Problems
Chess#5177
Very hard · Greedy algorithms
Cycle#5178
Easy · Graphs · Shortest paths
Folding#5179
Very easy · Dynamic programming
Network Breach#5180
Hard · Graphs
Hitchhiking Across the Galaxy#5181
Easy · Graphs · Shortest paths
A clearing of firewood#5182
Easy · Binary Search · Ternary search
Counters#5183
Very easy · Implementation
Antagonistic Game#5184
Very easy · Dynamic programming
Point of medians intersection#5185
Very easy · Math
Center of inscribed circle#5186
Very easy · Geometry
Intersection Point of Altitudes#5187
Easy · Geometry
Construct square 2#5189
Easy · Geometry
Construct a triangle with two sides and the included angle#5190
Very easy · Geometry
Construct a triangle 2#5191
Very easy · Geometry
Construct a triangle 3#5192
Easy · Geometry
Construct triangle 4#5193
Very easy · Geometry
Boris, You Are Wrong!#5194
Very easy · Geometry
Divide an Island!#5195
Medium · Geometry
Merging Sequences#5196
Medium · Binary Search
Fibonacci Numbers#5197
Medium · Dynamic programming · Math · Strings
Modular Exponentiation#5198
Very easy · Number theory
Exact match#5199
Very easy · Binary Search · Implementation
Darts#5200
Hard · Implementation
K-th minimum#5201
Very easy · Binary Search
Preference#5202
Very hard · Brute force · Implementation