Balanced Reversals

constructive algorithms

Balanced Distribution

data structures, dp, greedy

Balanced Domino Placements

combinatorics, dp

Balanced Binary Search Trees

dp, math

Balanced Playlist

binary search, data structures, implementation

Balanced Removals (Harder)

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

Balanced Removals (Easier)

constructive algorithms, geometry, greedy

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

Alice and the List of Presents

combinatorics, math

Yet Another Substring Reverse

bitmasks, dp

Special Permutations

math

Distinct Characters Queries

data structures

Pipes

dp, implementation

Middle-Out

constructive algorithms, greedy, strings

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

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

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

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

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

Geolocation

geometry

Gardener Alex

binary search, data structures

Tourism

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

Alex and Julian

bitmasks, math, number theory

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

Wi-Fi

data structures, dp, greedy

Numerical Sequence (hard version)

binary search, math

Numerical Sequence (easy version)

binary search, brute force, math

White Sheet

geometry, math

Radio Stations

2-sat

Marbles

bitmasks, dp

Ticket Game

games, greedy, math

Swap Letters

constructive algorithms, greedy

The Number of Products

combinatorics, dp, implementation

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

Optimal Currency Exchange

brute force, math

Path Queries

divide and conquer, dsu, graphs, sortings, trees

Unstable String Sort

data structures, dfs and similar, dsu, graphs, greedy, implementation, strings

Two Small Strings

brute force, constructive algorithms

Equalizing by Division (hard version)

brute force, math, sortings

Equalizing by Division (easy version)

brute force, implementation

Unusual Graph

*special problem, graphs

Road Repair in Treeland

*special problem, binary search, dp, trees

King's Path

*special problem, math, trees

kotlinkotlinkotlinkotlin...

*special problem, graphs, implementation, strings

Double Permutation Inc.

*special problem, binary search, greedy

Teams

*special problem, binary search, greedy, math

Ice Cream

*special problem, greedy, sortings

Traveling Around the Golden Ring of Berland

*special problem, implementation

Mateusz and Escape Room

dp

Marek and Matching (hard version)

brute force, probabilities

Marek and Matching (easy version)

brute force, probabilities

Wojtek and Card Tricks

math

Konrad and Company Evaluation

graphs

Kamil and Making a Stream

math, number theory, trees

Marcin and Training Camp

brute force, greedy

Anadi and Domino

brute force, graphs

Moving Walkways

data structures, greedy, math

Into Blocks (hard version)

data structures