Archaeology

brute force, constructive algorithms, greedy, strings

Imbalanced Arrays

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

Balanced Removals (Harder)

binary search, constructive algorithms, divide and conquer, greedy, implementation, sortings

Lucky Tickets

greedy

Equalize the Remainders

data structures, greedy, implementation

Perfect Security

data structures, greedy, strings, trees

XOR Inverse

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

Divide by Three

dp, greedy, math, number theory

Petya's Exams

greedy, implementation, sortings

Nearest Beautiful Number (hard version)

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

New Year Snowmen

binary search, data structures, greedy

Lorry

greedy, sortings

Restore the Permutation

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

Robot Vacuum Cleaner

greedy, sortings

Optimal Subsequences (Hard Version)

data structures, greedy

Pairs

binary search, constructive algorithms, greedy, two pointers

Madoka and The Corruption Scheme

combinatorics, constructive algorithms, greedy, math

Empty Graph

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

Block Towers

brute force, greedy, math, number theory

Identify the Operations

combinatorics, data structures, dsu, greedy, implementation

Poster

greedy, implementation

Mahmoud and a Message

brute force, dp, greedy, strings

Dreamoon and Sets

constructive algorithms, greedy, math

Shift and Reverse

greedy, sortings

Robot Collisions

data structures, greedy, implementation, sortings

Survey in Class

brute force, data structures, greedy, implementation, sortings

The Strongest Build

binary search, brute force, data structures, dfs and similar, graphs, greedy, hashing, implementation

Gift Set

binary search, greedy, math, ternary search

Thematic Contests

greedy, sortings

Treasure Hunt

greedy

Multi-judge Solving

greedy, implementation

Shaass and Bookshelf

dp, greedy

Cheap Dinner

brute force, data structures, graphs, greedy, implementation, sortings, two pointers

Paths and Trees

graphs, greedy, shortest paths

Sereja and Contests

greedy, implementation, math

Numbers on Tree

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

Beautiful Lyrics

data structures, greedy, strings

AB Graph

brute force, constructive algorithms, graphs, greedy, implementation

Expression Evaluation Error

constructive algorithms, greedy, implementation, math

Bouncing Boomerangs

constructive algorithms, greedy, implementation

Number Reduction

greedy

Array and Segments (Easy version)

brute force, greedy, implementation

Anya and Ghosts

constructive algorithms, greedy

Send Boxes to Alice (Easy Version)

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

Accommodation

brute force, dp, greedy, implementation

Paths on the Tree

dfs and similar, dp, greedy, sortings, trees

Buying Jewels

constructive algorithms, greedy, math

Vasya and Public Transport

greedy, implementation

Great Vova Wall (Version 1)

greedy, implementation, math

Teleporters (Hard Version)

binary search, greedy, sortings

K-beautiful Strings

binary search, brute force, constructive algorithms, greedy, strings

New Year Concert

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

Hierarchy

dfs and similar, dsu, greedy, shortest paths

Om Nom and Dark Park

dfs and similar, greedy, implementation

Squares and not squares

constructive algorithms, greedy

Pokémon Army (hard version)

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

Cableway

greedy, math

Too Easy Problems

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

Progressions Covering

data structures, greedy

Polycarp at the Radio

greedy

Nuts

greedy, math

Elections

brute force, greedy

Hacker, pack your bags!

binary search, greedy, implementation, sortings

Omkar and Medians

data structures, greedy, implementation

Purification

constructive algorithms, greedy

School Marks

greedy, implementation

Binary Subsequence Rotation

binary search, constructive algorithms, data structures, greedy

Bertown Subway

dfs and similar, greedy, math

Berserk And Fireball

constructive algorithms, greedy, implementation, math, two pointers

Petya and Inequiations

greedy

Array Product

constructive algorithms, greedy, math

Easy Assembly

greedy, sortings

Restaurant

dp, greedy, sortings

One-Dimensional Battle Ships

binary search, data structures, greedy, sortings

Clique Problem

data structures, dp, greedy, implementation, sortings

Restore Permutation

binary search, data structures, greedy, implementation

Dress'em in Vests!

binary search, brute force, greedy, two pointers

Absolute Beauty

greedy, math

Obtain a Permutation

greedy, implementation, math

Binary Number

greedy

Keep the Average High

dp, greedy, math

For Gamers. By Gamers.

binary search, brute force, greedy, math, sortings

Checkpoints

greedy, implementation, sortings

Nauuo and Cards

greedy, implementation

Restorer Distance

binary search, greedy, math, sortings, ternary search

Long Jumps

binary search, greedy, implementation

Buy Low Sell High

constructive algorithms, data structures, greedy

Black Cells

binary search, brute force, greedy, math

GameGame

bitmasks, constructive algorithms, dp, games, greedy, math

Quiz

binary search, greedy, math, matrices, number theory

Minimizing Difference

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

Too Many Segments (easy version)

greedy

Weights Distributing

brute force, graphs, greedy, shortest paths, sortings

Serval and Rooted Tree

binary search, dfs and similar, dp, greedy, trees

Dances (Hard Version)

binary search, greedy, sortings, two pointers

Reset K Edges

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

Pavel and Triangles

brute force, dp, fft, greedy, ternary search

Andrey and Problem

greedy, math, probabilities

Garbage Disposal

greedy

Desktop Rearrangement

data structures, greedy, implementation