DZY Loves Modification

brute force, data structures, greedy

DZY Loves Sequences

dp, implementation, two pointers

DZY Loves Chemistry

dfs and similar, dsu, greedy

DZY Loves Chessboard

dfs and similar, implementation

DZY Loves Planting

binary search, dsu, trees

DZY Loves Strings

binary search, hashing, strings, two pointers

DZY Loves Colors

data structures

DZY Loves FFT

probabilities

DZY Loves Physics

greedy, math

Kolya and Tandem Repeat

brute force, implementation, strings

Anton and Letters

constructive algorithms, implementation

Gena and Second Distance

geometry

Adam and Tree

data structures, trees

Artem and Array

data structures, greedy

Andrey and Problem

greedy, math, probabilities

Borya and Hanabi

bitmasks, brute force, implementation

Valera and Number

bitmasks, dp, math, probabilities

Valera and Swaps

constructive algorithms, dsu, graphs, implementation, math, string suffix structures

Valera and Tubes

constructive algorithms, dfs and similar, implementation

Valera and Fruits

greedy, implementation

Valera and Antique Items

implementation

Berland Federalization

dp, trees

One-Based Arithmetic

brute force, dfs and similar, divide and conquer

Balancer

greedy, implementation

Forgotten Episode

implementation

Devu and Birthday Celebration

combinatorics, dp, math

Devu and his Brother

binary search, sortings, ternary search, two pointers

Devu and Partitioning of the Array

brute force, constructive algorithms, implementation, number theory

Devu, the Dumb Guy

implementation, sortings

Devu, the Singer and Churu, the Joker

greedy, implementation

The Child and Binary Tree

combinatorics, divide and conquer, fft, number theory

The Child and Sequence

data structures, math

The Child and Polygon

dp, geometry

The Child and Zoo

dsu, sortings

The Child and Toy

graphs, greedy, sortings

The Child and Set

bitmasks, greedy, implementation, sortings

The Child and Homework

implementation

Banners

brute force, data structures, dp

Cardboard Box

data structures, greedy

Pudding Monsters

dp

Dungeons and Candies

dsu, graphs, greedy, trees

Om Nom and Spiders

implementation, math

Feed with Candy

greedy

Special Graph

Special Grid

brute force, dp, greedy

Cardiogram

implementation

Pasha Maximizes

greedy

Queue on Bus Stop

implementation

Furukawa Nagisa's Tree

binary search, divide and conquer, sortings, trees

Nanami's Power Plant

flows

Tachibana Kanade's Tofu

dp

Nanami's Digital Board

dsu, implementation

Ryouko's Memory Note

implementation, math, sortings

Kuriyama Mirai's Stones

dp, implementation, sortings

Kitahara Haruki's Gift

brute force, implementation

Square Tiling

constructive algorithms, greedy

Prefixes and Suffixes

dp, string suffix structures, strings, two pointers

Prime Swaps

greedy, sortings

Football Kit

brute force, greedy, implementation

Choosing Teams

greedy, implementation, sortings

Chemistry Experiment

binary search, data structures, ternary search

Random Task

binary search, bitmasks, combinatorics, dp, math

k-Tree

dp, implementation, trees

Shower Line

brute force, implementation

Black Square

implementation

Balls Game

brute force, two pointers

Points and Segments (easy)

constructive algorithms, sortings

Points and Segments

graphs

Tricky Function

data structures, divide and conquer, geometry

Guess the Tree

bitmasks, constructive algorithms, dp, greedy, trees

Working out

dp

Xor-tree

dfs and similar, trees

Police Patrol

greedy, implementation, math, ternary search

Match & Catch

dp, string suffix structures, strings

Checkposts

dfs and similar, graphs, two pointers

Prison Transfer

data structures, implementation

Police Recruits

implementation

Sereja and Mirroring

implementation

Sereja and Mugs

implementation

Sereja and Sets

dp

Sereja and Squares

binary search, data structures, hashing

Sereja and Two Sequences

data structures, dp

Sereja and Table

bitmasks, greedy

Sereja and Swaps

brute force, sortings

Colored Jenga

dfs and similar, dp, probabilities

Biathlon Track

binary search, brute force, constructive algorithms, data structures, dp

Magic Formulas

math

Megacity

binary search, greedy, implementation, sortings

Squats

implementation

Bug in Code

binary search, data structures, sortings

Pasha and Hamsters

constructive algorithms, implementation

Playing the ball

geometry

Cup Trick

data structures

Bug in Code

data structures, graphs, implementation, two pointers

Online Meeting

implementation

Start Up

implementation

Tricky Password

data structures

Big Problems for Organizers

data structures, graphs, trees

Square Table

constructive algorithms, math, probabilities

Cunning Gena

bitmasks, dp, greedy, sortings