Problems
Circles - 2#201
Very easy · Combinatorics
Cubes#202
Very easy · Brute force
Cubes - 2#203
Very easy · Brute force
Inflation rate#204
Hard · Implementation
First non-palindrome#205
Very easy · Brute force · Strings
Tourist#206
Easy · For Beginners
Traffic Lights - 2#207
Easy · Shortest paths
Macros#208
Medium · Implementation · String suffix structures
Copy protection#209
Easy · Graphs
Poem Titles#210
Hard · Dynamic programming · Hashing
Mushroom Foraging#211
Hard · Dynamic programming
Kopatych's Fence#212
Hard · Geometry · Brute force
Rescue the hamsters#213
Medium · Graphs
Hamsters on the Torus#214
Easy · Implementation
Compote Preparation#215
Very easy · Math · Brute force
Treasure Hunt#216
Very hard · String suffix structures · Suffix Array
The Great Secret#217
Easy · Math · Dynamic programming
Shaman's Drum#218
Medium · Geometry
Central heating#219
Very easy
Liars#220
Very easy · Greedy algorithms
Mountain tourism#221
Easy · Prefix Sums
Tanglegram#222
Medium · Divide and Conquer · Sorting
Evolution#223
Very easy · Trees
Merchant#224
Easy · Graphs · Dijkstra algorithm · Dynamic programming
Circles#225
Medium · Geometry · Ternary search
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201-225 of 9178