Voting (Easy Version)

data structures, dp, greedy

Pairwise Modulo

data structures, math

Envy

data structures, dsu, graphs

Pattern Matching

bitmasks, data structures, dfs and similar, graphs, hashing, sortings, strings

Removing Leaves

data structures, greedy, implementation, trees

Qpwoeirut and Vertices

binary search, data structures, dfs and similar, divide and conquer, dsu, greedy, trees

MEX Queries

binary search, data structures, trees

388535 (Hard Version)

bitmasks, brute force, data structures, math

Fixed Point Removal

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

Dogeforces

constructive algorithms, data structures, dfs and similar, divide and conquer, dsu, greedy, sortings, trees

Trees of Tranquillity

data structures, dfs and similar, greedy, trees

Trains and Statistic

data structures, dp, greedy

Centroids

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

Minimal Labels

data structures, dfs and similar, graphs, greedy

Almost Triple Deletions

data structures, dp, greedy

Sasha and Array

data structures, math, matrices

Xor-MST

bitmasks, constructive algorithms, data structures

Physical Education Lessons

data structures, implementation, sortings

Dominant Indices

data structures, dsu, trees

Legacy

data structures, graphs, shortest paths

A Simple Task

data structures, sortings, strings

The Child and Sequence

data structures, math

Lomsat gelral

data structures, dfs and similar, dsu, trees

Palindromic Doubles

*special problem, data structures, dp

Greedy Elevator

data structures, implementation

Cannon

data structures, geometry, sortings

Jamie and To-do List

data structures, interactive, trees

Printer

binary search, data structures, implementation, sortings

Competition

data structures, greedy

Lucky Tickets

binary search, data structures, sortings, two pointers

Heidi and the Turing Test (Medium)

data structures

Parking Lot

data structures

Maximum Control (medium)

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

Smart Cheater

data structures, math, probabilities

Maze 2D

data structures, divide and conquer

Music in Car

data structures, greedy, two pointers

Cup Trick

data structures

Thwarting Demonstrations

binary search, data structures, trees

Mushroom Gnomes - 2

binary search, data structures, probabilities, sortings

George and Cards

binary search, data structures

Students' Revenge

data structures, greedy, sortings

Chemistry Experiment

binary search, data structures, ternary search

Dog Show

constructive algorithms, data structures, greedy

Nastya Hasn't Written a Legend

binary search, data structures

Drivers Dissatisfaction

data structures, dsu, graphs, trees

Ralph And His Tour in Binary Country

brute force, data structures, trees

Mischievous Shooter

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

Package Delivery

data structures, divide and conquer, greedy

80-th Level Archeology

brute force, data structures, greedy, sortings

Nikita and stack

data structures

Radio stations

binary search, data structures

Appleman and a Sheet of Paper

data structures, implementation

Short Code

data structures, dp, greedy, strings, trees

Trader Problem

data structures, dsu, greedy, sortings

A Heap of Heaps

brute force, data structures, math, sortings

Monsters (hard version)

data structures, greedy

AI robots

data structures

Treeland Tour

data structures, dfs and similar, dp, trees

LaIS

data structures, dp, greedy

Chain Reaction

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

Vlad and the Nice Paths (hard version)

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

Changing Brackets

constructive algorithms, data structures, dp, greedy

Train Maintenance

brute force, data structures, implementation

Kuro and GCD and XOR and SUM

binary search, bitmasks, brute force, data structures, dp, dsu, greedy, math, number theory, strings, trees

Count The Rectangles

bitmasks, brute force, data structures, geometry, sortings

Anton and Permutation

brute force, data structures

The Number Games

data structures, greedy, trees

Fill the Matrix

data structures, greedy, math

Explosions?

binary search, data structures, dp, greedy, math

Case of Chocolate

data structures

Serge and Dining Room

binary search, data structures, graph matchings, greedy, implementation, math, trees

Let Them Slide

data structures, implementation

Robots on a Grid

data structures, dfs and similar, dsu, graphs, greedy, matrices

High Cry

binary search, bitmasks, combinatorics, data structures, divide and conquer

Addition on Segments

bitmasks, data structures, divide and conquer, dp

LIS of Sequence

data structures, dp, greedy, hashing, math

Irrigation

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

Valera and Queries

binary search, data structures

Sofia and Strings

data structures, greedy, sortings, strings, two pointers

Two Hundred Twenty One (hard version)

data structures, math

Two Types of Spells

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

Yaroslav and Divisors

data structures

Domino Principle

binary search, data structures, sortings

Not Escaping

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

Army Creation

binary search, data structures

Magic Triples (Hard Version)

brute force, data structures, math, number theory

Anonymity Is Important

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

Permutation Separation

data structures, divide and conquer

Kill Anton

brute force, constructive algorithms, data structures, math, strings

Lexicographically Small Enough

brute force, data structures, greedy, strings

Ezzat and Grid

data structures, dp, greedy

Sum Over Zero

data structures, dfs and similar, dp

Equilibrium

data structures, dp, greedy

Tricky Function

data structures, divide and conquer, geometry

Persistent Bookcase

bitmasks, data structures, dfs and similar, implementation

Antenna Coverage

data structures, dp, greedy, sortings

Gold Transfer

binary search, data structures, dp, greedy, interactive, trees

Tree Master

brute force, data structures, dfs and similar, trees

Trees and Segments

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

Special Segments of Permutation

data structures, divide and conquer, dsu, two pointers