Number of Subsequences

combinatorics, dp, strings

Pokémon Army (hard version)

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

Decryption

constructive algorithms, implementation, math, number theory

Trash Problem

data structures, implementation

XOR Inverse

bitmasks, data structures, divide and conquer, dp, greedy, math, sortings, strings, trees

Make Them Equal

constructive algorithms, greedy, math

XOR-gun

bitmasks, brute force, constructive algorithms

Solo mid Oracle

greedy, math, ternary search

Grime Zoo

brute force, greedy, implementation, strings

Subsequences of Length Two

dp, strings

Searchlights

binary search, brute force, data structures, dp, implementation, sortings, two pointers

Weights Division (easy version)

data structures, dfs and similar, greedy, trees

Rarity and New Dress

dfs and similar, dp, implementation, shortest paths

Omkar and Duck

bitmasks, constructive algorithms, interactive, math

505

bitmasks, brute force, constructive algorithms, dp, greedy, implementation

Segment Intersections

brute force, greedy, implementation, math

Captain Flint and Treasure

data structures, dfs and similar, graphs, greedy, implementation, trees

Village (Minimum)

*special problem, dp, greedy, trees

Graph

*special problem, binary search, dfs and similar, dp, math, ternary search

Directing Edges

constructive algorithms, dfs and similar, graphs

Berserk And Fireball

constructive algorithms, greedy, implementation, math, two pointers

Choosing flowers

binary search, brute force, data structures, dfs and similar, dp, greedy, sortings, two pointers

Omkar and Circle

brute force, dp, games, greedy

Binary Subsequence Rotation

binary search, constructive algorithms, data structures, greedy

Odd-Even Subsequence

binary search, dp, dsu, greedy, implementation

Flying Sort (Easy Version)

dp, greedy, two pointers

Two Arrays

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

Two Divisors

constructive algorithms, math, number theory

Swaps Again

constructive algorithms, implementation, sortings

Ehab's Last Corollary

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

Tree Shuffling

dfs and similar, dp, greedy, trees

Guess The Maximums

binary search, implementation, interactive, math

Binary Median

binary search, bitmasks, brute force, constructive algorithms

Modular Stability

combinatorics, math, number theory

Yet Another Yet Another Task

data structures, dp, implementation, two pointers

Restorer Distance

binary search, greedy, math, sortings, ternary search

Graph Coloring

dfs and similar, dp, graphs

Not So Simple Polygon Embedding

binary search, brute force, geometry, math

Orac and Game of Life

dfs and similar, graphs, implementation, shortest paths

Orac and Medians

constructive algorithms, greedy, math

Dune II: Battle For Arrakis

*special problem, data structures, greedy, math

Monopole Magnets

constructive algorithms, dfs and similar, dsu, graphs

Weights Distributing

brute force, graphs, greedy, shortest paths, sortings

Challenges in school №41

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

Height All the Same

combinatorics, constructive algorithms, math, matrices

Present

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

World of Darkraft: Battle for Azathoth

brute force, data structures, sortings

Nash Matrix

constructive algorithms, dfs and similar, graphs, implementation

Array Shrinking

dp, greedy

Three Integers

brute force, math

1-Trees and Queries

data structures, dfs and similar, shortest paths, trees

Time to Run

constructive algorithms, graphs, implementation

Water Balance

data structures, geometry, greedy

Berland Beauty

constructive algorithms, dfs and similar, greedy, sortings, trees

String Coloring (hard version)

data structures, dp

Three Paths on a Tree

dfs and similar, dp, greedy, trees

Messenger Simulator

data structures

Minimax Problem

binary search, bitmasks, dp

New Year and Conference

binary search, data structures, hashing, sortings

Jeremy Bearimy

dfs and similar, graphs, greedy, trees

Segment Tree

data structures, dsu, graphs, trees

Common Number

binary search, combinatorics, dp, math

Portals

data structures, dp, greedy, implementation, sortings

Domino for Young

dp, greedy, math

Key Storage

combinatorics, math

Spaceship Solitaire

data structures, greedy, implementation

Decreasing Debts

constructive algorithms, data structures, graphs, greedy, implementation, math, two pointers

Beautiful Mirrors

data structures, dp, math, probabilities

Editor

data structures, implementation

The Contest

data structures, dp, greedy

Equalizing Two Strings

constructive algorithms, sortings, strings

Yet Another Division Into Teams

dp, greedy, sortings

Send Boxes to Alice (Hard Version)

constructive algorithms, greedy, math, number theory, ternary search, two pointers

Addition Robot

data structures, math, matrices

Performance Review

data structures

Wires

dfs and similar, graphs, greedy

Trip to Saint Petersburg

data structures

The World Is Just a Programming Task (Easy Version)

brute force, dp, greedy, implementation

Minimizing Difference

binary search, constructive algorithms, greedy, sortings, ternary search, two pointers

The Football Season

brute force, math, number theory

Balanced Playlist

binary search, data structures, implementation

Special Permutations

math

Paint the Tree

dp, sortings, trees

Sequence Sorting

dp, greedy, two pointers

Harvester

implementation

The Light Square

2-sat, dfs and similar, greedy

Coloring Edges

constructive algorithms, dfs and similar, graphs

Wi-Fi

data structures, dp, greedy

Petya and Construction Set

constructive algorithms, graphs, math, sortings, trees

Unstable String Sort

data structures, dfs and similar, dsu, graphs, greedy, implementation, strings

Double Permutation Inc.

*special problem, binary search, greedy

Teams

*special problem, binary search, greedy, math

Kamil and Making a Stream

math, number theory, trees

Into Blocks (easy version)

data structures, dsu, greedy, implementation, two pointers

Rotate Columns (easy version)

bitmasks, brute force, dp, greedy, sortings

Remainder Problem

brute force, data structures, implementation

Kirk and a Binary String (hard version)

data structures, greedy, math, strings

Kirk and a Binary String (easy version)

brute force, greedy, strings

Complete the Projects (easy version)

greedy

You Are Given a WASD-string...

brute force, data structures, dp, greedy, implementation, math, strings