Balanced Removals (Easier)

constructive algorithms, geometry, greedy

Balanced Tunnel

data structures, sortings, two pointers

Balanced Rating Changes

implementation, math

Alice and the Cactus

dfs and similar, graphs, math, probabilities

Alice and the Unfair Game

binary search, data structures, dp, dsu

Alice and the Doll

brute force, data structures, greedy, implementation

Labs

constructive algorithms, greedy, implementation

Alice and the List of Presents

combinatorics, math

Stones

brute force, greedy, math

Yet Another Substring Reverse

bitmasks, dp

Special Permutations

math

Distinct Characters Queries

data structures

Pipes

dp, implementation

Social Network (hard version)

data structures, implementation

Social Network (easy version)

implementation

Equalize Prices Again

math

Middle-Out

constructive algorithms, greedy, strings

Increasing Matrix

greedy

Ania and Minimizing

greedy, implementation

Dawid and Bags of Candies

brute force, implementation

One Node is Gone

constructive algorithms, implementation, trees

Another Filling the Grid

combinatorics, dp, math

Complete Tripartite

brute force, constructive algorithms, graphs, hashing, implementation

Primes and Multiplication

math, number theory

Filling the Grid

implementation, math

Distinct Digits

brute force, implementation

Not Same

constructive algorithms

Wrong Answer on test 233 (Hard Version)

combinatorics, math

Wrong Answer on test 233 (Easy Version)

dp

Arson In Berland Forest

binary search, graphs, graphs, shortest paths

Optimal Subsequences (Hard Version)

data structures, greedy

Optimal Subsequences (Easy Version)

data structures, greedy

Messy

constructive algorithms

Box

constructive algorithms

Math Problem

math

To Make 1

bitmasks, constructive algorithms, dp, greedy, number theory

Tree Factory

constructive algorithms, greedy, trees

Rock Is Push

binary search, dp

Power Products

hashing, math, number theory

p-binary

bitmasks, brute force, math

TV Subscriptions (Hard Version)

implementation, two pointers

TV Subscriptions (Easy Version)

implementation

Forgetting Things

math

Wooden Raft

binary search, math, number theory

Stack Exterminable Arrays

data structures, divide and conquer, dp, hashing

Paint the Tree

dp, sortings, trees

Sequence Sorting

dp, greedy, two pointers

Save the Nature

binary search, greedy

Strings Equalization

strings

CME

math

Graph And Numbers

bitmasks, brute force, combinatorics, dp, meet-in-the-middle

Choose a Square

binary search, data structures, sortings

Game With String

games

Make The Fence Great Again

dp

Perfect Team

binary search, math

Knights

constructive algorithms, greedy

2048 Game

brute force, greedy, math

Geolocation

geometry

Gardener Alex

binary search, data structures

Tourism

dfs and similar, dp, dsu, graphs, greedy, trees

Alex and Julian

bitmasks, math, number theory

Substring Game in the Lesson

games, greedy, strings

Multiplication Table

math, number theory

Cards

implementation, sortings, strings

Harvester

implementation

Periodic integer number

implementation, strings

The Light Square

2-sat, dfs and similar, greedy

Function Composition

dfs and similar

Alpha planetary system

constructive algorithms, graphs, shortest paths

Workout plan

data structures, greedy

Product Tuples

divide and conquer, fft

Xor Spanning Tree

divide and conquer, fft, graphs

Jumping Transformers

dp

Guarding warehouses

data structures, geometry

BubbleReactor

dp, graphs

Forced Online Queries Problem

data structures, divide and conquer, dsu, graphs, trees

Sum Queries?

data structures, greedy, implementation, math

Coloring Edges

constructive algorithms, dfs and similar, graphs

The Number Of Good Substrings

binary search, bitmasks, brute force

Zmei Gorynich

greedy, math

Creating a Character

binary search, math

Wi-Fi

data structures, dp, greedy

Numerical Sequence (hard version)

binary search, math

Numerical Sequence (easy version)

binary search, brute force, math

Swords

math

White Sheet

geometry, math

Shooting

greedy, implementation, sortings

Prefixes

strings

Radio Stations

2-sat

Marbles

bitmasks, dp

Ticket Game

games, greedy, math

Swap Letters

constructive algorithms, greedy

The Number of Products

combinatorics, dp, implementation

Yellow Cards

greedy, implementation, math

Tiles Placement

constructive algorithms, dfs and similar, trees

Feeling Good

bitmasks, data structures

Employment

greedy, sortings

Petya and Construction Set

constructive algorithms, graphs, math, sortings, trees

Treasure Island

dfs and similar, dp, flows, hashing

Bad Sequence

data structures, greedy