Escape Through Leaf

data structures, dp, geometry

Team Work

combinatorics, dp, math

Tree

binary search, dp, trees

Permutation Cycle

brute force, constructive algorithms

Recursive Queries

binary search, data structures, dfs and similar

Palindromic Supersequence

constructive algorithms

Laboratory Work

implementation, math

World Cup

constructive algorithms, implementation

Friends Meeting

brute force, greedy, implementation, math

Coins Exhibition

data structures, dp, math

Game with Tokens

data structures, games, implementation

Teodor is not a liar!

data structures, dp

Game with String

implementation, probabilities, strings

Peculiar apple-tree

dfs and similar, graphs, trees

Пограничные врата

Красивая команда

*special problem, combinatorics, math

Места в самолёте

*special problem, implementation

Прокат велосипедов

*special problem, greedy, implementation

Autocompletion

*special problem, strings, trees

Dependency management

*special problem, graphs, implementation

Chat

*special problem, dp

Login Verification

*special problem, strings

BuberPool Taxi Optimization

*special problem, interactive

Segments

data structures

A Vital Problem

Endless Roses Most Beautiful

Large Bouquets

Mobile Communications

Merge Equal Elements

constructive algorithms, data structures

Choose Place

Is This a Zebra?

implementation

Add Points

math, number theory

2-3-numbers

implementation, math

Parametric Circulation

binary search, flows

May Holidays

data structures, trees

Aztec Catacombs

constructive algorithms

Big Secret

constructive algorithms, math

Resource Distribution

binary search, implementation, sortings

Stairs and Elevators

binary search

Minimal Subset Difference

dp

Wardrobe

dp, greedy

Contact ATC

Riverside Curio

data structures, dp, greedy

Three-level Laser

binary search, greedy, two pointers

Mystical Mosaic

greedy, implementation

Public Service

constructive algorithms, graphs, trees

Perpetual Subtraction

fft, math, matrices

Picking Strings

constructive algorithms, implementation, strings

Perfect Security

data structures, greedy, strings, trees

Producing Snow

binary search, data structures

Primal Sport

math, number theory

Divisibility

constructive algorithms, dp, greedy, number theory

Birds

dp

Robot Vacuum Cleaner

greedy, sortings

Cave Painting

brute force, number theory

Magic Forest

brute force

Cloning Toys

implementation

Labyrinth-14

Labyrinth-13

Labyrinth-12

Labyrinth-11

Labyrinth-10

Labyrinth-9

Labyrinth-8

Labyrinth-7

Labyrinth-6

Labyrinth-5

Labyrinth-4

Labyrinth-3

Labyrinth-2

Labyrinth-1

List Of Integers

binary search, bitmasks, brute force, combinatorics, math, number theory

SUM and REPLACE

brute force, data structures, dsu, number theory

Connected Components?

data structures, dfs and similar, dsu, graphs

Tanks

dp, greedy, implementation

Swap Adjacent Elements

dfs and similar, greedy, math, sortings, two pointers

Tea Queue

implementation

Water The Garden

implementation

A Game With Numbers

games, graphs, shortest paths

Congruence Equation

chinese remainder theorem, math, number theory

Substring

dfs and similar, dp, graphs

Seat Arrangements

brute force, implementation

Perfect Number

binary search, brute force, dp, implementation, number theory

Supermarket

brute force, greedy, implementation

Radio Station

implementation, strings

Eleven

brute force, implementation

Upside Down

data structures, string suffix structures, strings, trees

Stranger Trees

dp, math, matrices, trees

Pollywog

combinatorics, dp, matrices

MADMAX

dfs and similar, dp, games, graphs

The Monster

dp, greedy, implementation, math

Jamie and Tree

data structures, trees

Jamie and To-do List

data structures, interactive, trees

Jamie and Interesting Graph

constructive algorithms, graphs, shortest paths

Jamie and Binary Sequence (changed after round)

bitmasks, greedy, math

Jamie and Alarm Snooze

brute force, implementation, math

Coprime Arrays

math, number theory

Imbalance Value of a Tree

data structures, dsu, graphs, trees

Physical Education Lessons

data structures, implementation, sortings

Almost Acyclic Graph

dfs and similar, graphs