Shawarma Tent

brute force, geometry, greedy, implementation

New Skateboard

dp

Anji's Binary Tree

dfs and similar, dp, trees

Intense Heat

brute force, implementation, math

Substring Removal

combinatorics, math, strings

Accordion

greedy, implementation

Queries on a String

implementation, strings

Snow Footprints

greedy, implementation

Salyg1n and the MEX Game

constructive algorithms, data structures, games, greedy, interactive

Bit Flipping

bitmasks, constructive algorithms, greedy, strings

Colorful Table

binary search, data structures, dp, implementation, math, two pointers

Vasya and Isolated Vertices

constructive algorithms, graphs

Wet Shark and Bishops

combinatorics, implementation

Swords

math

Plus from Picture

dfs and similar, implementation, strings

Rubik's Cube Coloring (easy version)

combinatorics, math

Summer sell-off

greedy, sortings

Fox Dividing Cheese

math, number theory

Build a Contest

data structures, implementation

Packets

constructive algorithms, greedy, math

Increase and Decrease

greedy, math

Charmed by the Game

brute force, math

Binary String Constructing

constructive algorithms

Archer

math, probabilities

Fill in the Matrix

constructive algorithms, implementation

Blocks

greedy, math

Tiles

combinatorics, greedy, math

Cloning Toys

implementation

Summarize to the Power of Two

brute force, greedy, implementation

New Year's Eve

bitmasks, constructive algorithms, number theory

Insert Zero and Invert Prefix

constructive algorithms

Multiplication Table

math, number theory

PolandBall and Forest

dfs and similar, dsu, graphs, interactive, trees

Minimize Distance

greedy

Ice and Fire

constructive algorithms, dp, greedy

Seraphim the Owl

dp, greedy

Planet Lapituletti

brute force, implementation

Strongly Composite

greedy, math, number theory

Interview

binary search, implementation, interactive

Nice Garland

brute force, greedy, math

Ehab and a Special Coloring Problem

constructive algorithms, number theory

Complete the Word

greedy, two pointers

Coins

greedy

Little Elephant and Problem

implementation, sortings

Jatayu's Balanced Bracket Sequence

data structures, dsu, graphs, greedy

Letters Shop

binary search, implementation, strings

Qingshan Loves Strings 2

constructive algorithms, greedy, implementation

Reorder the Array

combinatorics, data structures, math, sortings, two pointers

Many Equal Substrings

implementation, strings

Constructive Problem

brute force, greedy

Meme Problem

binary search, math

Yarik and Musical Notes

hashing, math, number theory

Insert and Equalize

brute force, constructive algorithms, greedy, math, number theory

Unusual Competitions

greedy

Chat Online

implementation

Beautiful Numbers

data structures, implementation, math, two pointers

Permutation Operations

constructive algorithms, greedy, implementation, math

Gardener and the Array

bitmasks, constructive algorithms

Increasing Subsequence (easy version)

greedy

Prime Matrix

binary search, brute force, math, number theory

Madoka and Childish Pranks

constructive algorithms, greedy

Scoring Subsequences

binary search, greedy, math, two pointers

Take Your Places!

implementation

Little Alawn's Puzzle

combinatorics, dp, dsu, graphs, math

Vertical Paths

graphs, implementation, trees

Good String

greedy

Divisor Chain

bitmasks, constructive algorithms, math, number theory

Equator

implementation

Twist the Permutation

brute force, constructive algorithms, implementation, math

Dreaming of Freedom

greedy, math, number theory

Bakery

graphs

Game of Ball Passing

greedy, implementation

From S To T

implementation, strings

Binary Path

dp, greedy, implementation

The Forbidden Permutation

greedy, math

Cow and Friend

geometry, greedy, math

Hamiltonian Wall

dp, implementation

Array Elimination

bitmasks, greedy, math, number theory

Kill `Em All

greedy, sortings

Party

brute force, graphs

Vlad and Division

bitmasks, greedy

Verse For Santa

binary search, brute force, implementation

Ian and Array Sorting

greedy, math

Easy Number Challenge

implementation, number theory

Deep Down Below

binary search, greedy, sortings

Game with Multiset

binary search, bitmasks, brute force, greedy

Elemental Decompress

constructive algorithms, greedy, implementation, sortings

Tear It Apart

brute force, implementation, math, strings

Money Trees

binary search, greedy, math, two pointers

Make It Permutation

brute force, greedy, sortings

Queue Sort

greedy, implementation, sortings

Array Sharpening

greedy, implementation

WOW Factor

dp, strings

Reverse String

brute force, dp, hashing, implementation, strings

Duff in Love

math

Arrow Path

brute force, constructive algorithms, dfs and similar, dp, graphs, shortest paths

Lose it!

dp, greedy, implementation

Move and Turn

dp, math

Appleman and Card Game

greedy

White-Black Balanced Subtrees

dfs and similar, dp, graphs, trees