math
Maze#4250
Easy · Implementation
Maze Again#4251
Easy · Graphs
Region#4252
Medium · Combinatorics · Geometry · Math