Paprika and Permutation

binary search, greedy, math, sortings

Good Subarrays (Easy Version)

binary search, data structures, schedules, two pointers

Masha and a Beautiful Tree

dfs and similar, divide and conquer, graphs, sortings, trees

Lucky Numbers (easy)

binary search, bitmasks, brute force

Prefix Permutation Sums

implementation, math

Long Number

greedy

Sets and Union

bitmasks, brute force, constructive algorithms, greedy

Make it Increasing

brute force, greedy, math

Inversion Graph

data structures, dsu, graphs, math

Make Nonzero Sum (easy version)

constructive algorithms, dp, greedy

White-Black Balanced Subtrees

dfs and similar, dp, graphs, trees

Madoka and Formal Statement

greedy

Nice Matrix

greedy, implementation, math

WOW Factor

dp, strings

Queue Sort

greedy, implementation, sortings

Money Trees

binary search, greedy, math, two pointers

Appleman and Card Game

greedy

Move and Turn

dp, math

Make It Permutation

brute force, greedy, sortings

Lose it!

dp, greedy, implementation

Vlad and Division

bitmasks, greedy

Duff in Love

math

Reverse String

brute force, dp, hashing, implementation, strings

Game with Multiset

binary search, bitmasks, brute force, greedy

Array Sharpening

greedy, implementation

Tear It Apart

brute force, implementation, math, strings

Elemental Decompress

constructive algorithms, greedy, implementation, sortings

Deep Down Below

binary search, greedy, sortings

Ian and Array Sorting

greedy, math

Easy Number Challenge

implementation, number theory

Array Elimination

bitmasks, greedy, math, number theory

Verse For Santa

binary search, brute force, implementation

Binary Path

dp, greedy, implementation

Kill `Em All

greedy, sortings

Hamiltonian Wall

dp, implementation

Party

brute force, graphs

The Forbidden Permutation

greedy, math

Cow and Friend

geometry, greedy, math

From S To T

implementation, strings

Dreaming of Freedom

greedy, math, number theory

Game of Ball Passing

greedy, implementation

Bakery

graphs

Twist the Permutation

brute force, constructive algorithms, implementation, math

Divisor Chain

bitmasks, constructive algorithms, math, number theory

Gardener and the Array

bitmasks, constructive algorithms

Good String

greedy

Vertical Paths

graphs, implementation, trees

Scoring Subsequences

binary search, greedy, math, two pointers

Equator

implementation

Little Alawn's Puzzle

combinatorics, dp, dsu, graphs, math

Seraphim the Owl

dp, greedy

Prime Matrix

binary search, brute force, math, number theory

Take Your Places!

implementation

Insert and Equalize

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

Permutation Operations

constructive algorithms, greedy, implementation, math

Madoka and Childish Pranks

constructive algorithms, greedy

Increasing Subsequence (easy version)

greedy

Yarik and Musical Notes

hashing, math, number theory

Chat Online

implementation

Beautiful Numbers

data structures, implementation, math, two pointers

Permutation Game

brute force, dfs and similar, games, graphs, greedy, math

Unusual Competitions

greedy

Qingshan Loves Strings 2

constructive algorithms, greedy, implementation

Constructive Problem

brute force, greedy

Meme Problem

binary search, math

Jatayu's Balanced Bracket Sequence

data structures, dsu, graphs, greedy

Letters Shop

binary search, implementation, strings

Many Equal Substrings

implementation, strings

Reorder the Array

combinatorics, data structures, math, sortings, two pointers

Interview

binary search, implementation, interactive

Coins

greedy

Complete the Word

greedy, two pointers

Little Elephant and Problem

implementation, sortings

Ehab and a Special Coloring Problem

constructive algorithms, number theory

Nice Garland

brute force, greedy, math

Strongly Composite

greedy, math, number theory

PolandBall and Forest

dfs and similar, dsu, graphs, interactive, trees

Planet Lapituletti

brute force, implementation

Ice and Fire

constructive algorithms, dp, greedy

Minimize Distance

greedy

Multiplication Table

math, number theory

Tiles

combinatorics, greedy, math

New Year's Eve

bitmasks, constructive algorithms, number theory

Insert Zero and Invert Prefix

constructive algorithms

Summarize to the Power of Two

brute force, greedy, implementation

Cloning Toys

implementation

Fill in the Matrix

constructive algorithms, implementation

Blocks

greedy, math

Archer

math, probabilities

Binary String Constructing

constructive algorithms

Plus from Picture

dfs and similar, implementation, strings

Increase and Decrease

greedy, math

Cat, Fox and the Lonely Array

binary search, bitmasks, data structures, greedy, math, two pointers

Summer sell-off

greedy, sortings

Packets

constructive algorithms, greedy, math

Fox Dividing Cheese

math, number theory

Charmed by the Game

brute force, math

Build a Contest

data structures, implementation

Rubik's Cube Coloring (easy version)

combinatorics, math

Swords

math