The Sports Festival

dp, greedy

Almost Sorted

binary search, combinatorics, constructive algorithms, implementation

Binary Literature

constructive algorithms, greedy, implementation, strings, two pointers

Restoring the Permutation

constructive algorithms, implementation

Epic Transformation

constructive algorithms, data structures, greedy

Cakewalk

*special problem, greedy, implementation, shortest paths

Xenolith? Hippodrome?

*special problem, number theory

Fibonacci Words

*special problem, implementation

DMCA

*special problem, implementation, number theory

3-Coloring

constructive algorithms, games, interactive

Balance the Bits

constructive algorithms, greedy

Going Home

brute force, hashing, implementation, math

Minimum Grid Path

brute force, data structures, greedy, math

Planar Reflections

brute force, data structures, dp

Box Fitting

binary search, bitmasks, data structures, greedy

Square-Free Division (easy version)

data structures, dp, greedy, math, number theory, two pointers

k-LCM (hard version)

constructive algorithms, math

Let's Go Hiking

games, greedy

1D Sokoban

binary search, dp, greedy, implementation, two pointers

Berland Crossword

bitmasks, brute force, greedy, implementation

Planet Lapituletti

brute force, implementation

Genius's Gambit

bitmasks, constructive algorithms, greedy, math

Maximum width

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

Zookeeper and The Infinite Zoo

bitmasks, constructive algorithms, dp, greedy, math

Pekora and Trampoline

brute force, data structures, dp, greedy, implementation

Old Floppy Drive

binary search, data structures, math

Equalize the Array

binary search, data structures, greedy, math, sortings

Accidental Victory

binary search, data structures, greedy

Problemsolving Marathon

*special problem, binary search, greedy

Two Policemen

*special problem, binary search, brute force, math

RBS Deletion

*special problem, greedy

Pythagorean Triples

binary search, brute force, math, number theory

Minimum Ties

brute force, constructive algorithms, dfs and similar, graphs, greedy, implementation, math

Guessing the Greatest (hard version)

binary search, interactive

Guessing the Greatest (easy version)

binary search, interactive

Eastern Exhibition

binary search, geometry, shortest paths, sortings

Floor and Mod

binary search, brute force, math, number theory

Playlist

data structures, dsu, implementation, shortest paths

Basic Diplomacy

brute force, constructive algorithms, greedy, implementation

Restore Modulo

implementation, math

Fence Painting

brute force, constructive algorithms, greedy

Painting the Array I

constructive algorithms, data structures, dp, greedy, implementation

Searching Local Minimum

binary search, interactive, ternary search

Nezzar and Symmetric Array

implementation, math, sortings

Nezzar and Binary String

data structures, greedy

Nezzar and Board

constructive algorithms, math, number theory

Journey

dfs and similar, dp, dsu, implementation

Longest Simple Cycle

dp, graphs, greedy

Inflation

binary search, brute force, greedy, math

Strange Beauty

dp, math, number theory, sortings

Unusual Matrix

2-sat, brute force, constructive algorithms

Advertising Agency

combinatorics, math, sortings

Cleaning the Phone

binary search, dp, sortings, two pointers

Ball in Berland

combinatorics, graphs, math

Array Destruction

brute force, constructive algorithms, data structures, greedy, implementation, sortings

Program

data structures, dp, implementation, strings

No More Inversions

constructive algorithms, math

Correct Placement

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

Strange Definition

bitmasks, graphs, hashing, math, number theory

Strange Birthday Party

binary search, dp, greedy, sortings, two pointers

Ceil Divisions

brute force, constructive algorithms, math, number theory

Building a Fence

dp, greedy, implementation, two pointers

The Robot

brute force, implementation

Road Reform

dsu, graphs, greedy

Full Turn

geometry, hashing, number theory

Firecrackers

binary search, sortings

Berpizza

data structures, implementation

Three Bags

constructive algorithms, greedy

Hills And Valleys

brute force, implementation

Apollo versus Pan

bitmasks, brute force, math

13th Labour of Heracles

data structures, greedy, sortings, trees

Canine poetry

dp, greedy, strings

Pairs

binary search, constructive algorithms, greedy, two pointers

Busy Robot

implementation

Find The Array

bitmasks, constructive algorithms, greedy

The Treasure of The Segments

binary search, data structures, greedy

Close Tuples (hard version)

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

Close Tuples (easy version)

binary search, combinatorics, math, sortings, two pointers

Add to Neighbour and Remove

greedy, math, number theory

Divide and Summarize

binary search, brute force, data structures, divide and conquer, implementation, sortings

Random Events

dp, math, probabilities

Find the Spruce

brute force, dp, implementation

Move and Turn

dp, math

Row GCD

math, number theory

Sequence and Swaps

dp, greedy, sortings

Number into Sequence

constructive algorithms, math, number theory

Checkpoints

brute force, constructive algorithms, greedy, math, probabilities

Triangles

greedy, implementation

Suffix Operations

constructive algorithms, implementation

Radio Towers

combinatorics, dp, math

Toy Blocks

binary search, greedy, math, sortings

Circle Game

games, geometry, math

String Equality

dp, greedy, hashing, implementation, strings

Rating Compression

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

Catching Cheaters

dp, strings

Knapsack

constructive algorithms, greedy, sortings

Divide and Sum

combinatorics, math, sortings

Division

brute force, math, number theory

The Delivery Dilemma

binary search, greedy, sortings

Saving the City

dp, greedy, math, sortings