Looking for Owls

binary search, data structures, geometry, hashing, sortings

Santa's Gift

data structures, trees

Nene and the Passing Game

constructive algorithms, data structures, dsu, graphs, sortings

Prefix Max Set Counting

data structures, dp, trees

Secret Letters

data structures, dp, greedy

Two Subtrees

data structures, trees

Sasha and a Patient Friend

binary search, data structures, implementation

Antifibonacci Cut

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

Tape Programming

data structures, implementation

Ball-Stackable

constructive algorithms, data structures, dp, trees

Stations

data structures

Managing Telephone Poles

data structures, geometry

Holy Diver

data structures

Take Metro

brute force, data structures, graphs

Lucky Pair

combinatorics, data structures, implementation

Hopping Around the Array

data structures, dp

Bully Sort

data structures, math

Impressive Harvesting of The Orchard

data structures

Palindrome Addicts

data structures, strings

Berland.Taxi

data structures

The Fair Nut's getting crazy

data structures, implementation

Phoenix and Diamonds

binary search, data structures, sortings

Meta-universe

data structures

Slalom

data structures, dp, sortings

The Third Grace

data structures, dp

Собачки и миски

data structures, greedy, sortings

Pebbles and Beads

data structures, geometry

Dune II: Battle For Arrakis

*special problem, data structures, greedy, math

Just Kingdom

brute force, data structures, dfs and similar

Significant Cups

*special problem, binary search, data structures, two pointers

Landmarks

data structures, dp

Speckled Band

data structures, divide and conquer, hashing, string suffix structures, strings

Cheat and Win

bitmasks, data structures, games, trees

Phoenix and Bits

bitmasks, brute force, data structures, sortings

Subset Trick

binary search, data structures

Caramel Clouds

data structures, dp, sortings

Three Arrays

data structures

Digital Patterns

combinatorics, data structures, implementation, math

Cubes

data structures, dp, geometry, two pointers

Bakery

data structures, dsu

Palindromic Doubles

*special problem, data structures, dp

MEXanization

data structures

MEX Tree Manipulation

data structures, trees

Two Rooted Trees

data structures, implementation, trees

Mages and Monsters

data structures, geometry

Codeforces Scoreboard

binary search, data structures, dp, geometry

Mahmoud and Ehab and the final stage

data structures, strings

Sequence Transformation

brute force, data structures, dp, implementation, math

Journey

data structures, divide and conquer, graphs, trees

Flow Control

data structures, dsu, implementation

Two Circles

brute force, data structures, implementation

Mashmokh's Designed Problem

data structures

Wizards and Roads

data structures, divide and conquer, graph matchings, graphs, greedy

Two Posters

brute force, data structures, greedy, two pointers

Graph Coloring

data structures, graphs, interactive

Iqea

data structures, dfs and similar, divide and conquer, dsu, shortest paths, trees

The Riddle of the Sphinx

binary search, data structures, data structures, interactive

Growing flowers

data structures

Inna and Babies

binary search, data structures, dsu, geometry, implementation

Supercollider

data structures

ELCA

data structures, trees

Arpa’s abnormal DNA and Mehrdad’s deep interest

data structures, string suffix structures

Two Characters, Two Colors

binary search, data structures, dp, flows, greedy

Matrix

data structures

Sequence Recovery

bitmasks, data structures, greedy

Escaping on Beaveractor

data structures, implementation, trees

Dogecoin

*special problem, *special problem, binary search, data structures

Doremy's Paint 2

data structures

Moonwalk challenge

data structures, strings, trees

Diamond Theft

data structures, greedy

Rivalries

constructive algorithms, data structures, greedy

Cyclic Sum

data structures, fft, number theory

Decent Division

constructive algorithms, data structures

Alphabetic Tree

binary search, data structures, dfs and similar, hashing, string suffix structures, strings, trees

Treasure Hunt

data structures, divide and conquer, two pointers

Johnny and New Toy

data structures, implementation, math

Burenka, an Array and Queries

data structures, math, number theory

Detect Robots

data structures, strings

Array Covering

data structures

The Ultimate LIS Problem

data structures, greedy

Red Blue Tree

data structures, implementation, trees

Turing's Award

data structures, dp

PermutationForces

data structures, greedy

Moving Walkways

data structures, greedy, math

Rap God

data structures, dfs and similar, hashing, strings, trees

Balance the Cards

constructive algorithms, data structures, divide and conquer, geometry, graphs, implementation

Balls and Pockets

data structures

Multiple of Three Cycles

combinatorics, data structures, dp, dsu, math

Late For Work (submissions are not allowed)

data structures, greedy, schedules, shortest paths

Dreamoon and Notepad

data structures

Willy-nilly, Crack, Into Release!

data structures, dp

Visible Black Areas

data structures, dsu, geometry, trees

Duck Hunt

data structures

LuoTianyi and Cartridge

data structures, trees

Almost Certainly

*special problem, constructive algorithms, data structures, sortings

Upside Down

data structures, string suffix structures, strings, trees

Freak Joker Process

binary search, data structures, sortings

Balanced Distribution

data structures, dp, greedy

Mixture

*special problem, data structures, geometry, math, sortings

Clubstep

binary search, brute force, data structures, greedy, trees