Three Sevens

brute force, data structures, greedy, implementation

Showstopper

greedy, implementation, sortings

Li Hua and Chess

constructive algorithms, greedy, interactive

Li Hua and Pattern

constructive algorithms, greedy

Li Hua and Maze

constructive algorithms, flows, graphs, greedy, implementation

Colored Subgraphs

dfs and similar, dp, games, greedy, trees

Maximum Subarray

data structures, dp, greedy, two pointers

Blocking Chips

binary search, constructive algorithms, dfs and similar, greedy, trees

Explosions?

binary search, data structures, dp, greedy, math

Ideal Point

brute force, geometry, greedy

Labeling the Tree with Distances

data structures, dp, greedy, hashing, implementation, trees

Scoring Subsequences

binary search, greedy, math, two pointers

Not Dividing

constructive algorithms, greedy, math

Velepin and Marketing

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

Moscow Gorillas

binary search, dp, greedy, implementation, math, two pointers

Yet Another Promotion

greedy, math

Min Max Sort

binary search, brute force, greedy, math, two pointers

Stand-up Comedian

greedy, math

GamingForces

greedy, sortings

Teleporters (Hard Version)

binary search, greedy, sortings

Teleporters (Easy Version)

greedy, sortings

Negatives and Positives

dp, greedy, sortings

Distinct Split

brute force, greedy, strings

Timofey and Black-White Tree

brute force, dfs and similar, divide and conquer, graphs, greedy, math, shortest paths, trees

Matryoshkas

data structures, greedy, sortings

Taisia and Dice

greedy, greedy, math

Serval and Brain Power

bitmasks, brute force, dp, greedy, implementation, strings

XOR, Tree, and Queries

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

Matching Numbers

constructive algorithms, greedy, math

Sum of Two Numbers

constructive algorithms, greedy, implementation, math, probabilities

The Harmonization of XOR

bitmasks, constructive algorithms, greedy, math

Remove the Bracket

dp, greedy, math

Number Factorization

greedy, math, number theory

Monsters (hard version)

data structures, greedy

Monsters (easy version)

brute force, greedy

Yet Another Tournament

binary search, greedy, sortings

Rectangle Shrinking

binary search, brute force, data structures, greedy, implementation, two pointers

Equal Frequencies

brute force, constructive algorithms, greedy, implementation, sortings, strings

Going to the Cinema

brute force, greedy, sortings

GCD Partition

brute force, greedy, math, number theory

Hayato and School

constructive algorithms, greedy

Anya's Simultaneous Exhibition

constructive algorithms, graphs, greedy, interactive, sortings

Boris and His Amazing Haircut

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

Least Prefix Sum

data structures, greedy

Hall of Fame

constructive algorithms, greedy, strings

The Forbidden Permutation

greedy, math

Flip Flop Sum

greedy, implementation

Emordnilap

combinatorics, greedy, math

Everybody Likes Good Arrays!

greedy, math

Parmigiana With Seafood

binary search, dp, greedy, trees

Spinach Pizza

games, geometry, greedy, interactive

Train Splitting

constructive algorithms, graphs, greedy

Teamwork

constructive algorithms, greedy, math

Library game

games, greedy, interactive, sortings

Walking Boy

greedy

Laboratory on Pluto

constructive algorithms, dp, greedy, math

The Human Equation

greedy, implementation

Gardener and the Capybaras (hard version)

constructive algorithms, greedy

Two Chess Pieces

dfs and similar, dp, greedy, trees

Same Count One

brute force, constructive algorithms, greedy, implementation, two pointers

Ice and Fire

constructive algorithms, dp, greedy

Coloring

constructive algorithms, greedy, math

Easy Assembly

greedy, sortings

Dominoes

combinatorics, flows, graph matchings, greedy

Gaining Rating

binary search, greedy, implementation, math, sortings, two pointers

Different Differences

constructive algorithms, greedy, math

Hossam and Trainees

greedy, math, number theory

Koxia and Whiteboards

brute force, greedy

Подкрутка I

*special problem, brute force, dp, greedy

Wonderful Jump

dp, greedy

Lucky Permutation

constructive algorithms, dfs and similar, graphs, greedy

Elemental Decompress

constructive algorithms, greedy, implementation, sortings

Quick Sort

greedy, math

Greatest Convex

greedy, math, number theory

Playoff

combinatorics, constructive algorithms, dp, greedy, math

Block Towers

data structures, greedy, sortings

Number Reduction

greedy

Torus Path

greedy, math

Hospital Queue

binary search, graphs, greedy, implementation

Broken Keyboard

greedy

Doremy's Number Line

dp, greedy, sortings

Doremy's City Construction

graphs, greedy

Doremy's Paint

greedy

Another Array Problem

brute force, constructive algorithms, greedy

Absolute Maximization

bitmasks, constructive algorithms, greedy, math

Divide and Conquer

greedy, math, number theory

Make It Connected

binary search, brute force, constructive algorithms, dsu, graphs, greedy, matrices, trees, two pointers

Set Construction

constructive algorithms, dfs and similar, graphs, greedy

Elimination of a Ring

constructive algorithms, greedy, implementation

Quests

binary search, greedy, sortings

Binary Inversions

data structures, greedy, math

Atilla's Favorite Problem

greedy, implementation, strings

Restore the Permutation

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

All Possible Digits

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

Thermostat

greedy, math, shortest paths

Almost All Multiples

greedy, number theory

Kevin and Permutation

constructive algorithms, greedy, math

Technical Support

greedy

N Machines

binary search, brute force, greedy

Make Nonzero Sum (hard version)

constructive algorithms, dp, greedy