Merging Two Decks

constructive algorithms, greedy

Triminoes

constructive algorithms, greedy

T-decomposition

dfs and similar, graphs, greedy, trees

Martian Luck

math, number theory

Director

constructive algorithms, greedy

Mirror Box

geometry, implementation

Trails (Medium)

dp, matrices

Need For Brake

binary search, greedy, sortings

Playing with Superglue

combinatorics, constructive algorithms

Morning run

binary search, math, two pointers

Ancient Berland Hieroglyphs

two pointers

Fractal Detector

dp, hashing

Mad Joe

brute force

Stepan's Series

*special problem, dp

Bars

*special problem, binary search

Smart Beaver and Resolving Collisions

The Beaver's Problem - 2

Teams

*special problem, binary search, greedy, math

Mobile Communications

Dune II: Battle For Arrakis

*special problem, data structures, greedy, math

Chess Match

*special problem

Beaver's Calculator 1.0

greedy

Double Permutation Inc.

*special problem, binary search, greedy

Kotlinforces

*special problem, constructive algorithms, dp

Domain

*special problem, expression parsing

Build Railway Stations

*special problem, greedy, trees

The Beaver's Problem - 3

Tree Diameter

interactive, trees

Array Sum

*special problem

Counting Fridays

*special problem

The Beaver's Problem - 3

Divisibility Check

*special problem

Date Change

*special problem

Truncatable primes

*special problem

Non-decimal sum

*special problem

Ant colony

data structures, math, number theory

Tree Painting

dfs and similar, dp, trees

Minimum spanning tree for each edge

data structures, dfs and similar, dsu, graphs, trees

Ciel the Commander

constructive algorithms, dfs and similar, divide and conquer, greedy, trees

Maximum Value

binary search, math, sortings, two pointers

Max Median

binary search, data structures, dp

A and B and Lecture Rooms

binary search, data structures, dfs and similar, dp, trees

Blood Cousins

binary search, data structures, dfs and similar, trees

Zero Remainder Sum

dp

Connected Components?

data structures, dfs and similar, dsu, graphs

Array Shrinking

dp, greedy

Water Tree

data structures, dfs and similar, graphs, trees

The Number of Pairs

dp, math, number theory

Ancient Berland Circus

geometry, math

Errich-Tac-Toe (Easy Version)

constructive algorithms, math

Omkar and Circle

brute force, dp, games, greedy

New Year Tree

bitmasks, data structures, trees

Civilization

dfs and similar, dp, dsu, ternary search, trees

Police Stations

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

Coloring Edges

constructive algorithms, dfs and similar, graphs

Weights Distributing

brute force, graphs, greedy, shortest paths, sortings

Round Subset

dp, math

Kalila and Dimna in the Logging Industry

dp, geometry

GCD of an Array

brute force, data structures, hashing, implementation, math, number theory, sortings, two pointers

Remainder Problem

brute force, data structures, implementation

Restorer Distance

binary search, greedy, math, sortings, ternary search

Xor-Paths

bitmasks, brute force, dp, meet-in-the-middle

Binary Subsequence Rotation

binary search, constructive algorithms, data structures, greedy

Pokémon Army (hard version)

data structures, divide and conquer, dp, greedy, implementation

Moving to the Capital

dfs and similar, dp, graphs, shortest paths

Gift Set

binary search, greedy, math, ternary search

Swaps Again

constructive algorithms, implementation, sortings

Binary Median

binary search, bitmasks, brute force, constructive algorithms

Subsequences of Length Two

dp, strings

Nearest Beautiful Number (hard version)

bitmasks, brute force, constructive algorithms, dfs and similar, dp, greedy

Trash Problem

data structures, implementation

Reducing Delivery Cost

brute force, graphs, shortest paths

Cut

binary search, data structures, dp, graphs, number theory, two pointers

Segment Intersections

brute force, greedy, implementation, math

Ehab's Last Corollary

constructive algorithms, dfs and similar, graphs, greedy, implementation, trees

Magic Gems

dp, math, matrices

The Winter Hike

constructive algorithms, greedy, math

Two Arrays

binary search, brute force, combinatorics, constructive algorithms, dp, two pointers

Present

binary search, bitmasks, constructive algorithms, data structures, math, sortings

Olya and Energy Drinks

data structures, dfs and similar, graphs, shortest paths

We Need More Bosses

dfs and similar, graphs, trees

Painting the Array II

constructive algorithms, data structures, dp, greedy, implementation

Boring Segments

data structures, sortings, trees, two pointers

Valid Sets

dfs and similar, dp, math, trees

Destroying Roads

constructive algorithms, graphs, shortest paths

Guess The Maximums

binary search, implementation, interactive, math

Array Partition

binary search, data structures, greedy, two pointers

Martial Arts Tournament

binary search, brute force, greedy, math

Rarity and New Dress

dfs and similar, dp, implementation, shortest paths

Anton and Tree

dfs and similar, dp, trees

Segment Tree

data structures, dsu, graphs, trees

Challenges in school №41

brute force, constructive algorithms, games, graphs, greedy, implementation, sortings

Divisibility by 25

brute force, greedy

Divan and Kostomuksha (easy version)

dp, number theory

Water Balance

data structures, geometry, greedy

Watching Fireworks is Fun

data structures, dp, math

01 Tree

constructive algorithms, data structures, dsu, greedy, sortings, trees

Height All the Same

combinatorics, constructive algorithms, math, matrices

Soldier and Traveling

flows, graphs, math

Optimal Partition

data structures, dp