Problems
Control chain#5229
Very hard · Graphs · Trees
Cube#5230
Very hard · Implementation
Duty#5231
Medium · Graphs · Greedy algorithms
Method of linear transformation#5232
Very easy · Math
Watson`s magic number#5233
Very easy · Matrix
Formatting#5234
Easy · Math
Two flower beds#5235
Easy · Geometry
Photography#5236
Medium · Prefix Sums · Two pointers
Triangular Circles#5237
Hard · Geometry
Archiver#5238
Hard · Dynamic programming
Incorrect bracket sequences#5239
Very hard · Combinatorics
Cohesive team#5240
Medium · Graphs
Quest#5241
Medium · Number theory · Math
System Administrator#5242
Easy · Segment Tree · Prefix Sums
Reversi#5243
Very hard · Brute force
Entertainment in the gaming hall#5244
Easy · Greedy algorithms · Sorting
Boat#5245
Very hard · Graphs · Shortest paths
Elephants#5246
Medium · Geometry
Simple Strings (Easy)#5247
Hard · Strings · Greedy algorithms
Simple strings#5248
Medium · Strings · Greedy algorithms · Prefix Sums
Two Strings (Easy)#5249
Easy · Brute force · Strings
Two strings#5250
Very hard · Strings · Brute force
Numbers#5251
Very hard · Bitwise Operations
Penalty#5252
Easy · Brute force · Implementation
Rectangle Partitioning#5253
Hard · Geometry