Different variables

*special problem

Superstitions Inspection

*special problem

Black Cat Rush

*special problem

Chess Rush

*special problem, combinatorics, dp, implementation, math

Inverse Problem

*special problem, combinatorics, dp

Pawns

*special problem

Road Repair in Treeland

*special problem, binary search, dp, trees

Paint the String

*special problem, dp, strings

The Hero with Bombs

*special problem

Loader

*special problem, graphs

Two Railroads

*special problem

Scissors and Tape

*special problem, constructive algorithms, geometry

Good Subsets

*special problem, dp

Unusual Graph

*special problem, graphs

Demonic Invasion

*special problem, flows

Burenka and Pether

*special problem, data structures, dfs and similar, divide and conquer, dsu, graphs, sortings, trees

Flower Shop

*special problem, data structures, fft, math

Falling Blocks

*special problem, data structures

Equal Trees

*special problem, graphs, meet-in-the-middle

Draw Polygon Lines

*special problem, constructive algorithms, dp, geometry, interactive

Necromancer

*special problem

BuberPool Taxi Optimization

*special problem, interactive

Deterministic Scheduling for Extended Reality over 5G and Beyond

*special problem

Communication Routing Challenge

*special problem

Collaboration

*special problem

University Schedule

*special problem