Dances (Easy version)

binary search, greedy, two pointers

You Are So Beautiful

data structures

Look Back

bitmasks, greedy

In Love

data structures, greedy

Card Game

brute force, greedy

Sets and Union

bitmasks, brute force, constructive algorithms, greedy

Minimum Maximum Distance

dfs and similar, dp, graphs, shortest paths, trees

Block Sequence

dp

Divide and Equalize

math, number theory

Sum of XOR Functions

bitmasks, combinatorics, divide and conquer, dp, math

Make it Alternating

combinatorics, dp, greedy

Iva & Pav

binary search, bitmasks, data structures, greedy

Reverse Madness

data structures, greedy

Effects of Anti Pimples

combinatorics, number theory, sortings

Jellyfish and Mex

dp

Jellyfish and Green Apple

bitmasks, greedy, math, number theory

Mad City

dfs and similar, dsu, games, graphs, shortest paths, trees

ABBC or BACB

constructive algorithms, greedy

Money Trees

binary search, greedy, math, two pointers

Data Structures Fan

binary search, bitmasks, data structures, dp

Colorful Table

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

Candy Party (Easy Version)

bitmasks, constructive algorithms, graphs, greedy, implementation, math

Fill in the Matrix

constructive algorithms, implementation

Salyg1n and the MEX Game

constructive algorithms, data structures, games, greedy, interactive

Battling with Numbers

combinatorics, math, number theory

Matrix Cascade

brute force, constructive algorithms, data structures, dp, greedy, math

Divisor Chain

bitmasks, constructive algorithms, math, number theory

Two-Colored Dominoes

constructive algorithms, greedy

Kolya and Movie Theatre

constructive algorithms, data structures, greedy

Ice Cream Balls

binary search, combinatorics, constructive algorithms, math

Queries for the Array

data structures, dfs and similar, implementation, strings, trees

Game on Permutation

data structures, dp, games, greedy

The Walkway

brute force, dp, greedy, math, number theory

Sum and Product

binary search, data structures, math

Power of Points

math, sortings

Strong Vertices

math, sortings, trees

To Become Max

binary search, brute force, data structures, dp

Dual (Easy Version)

constructive algorithms, math

Nastya and Potions

dfs and similar, dp, graphs, sortings

Prefix Permutation Sums

implementation, math

The Third Letter

dfs and similar, dsu, graphs, greedy, implementation

The Morning Star

combinatorics, data structures, geometry, implementation, math, sortings

We Were Both Children

brute force, implementation, math, number theory

Array Painting

constructive algorithms, greedy, two pointers

Binary String Copying

binary search, brute force, data structures, hashing, strings

Vampiric Powers, anyone?

bitmasks, brute force, dp, greedy

Rudolf and Snowflakes (simple version)

brute force, implementation, math

Strong Password

binary search, dp, greedy, strings

Row Major

constructive algorithms, greedy, math, number theory, strings

Particles

dp, greedy, implementation, math

Tracking Segments

binary search, brute force, data structures, two pointers

Tenzing and Balls

dp

Character Blocking

data structures, hashing, implementation

Wooden Toy Festival

binary search, greedy, sortings

Insert Zero and Invert Prefix

constructive algorithms

No Prime Differences

constructive algorithms, math, number theory

Bracket Coloring

constructive algorithms, greedy

k-th equality

brute force, implementation, math

Ira and Flamenco

combinatorics, constructive algorithms, data structures, implementation, math, sortings, two pointers

Round Dance

dfs and similar, dsu, graphs, shortest paths

Flipper

brute force, constructive algorithms, greedy

Copil Copac Draws Trees

dfs and similar, dp, graphs, trees

Don't Blame Me

bitmasks, combinatorics, dp, math

Hits Different

data structures, dp, implementation, math

Forever Winter

dfs and similar, graphs, math

Running Miles

brute force, dp, greedy

Dreaming of Freedom

greedy, math, number theory

LuoTianyi and the Show

greedy, implementation

Strongly Composite

greedy, math, number theory

Magic Triples (Easy Version)

brute force, data structures, math, number theory

Gardening Friends

brute force, dfs and similar, dp, graphs, trees

Making Anti-Palindromes

greedy, math, strings

Tear It Apart

brute force, implementation, math, strings

Constructive Problem

brute force, greedy

Almost Increasing Subsequence

binary search, data structures, greedy

Ian and Array Sorting

greedy, math

Search in Parallel

constructive algorithms, greedy, sortings

Long Legs

brute force, math

Living Sequence

binary search, dp, math, number theory

Umka and a Long Flight

constructive algorithms, implementation, math

Climbing the Tree

binary search, math

Make It Permutation

brute force, greedy, sortings

Sum on Subarrays

constructive algorithms, greedy, math

Bouncy Ball

brute force, dfs and similar, implementation

Interview

binary search, implementation, interactive

Sequence Master

brute force, constructive algorithms, math

Place for a Selfie

binary search, data structures, geometry, math

Pull Your Luck

brute force, greedy, math, number theory

The Very Beautiful Blanket

bitmasks, constructive algorithms

Unforgivable Curse (hard version)

brute force, constructive algorithms, dfs and similar, dsu, graphs, greedy, strings

Unforgivable Curse (easy version)

brute force, constructive algorithms, dsu, graphs, greedy, strings

Double Lexicographically Minimum

greedy, strings

Shocking Arrangement

constructive algorithms, greedy, math

Candy Store

greedy, math, number theory

Li Hua and Chess

constructive algorithms, greedy, interactive

Maximum Set

binary search, math

Triangle Coloring

combinatorics, math

Tea Tasting

binary search, data structures, implementation

Scoring Subsequences

binary search, greedy, math, two pointers

Fixed Prefix Permutations

binary search, bitmasks, data structures, hashing, math, sortings