Queries for the Array

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

Two Binary Strings

constructive algorithms, dp, greedy

Prime Deletion

constructive algorithms, math

Evaluate RBS

data structures, geometry, implementation, math, sortings

Fast Travel Text Editor

data structures, dfs and similar, graphs, shortest paths

Balanced String

dp

Game on Permutation

data structures, dp, games, greedy

Fancy Coins

binary search, brute force, greedy, math

Not a Substring

constructive algorithms, strings

Teleportation in Byteland

data structures, dfs and similar, divide and conquer, graphs, shortest paths, trees

Maximum Monogonosity

brute force, dp, math

Andrey and Escape from Capygrad

binary search, data structures, dp, dsu, greedy, sortings

Another Permutation Problem

brute force, dp, greedy, math

Olya and Game with Arrays

constructive algorithms, greedy, math, sortings

United We Stand

constructive algorithms, math, number theory

Rollbacks (Hard Version)

data structures, interactive, trees

Rollbacks (Easy Version)

brute force, data structures, dfs and similar, trees

Trees and Segments

brute force, data structures, dp, greedy, two pointers

Yet Another Permutation Problem

constructive algorithms, greedy, math, number theory

The Walkway

brute force, dp, greedy, math, number theory

Buttons

games, greedy, math

Counting Graphs

combinatorics, divide and conquer, dsu, graphs, greedy, sortings, trees

Sum and Product

binary search, data structures, math

Power of Points

math, sortings

Strong Vertices

math, sortings, trees

Assembly via Minimums

greedy, sortings

Maximum Rounding

greedy, implementation, math

Array Coloring

greedy, math

PermuTree (hard version)

bitmasks, dfs and similar, dp, fft, greedy, implementation, math, trees

PermuTree (easy version)

dfs and similar, dp, trees

More Wrong

divide and conquer, interactive

To Become Max

binary search, brute force, data structures, dp

Good Arrays

implementation, math

Tales of a Sort

implementation

Longest Divisors Interval

brute force, combinatorics, greedy, math, number theory

Dalton the Teacher

greedy, math

Mark and Spaceship

brute force, dp

Game Bundles

brute force, constructive algorithms, dp, greedy, math

Michael and Hotel

binary search, interactive, trees

Expected Destruction

combinatorics, dp, math, probabilities

Earn or Unlock

bitmasks, brute force, dp

Dual (Hard Version)

constructive algorithms, math

Dual (Easy Version)

constructive algorithms, math

Fibonaccharsis

binary search, brute force, math

Desorting

brute force, greedy, math

Panda Meetups

data structures, dp, flows

Rivalries

constructive algorithms, data structures, greedy

Miriany and Matchstick

constructive algorithms, dp, greedy

Ina of the Mountain

data structures, dp, greedy, math

Imbalanced Arrays

constructive algorithms, graphs, greedy, math, sortings, two pointers

Ntarsis' Set

binary search, math, number theory

Vlad and the Mountains

binary search, data structures, dsu, graphs, implementation, sortings, trees, two pointers

Lisa and the Martians

bitmasks, greedy, math, strings, trees

Nastya and Potions

dfs and similar, dp, graphs, sortings

Prefix Permutation Sums

implementation, math

Tiles Comeback

greedy

Parity Sort

greedy, sortings, two pointers

Escalator Conversations

brute force, constructive algorithms, 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

Cardboard for Pictures

binary search, geometry, implementation, math

Balanced Round

brute force, greedy, implementation, sortings

Word on the Paper

implementation, strings

Ten Words of Wisdom

implementation, sortings

To My Critics

implementation, sortings

XOR Partition

binary search, bitmasks, data structures, divide and conquer, greedy, trees

Max to the Right of Min

binary search, data structures, divide and conquer, dp, dsu, two pointers

Array Painting

constructive algorithms, greedy, two pointers

Binary String Copying

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

Monsters

greedy, math, sortings

Morning Sandwich

implementation, math

Vika and Wiki

binary search, bitmasks, combinatorics, divide and conquer, dp, math

Vika and Stone Skipping

brute force, implementation, math, number theory

Vika and Bonuses

binary search, brute force, math, ternary search

Vika and Price Tags

math, number theory

Vika and the Bridge

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

Vika and Her Friends

games, math

The Boss's Identity

binary search, bitmasks, data structures, dfs and similar, greedy, math, sortings

Triangle Platinum?

brute force, combinatorics, implementation, interactive, math, probabilities

Professor Higashikata

data structures, dsu, greedy, implementation, strings

Vampiric Powers, anyone?

bitmasks, brute force, dp, greedy

Hamon Odyssey

bitmasks, greedy, two pointers

The Man who became a God

greedy, sortings

Rudolf and CodeVid-23

bitmasks, dp, graphs, greedy, shortest paths

Rudolph and Mimic

constructive algorithms, implementation, interactive

Rudolf and Snowflakes (hard version)

binary search, brute force, implementation, math

Rudolf and Snowflakes (simple version)

brute force, implementation, math

Rudolph and Christmas Tree

constructive algorithms, geometry, math

Rudolf and the Another Competition

constructive algorithms, data structures, dp, greedy, sortings

Rudolph and Tic-Tac-Toe

brute force, implementation, strings

Rudolph and Cut the Rope

implementation, math

Swimmers in the Pool

dp, fft, math, number theory

Boxes and Balls

dp, implementation, math

Rating System

binary search, brute force, data structures, dp, dsu, greedy, math, two pointers

Strong Password

binary search, dp, greedy, strings

Come Together

geometry, implementation, math

Forbidden Integer

constructive algorithms, implementation, math, number theory

Multiple of Three Cycles

combinatorics, data structures, dp, dsu, math

Tree Weights

bitmasks, constructive algorithms, data structures, dfs and similar, implementation, math, matrices, number theory, trees