Divide Square

data structures, geometry, implementation, sortings

Maximum Distributed Tree

dfs and similar, dp, greedy, implementation, math, number theory, sortings, trees

Binary String To Subsequences

constructive algorithms, data structures, greedy, implementation

Two Types of Spells

binary search, data structures, greedy, implementation, math, sortings

Monster Invaders

dp, greedy, implementation

Twilight and Ancient Scroll (harder version)

dp, hashing, implementation, string suffix structures, strings, two pointers

Twilight and Ancient Scroll (easier version)

dp, hashing, implementation, string suffix structures, strings

Rarity and New Dress

dfs and similar, dp, implementation, shortest paths

Applejack and Storages

constructive algorithms, data structures, greedy, implementation

Omkar and Waterslide

greedy, implementation

Omkar and Infinity Clock

implementation, math

505

bitmasks, brute force, constructive algorithms, dp, greedy, implementation

Fix You

brute force, greedy, implementation

Segment Intersections

brute force, greedy, implementation, math

Captain Flint and Treasure

data structures, dfs and similar, graphs, greedy, implementation, trees

Columns Swaps

2-sat, dfs and similar, dsu, graphs, implementation

Removing Leaves

data structures, greedy, implementation, trees

a-Good String

bitmasks, brute force, divide and conquer, dp, implementation

Koa and the Beach (Hard Version)

constructive algorithms, dp, greedy, implementation

Mastermind

constructive algorithms, graph matchings, greedy, implementation, sortings, two pointers

Prefix Flip (Hard Version)

constructive algorithms, data structures, implementation, strings, two pointers

Merging Towers

data structures, dsu, implementation, trees

Berserk And Fireball

constructive algorithms, greedy, implementation, math, two pointers

Create The Teams

brute force, dp, greedy, implementation, sortings

Acacius and String

brute force, implementation, strings

Cyclic Shifts Sorting

brute force, constructive algorithms, implementation, sortings

Reading Books (hard version)

data structures, greedy, implementation, sortings, ternary search, two pointers

Maximum Sum on Even Positions

divide and conquer, dp, greedy, implementation

Donut Shops

greedy, implementation, math

Omkar and Completion

constructive algorithms, implementation

Raging Thunder

data structures, divide and conquer, implementation

Grid-00100

constructive algorithms, greedy, implementation

A Cookie for You

greedy, implementation, math

Odd-Even Subsequence

binary search, dp, dsu, greedy, implementation

Maximum GCD

greedy, implementation, math, number theory

DeadLee

data structures, dfs and similar, greedy, implementation, sortings

AccurateLee

greedy, implementation, strings

Lamps on a Circle

games, implementation, interactive, math

C+=

brute force, greedy, implementation, math

Task On The Board

constructive algorithms, greedy, implementation, sortings

Short Substrings

implementation, strings

Swaps Again

constructive algorithms, implementation, sortings

Solve The Maze

constructive algorithms, dfs and similar, dsu, graphs, greedy, implementation, shortest paths

Rotation Matching

constructive algorithms, data structures, greedy, implementation

Trouble Sort

constructive algorithms, implementation

Matrix Game

games, greedy, implementation

Ehab's Last Corollary

constructive algorithms, dfs and similar, graphs, greedy, implementation, trees

Guess The Maximums

binary search, implementation, interactive, math

Subsequence Hate

implementation, strings

Odd Selection

brute force, implementation, math

Johnny and Ancient Computer

implementation

Johnny and New Toy

data structures, implementation, math

Johnny and James

greedy, implementation, math, trees

Johnny and Grandmaster

greedy, implementation, math, sortings

Polygon

dp, graphs, implementation, shortest paths

Yet Another Yet Another Task

data structures, dp, implementation, two pointers

New Theatre Square

brute force, dp, greedy, implementation, two pointers

Tasty Cookie

binary search, constructive algorithms, greedy, implementation

Are You Fired?

constructive algorithms, data structures, greedy, implementation

The Best Vacation

binary search, brute force, greedy, implementation, two pointers

Count Triangles

binary search, implementation, math, two pointers

Sequence with Digits

brute force, implementation, math

Ternary String

binary search, dp, implementation, two pointers

Special Elements

brute force, implementation, two pointers

Alice, Bob and Candies

implementation

Sum of Round Numbers

implementation, math

Skier

data structures, implementation

Square?

brute force, implementation, math

A+B (Trial Problem)

implementation

Orac and Game of Life

dfs and similar, graphs, implementation, shortest paths

Phoenix and Science

binary search, constructive algorithms, greedy, implementation, math

Restore the Permutation by Sorted Segments

brute force, constructive algorithms, data structures, greedy, implementation

Nastya and Door

greedy, implementation

Nastya and Strange Generator

brute force, data structures, greedy, implementation

Filling Diamonds

brute force, dp, implementation, math

Kana and Dragon Quest game

greedy, implementation, math

Anti-Sudoku

constructive algorithms, implementation

Two Teams Composing

binary search, greedy, implementation, sortings

Minimum Euler Cycle

constructive algorithms, graphs, greedy, implementation

Level Statistics

implementation, math

Kate and imperfection

greedy, implementation, math, number theory, sortings, two pointers

Challenges in school №41

brute force, constructive algorithms, games, graphs, greedy, implementation, sortings

Eugene and an array

binary search, data structures, implementation, two pointers

Kind Anton

greedy, implementation

K-Complete Word

dfs and similar, dsu, greedy, implementation, strings

Exercising Walk

greedy, implementation, math

Jordan Smiley

*special problem, dfs and similar, geometry, implementation

Again?

*special problem, implementation

Dreamoon Likes Permutations

implementation, math

Dreamoon and Ranking Collection

implementation

Drazil Likes Heap

constructive algorithms, data structures, greedy, implementation

Dreamoon Likes Coloring

constructive algorithms, greedy, implementation, math

Ternary XOR

greedy, implementation

K-th Beautiful String

binary search, brute force, combinatorics, implementation, math

Game with Chips

constructive algorithms, implementation

Maximums

implementation, math

CopyCopyCopyCopyCopy

greedy, implementation

Sleeping Schedule

dp, implementation

Frog Jumps

binary search, data structures, dfs and similar, greedy, implementation

Yet Another Tetris Problem

implementation, number theory