Antifibonacci Cut

bitmasks, combinatorics, constructive algorithms, data structures, dp, hashing, math

Lookup Tables

bitmasks

Koxia and Sequence

bitmasks, combinatorics, dp, math, number theory

MST with Matching

bitmasks, brute force, dsu, graph matchings, trees

String Transformation 2

bitmasks, dp, graphs, trees

Max Correct Set

bitmasks, dp, math

To Make 1

bitmasks, constructive algorithms, dp, greedy, number theory

Bitwise Paradox

binary search, bitmasks, data structures, greedy, two pointers

Professional layer

bitmasks, dp

Xor-Set

bitmasks, divide and conquer, math

Restoring Map

bitmasks, constructive algorithms, trees

Little C Loves 3 III

bitmasks, dp, math

Wise Men (Hard Version)

bitmasks, dp, math

New Year and Binary Tree Paths

bitmasks, brute force, combinatorics, dp

Chests and Keys

bitmasks, brute force, dfs and similar, dp, flows

Feeling Good

bitmasks, data structures

Tree Cutting

bitmasks, dfs and similar, dp

Four Suits

binary search, bitmasks, flows, greedy

Favorite Game

bitmasks, dp

Matvey's Birthday

bitmasks, graphs

Gates to Another World

bitmasks, data structures, dsu, two pointers

Code Lock

bitmasks, dp

Hex Dyslexia

bitmasks, brute force, dp, graphs

Egg Roulette

bitmasks, brute force, divide and conquer, math, meet-in-the-middle

Mateusz and an Infinite Sequence

bitmasks, brute force, dp, strings

Kuroni and Antihype

bitmasks, brute force, dp, dsu, graphs

Nora's Toy Boxes

bitmasks, combinatorics, dp

Chiori and Doll Picking (hard version)

bitmasks, brute force, combinatorics, math

Communism

bitmasks, dp, trees

Cheat and Win

bitmasks, data structures, games, trees

Phoenix and Bits

bitmasks, brute force, data structures, sortings

Good Graph

bitmasks, dfs and similar, graph matchings, graphs, implementation

Bugaboo

bitmasks, constructive algorithms, dp, number theory