Problems
New-year presents#26
Medium · Greedy algorithms
Cycle shifts#27
Easy · Number theory · Bitmasks · Bitwise Operations
Product#28
Medium · Implementation · Math
Certification#30
Medium · Dynamic programming · Combinatorics
Superstitious Santa Claus#31
Very easy
Knight and Pawn#32
Medium · Games · Dynamic programming
The favourite numbers of Santa Claus#33
Easy · Number theory
The word of sponsor#34
Medium · Graphs
Triangles from Matches#35
Medium · Math
Gorynych the Dragon#36
Easy · Math
Mail of the Sponsor#37
Very easy · Graphs · Breadth-first Search
Firs Protection#38
Medium
Sponsor’s Money#39
Easy · Dynamic programming
Water supply#40
Easy · Graphs
Command of the Mayor#41
Easy · Graphs
Green spot#42
Medium · Geometry
Competitors’ quantity of the Olympiad#43
Very easy · Number theory
The number of ones#44
Easy · Dynamic programming
The Fuel#45
Very easy · Graphs · Implementation · Greedy algorithms
The Segments#46
Very easy · Dynamic programming
The Parquet of the Triangles#47
Easy · Graphs · Implementation
The Red and Blue Squares#48
Easy · Geometry
Smart Feeder#49
Easy · Geometry
The cut number#50
Easy · Brute force · Math
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