Shop Game

data structures, greedy, math, sortings

Division + LCP (hard version)

binary search, brute force, data structures, dp, hashing, math, string suffix structures, strings

Division + LCP (easy version)

binary search, data structures, dp, hashing, string suffix structures, strings

Equal XOR Segments

binary search, data structures

Chain Reaction

binary search, data structures, dsu, greedy, implementation, math, number theory

Kirill and Mushrooms

data structures, sortings

Learning to Paint

binary search, data structures, dfs and similar, dp, greedy, implementation, sortings

Pinball

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

Messenger in MAC

binary search, brute force, constructive algorithms, data structures, dp, greedy, sortings

Feed Cats

data structures, dp, sortings

Lonely Mountain Dungeons

brute force, data structures, greedy, math, ternary search

Microcycle

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

Space Harbour

data structures, implementation, math, sortings

Count Paths

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

Slimes

binary search, constructive algorithms, data structures, greedy, two pointers

Berserk Monsters

brute force, data structures, dsu, implementation, math

Mischievous Shooter

brute force, data structures, divide and conquer, dp, implementation

Sum of Progression

brute force, data structures, dp, implementation, math

01 Tree

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

Blocking Elements

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

Array Collapse

data structures, divide and conquer, dp, trees

Accumulator Apex

data structures, implementation, sortings

Maximize The Value

data structures, sortings

Cyclic MEX

data structures, implementation, math, two pointers

Set To Max (Hard Version)

constructive algorithms, data structures, divide and conquer, greedy, implementation, sortings

Collapsing Strings

data structures, strings, trees

Robot Queries

binary search, data structures, dp, implementation

Unusual Entertainment

data structures, dfs and similar, dsu, shortest paths, sortings, trees, two pointers

Sofia and Strings

data structures, greedy, sortings, strings, two pointers

Permutation Sorting

data structures, sortings

XOR Construction

bitmasks, constructive algorithms, data structures, math, string suffix structures, trees

A Growing Tree

data structures, dfs and similar, trees

Doremy's Drying Plan (Easy Version)

brute force, data structures, dp, greedy, sortings

Monocarp and the Set

combinatorics, data structures, math

Anya and the Mysterious String

binary search, data structures

Grouped Carriages

binary search, data structures, dp, flows, greedy

Guess Game

bitmasks, data structures, games, math, probabilities, sortings, strings, trees

The Great Equalizer

binary search, data structures, math, sortings

Andrey and Escape from Capygrad

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

Trees and Segments

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

Vlad and the Mountains

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

Professor Higashikata

data structures, dsu, greedy, implementation, strings

Rating System

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

Omsk Metro (simple version)

data structures, dfs and similar, dp, graphs, greedy, math, trees

Fill the Matrix

data structures, greedy, math

Pairs of Segments

data structures, greedy, sortings, two pointers

Ball Sorting

data structures, dp, sortings

Bracket Walk

data structures, greedy, strings

Survey in Class

brute force, data structures, greedy, implementation, sortings

Magic Triples (Hard Version)

brute force, data structures, math, number theory

Vlad and the Nice Paths (hard version)

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

Monsters

brute force, data structures, dfs and similar, dsu, graphs, greedy

Petya, Petya, Petr, and Palindromes

binary search, brute force, data structures, two pointers

Tree Master

brute force, data structures, dfs and similar, trees

The way home

binary search, data structures, dp, graphs, greedy, shortest paths, sortings

Music Festival

binary search, data structures, dp, greedy, sortings

Buying gifts

data structures, greedy, sortings

Hot Start Up (hard version)

data structures, dp

Li Hua and Tree

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

Maximum Subarray

data structures, dp, greedy, two pointers

Explosions?

binary search, data structures, dp, greedy, math

Sum Over Zero

data structures, dfs and similar, dp

Monsters (hard version)

data structures, greedy

Hossam and (sub-)palindromic tree

brute force, data structures, dfs and similar, dp, strings, trees

Koxia and Game

constructive algorithms, data structures, dfs and similar, dsu, flows, games, graph matchings, graphs, implementation

Count Binary Strings

data structures, dp

Restore the Permutation

binary search, constructive algorithms, data structures, greedy, math

All Possible Digits

binary search, data structures, greedy, math, number theory

Yet Another Problem

binary search, bitmasks, constructive algorithms, data structures

Multi-Colored Segments

binary search, data structures, math, sortings

Hanging Hearts

constructive algorithms, data structures, dfs and similar, dp, greedy, trees

Reset K Edges

binary search, data structures, dfs and similar, graphs, greedy, trees

Permutation Addicts

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

Slime Escape

data structures, dp, greedy, two pointers

Field Photography

bitmasks, data structures, sortings

Burenka and Traditions (hard version)

data structures, dp, greedy

Robot in a Hallway

data structures, dp, greedy, implementation, ternary search

Empty Graph

binary search, constructive algorithms, data structures, greedy, shortest paths

Rain

binary search, brute force, data structures, geometry, greedy, implementation, math

Difference Array

brute force, data structures, implementation, sortings

Passable Paths (hard version)

data structures, dfs and similar, trees

Permutation Restoration

binary search, data structures, greedy, math, sortings, two pointers

Permutation Graph

binary search, constructive algorithms, data structures, divide and conquer, greedy, shortest paths

Max GEQ Sum

binary search, constructive algorithms, data structures, divide and conquer, implementation, two pointers

Count the Trains

binary search, data structures, greedy, sortings

Lena and Matrix

data structures, dp, geometry, shortest paths

MEX vs DIFF

binary search, brute force, constructive algorithms, data structures, greedy, two pointers

Desktop Rearrangement

data structures, greedy, implementation

Optimal Partition

data structures, dp

Progressions Covering

data structures, greedy

Promising String (hard version)

data structures, implementation, math, strings

Reverse Sort Sum

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

Nearest Excluded Points

binary search, data structures, dfs and similar, graphs, shortest paths

Counting Shortcuts

data structures, dfs and similar, dp, graphs, shortest paths

Rescheduling the Exam

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

Tyler and Strings

combinatorics, data structures, implementation

Integral Array

brute force, constructive algorithms, data structures, math

Expand the Path

brute force, combinatorics, data structures, implementation, math

Anonymity Is Important

binary search, brute force, data structures, dsu, greedy, sortings

Big Brush

constructive algorithms, data structures, greedy, implementation