Problems
Clutch or kick#12200
Very hard · Divide and Conquer · Sorting · Prefix Sums · Data Structures
Comeback#12199
Very hard · Segment Tree · Fenwick Tree · Binary Search · Data Structures · Prefix Sums
Natus ad codicem#12197
Medium · Constructive Algorithms · Combinatorics
A plant#12196
Easy · Math · Combinatorics · Hashing
Grenade throws from Valera#12198
Hard · Dynamic programming · SQRT Decomposition · Prefix Sums · Greedy algorithms