Problems
Olympiad and the Internet#226
Easy · Implementation · Greedy algorithms
Venusian programmers#227
Very hard · Greedy algorithms
Lake Navigation – 2#228
Hard · Graphs
Boundaries#229
Easy · Geometry · Convex Hull
Brackets parade#230
Very easy · Combinatorics · Dynamic programming
Adventures#231
Very hard · Graphs · Dynamic programming
Lazy visitor#232
Very hard · Sorting · Greedy algorithms
The Neighbor#233
Medium · Graphs
Mafia#234
Easy · Dynamic programming
Spring#235
Very easy · Implementation
Triomino#236
Very easy · Combinatorics
Immovable Elements of a Matrix#237
Medium · Implementation
Wolves#238
Easy · Binary Search
Triangles#239
Easy · Combinatorics · Math
Similarity#240
Medium · Implementation
Swamp#241
Medium · Graphs · Brute force
Prime number#242
Easy · Brute force
Polygon#243
Medium · Geometry
All-terrain vehicle#244
Medium · Geometry
The best approximation of pi#245
Very easy · Brute force
Pyramid#246
Medium · Dynamic programming · Math
Unhappy Bus#247
Very easy · Bitmasks · Implementation
Young gardener#248
Very easy · Math
The Very Hard One#249
Easy · Math · Number theory
Robots and Oil Transportation System#250
Medium · Graphs · Dijkstra algorithm