Problems
Business Matters#12238
Medium · Greedy algorithms · Shortest paths
A Wreath for the Fox#12239
Medium · Number theory · Math
Powerful Task#12240
Hard · Greedy algorithms · Data Structures · Math
Alina and the Mountains#12241
Very hard · Divide and Conquer · Prefix Sums · Strings · Data Structures
Apples and Snakes#12242
Very hard · Trees · Dynamic programming · Depth-first Search · Graphs