BA-String

brute force, dp, greedy, implementation, math

MEX and Increments

constructive algorithms, data structures, dp, greedy, implementation, math, sortings

New Year's Problem

binary search, greedy, sortings

Singers' Tour

constructive algorithms, math

Too Many Impostors (easy version)

constructive algorithms, implementation, interactive

Representative Edges

brute force, geometry, implementation, math

Menorah

brute force, graphs, greedy, math

Divan and bitwise operations

bitmasks, combinatorics, constructive algorithms, dp, math

X-Magic Pair

math, number theory

ATM and Students

binary search, data structures, two pointers

Escape The Maze (easy version)

dfs and similar, greedy, shortest paths, trees, two pointers

Weights Assignment For Tree Edges

constructive algorithms, trees

Keshi Is Throwing a Party

binary search, greedy

Social Network

dsu, graphs, greedy, implementation, trees

Complex Market Analysis

binary search, dp, implementation, number theory, schedules, two pointers

Game Master

data structures, dfs and similar, dp, graphs, greedy, two pointers

Robot on the Board 1

implementation

Banknotes

greedy, number theory

Dominant Character

brute force, greedy, implementation, strings

Moderate Modular Mode

constructive algorithms, math, number theory

Robot Factory

bitmasks, dfs and similar

Training Session

combinatorics, data structures, geometry, implementation, math

The Number of Imposters

constructive algorithms, dfs and similar, dp, dsu, graphs

Gardener and Tree

brute force, data structures, dfs and similar, greedy, implementation, trees

Bakry and Partitioning

bitmasks, constructive algorithms, dfs and similar, dp, graphs, trees

Omkar and the Meaning of Life

constructive algorithms, greedy, interactive

Omkar and Determination

data structures, dp

Korney Korneevich and XOR (easy version)

bitmasks, dp, greedy

Vupsen, Pupsen and 0

constructive algorithms, math

Portal

brute force, data structures, dp, greedy, implementation

Array Stabilization (AND version)

brute force, graphs, math, number theory, shortest paths

Array Optimization by Deque

data structures, greedy

Productive Meeting

constructive algorithms, graphs, greedy

Ticks

greedy, implementation

Higher Order Functions

implementation, strings

Jeopardy of Dropped Balls

binary search, brute force, dsu, implementation

Divisible by Twenty-Five

brute force, dfs and similar, dp

Swaps

greedy, math, sortings

Book

binary search, brute force, data structures, dp, graphs, implementation, sortings

Fix the String

*special problem, bitmasks, dp, greedy

Sweepstake

*special problem, brute force, constructive algorithms, implementation, math

Rhyme

*special problem, implementation

Jury Meeting

combinatorics, math

Carrying Conundrum

bitmasks, combinatorics, dp, math

Seating Arrangements (hard version)

data structures, greedy, implementation, sortings, two pointers

Two Hundred Twenty One (easy version)

data structures, dp, math

Rings

constructive algorithms, math

Up the Strip (simplified version)

brute force, data structures, dp, math, number theory

Polycarp and String Transformation

binary search, implementation, sortings, strings

Mocha and Diana (Easy Version)

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

Moamen and XOR

bitmasks, combinatorics, dp, math, matrices

Take a Guess

bitmasks, constructive algorithms, interactive, math

Compressed Bracket Sequence

brute force, implementation

Say No to Palindromes

brute force, constructive algorithms, dp, strings

Diane

constructive algorithms, greedy, strings

Mikasa

binary search, bitmasks, greedy, implementation

Cobb

bitmasks, brute force, greedy, math

Backspace

dp, greedy, strings, two pointers

Array Differentiation

bitmasks, brute force, constructive algorithms, dfs and similar, dp, graphs, math

Maximize the Intersections

combinatorics, constructive algorithms, geometry, greedy, sortings

Running for Gold

combinatorics, graphs, greedy, sortings

Domino (easy version)

constructive algorithms, math

Interesting Story

greedy, sortings, strings

Wonderful Coloring - 2

binary search, constructive algorithms, data structures, greedy

Manhattan Subarrays

brute force, geometry, greedy, implementation

Integers Have Friends

binary search, data structures, divide and conquer, math, number theory, two pointers

Web of Lies

brute force, graphs, greedy

Air Conditioners

data structures, dp, implementation, shortest paths, sortings, two pointers

AquaMoon and Strange Sort

sortings

RPD and Rap Sheet (Easy Version)

bitmasks, constructive algorithms, interactive, math

Strange Function

math, number theory

Plus and Multiply

constructive algorithms, math, number theory

Great Graphs

constructive algorithms, graphs, greedy, shortest paths, sortings

PriceFixed

binary search, greedy, implementation, sortings, two pointers

Interesting Function

binary search, dp, math, number theory

Another Problem About Dividing Numbers

constructive algorithms, math, number theory

Erase and Extend (Easy Version)

binary search, brute force, dp, greedy, hashing, implementation, string suffix structures, strings, two pointers

Deleting Divisors

games, math, number theory

Diluc and Kaeya

data structures, dp, hashing, number theory

Playoff Tournament

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

Unstable String

binary search, dp, greedy, implementation, strings, two pointers

Lost Tree

constructive algorithms, interactive, trees

Secret Santa

constructive algorithms, flows, graphs, greedy, math

Kavi on Pairing Duty

combinatorics, dp, math

Parsa's Humongous Tree

dfs and similar, divide and conquer, dp, greedy, trees

Sequence Pair Weight

hashing, implementation, math

Potions (Hard Version)

data structures, greedy

Potions (Easy Version)

brute force, data structures, dp, greedy

I Hate 1111

dp, math, number theory

Armchairs

dp, flows, graph matchings, greedy

Compression and Expansion

brute force, data structures, greedy, implementation, trees

Guess the K-th Zero (Easy version)

binary search, interactive

Arranging The Sheep

greedy, math

Maximum Sum of Products

brute force, dp, implementation, math, two pointers

Berland Regional

brute force, data structures, greedy, number theory, sortings

Explorer Space

dp, graphs, shortest paths

Fillomino 2

constructive algorithms, dfs and similar, greedy, implementation

Baby Ehab Partitions Again

bitmasks, constructive algorithms, dp, math

AGAGA XOOORRR

bitmasks, brute force, dp, greedy

Phoenix and Socks

greedy, sortings, two pointers