Lazyland

Unfair Poll

binary search, constructive algorithms, implementation, math

Set To Max (Hard Version)

constructive algorithms, data structures, divide and conquer, greedy, implementation, sortings

Subsequence Counting

bitmasks, constructive algorithms, greedy, implementation

Sereja and Swaps

brute force, sortings

Dynasty Puzzles

dp

Time to Run

constructive algorithms, graphs, implementation

The Fair Nut and Rectangles

data structures, dp, geometry

Magic Stones

constructive algorithms, math, sortings

Multipliers

math, number theory

Microcycle

data structures, dfs and similar, dsu, graphs, greedy, implementation, sortings, trees

Nested Segments

data structures, sortings

Array Partition

binary search, data structures, greedy, two pointers

Average Numbers

brute force, implementation

Devu and Partitioning of the Array

brute force, constructive algorithms, implementation, number theory

The Brand New Function

bitmasks

Balanced Playlist

binary search, data structures, implementation

Balls of Buma

Martial Arts Tournament

binary search, brute force, greedy, math

Missile Silos

data structures, dfs and similar, graphs, shortest paths

The Golden Age

brute force, math

Porcelain

dp

Hard Work

strings

Kay and Snowflake

data structures, dfs and similar, dp, trees

Robot Factory

bitmasks, dfs and similar

Connecting Universities

dfs and similar, dp, graphs, trees

Tavas and Malekas

greedy, hashing, string suffix structures, strings

Jon Snow and his Favourite Number

brute force, dp, implementation, sortings

Toy Train (Simplified)

brute force, greedy

Rarity and New Dress

dfs and similar, dp, implementation, shortest paths

Sereja and Mirroring

implementation

Collapsing Strings

data structures, strings, trees

ZgukistringZ

brute force, constructive algorithms, implementation, strings

Graph And Its Complement

constructive algorithms, graphs, implementation

Beingawesomeism

implementation, math

Home Numbers

*special problem, constructive algorithms, math

Permutations

brute force, combinatorics, implementation

Cubical Planet

math

Nastya Is Buying Lunch

greedy

Renting Bikes

binary search, greedy

Lonely Mountain Dungeons

brute force, data structures, greedy, math, ternary search

Ancient Prophesy

brute force, implementation, strings

Report

data structures, sortings

Nauuo and Circle

combinatorics, dfs and similar, dp, trees

Same Sum Blocks (Easy)

greedy

Chord

brute force, implementation

Anton and Tree

dfs and similar, dp, trees

Playlist

data structures, dsu, implementation, shortest paths

Little Artem and Matrix

implementation

Easy Scheduling

implementation, math

Repetitions Decoding

constructive algorithms, implementation, sortings

Moving Dots

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

Segment Tree

data structures, dsu, graphs, trees

Posterized

games, greedy

Median on Segments (Permutations Edition)

sortings

Shaass and Lights

combinatorics, number theory

Vasilije Loves Number Theory

brute force, math, number theory

Polycarp's phone book

data structures, implementation, sortings

Suspicious logarithms

binary search, brute force, math

Concatenated Multiples

implementation, math

A Mist of Florescence

constructive algorithms, graphs

Small GCD

bitmasks, brute force, dp, math, number theory

Homework

greedy

Tavas and Karafs

binary search, greedy, math

Hongcow Solves A Puzzle

implementation

Li Hua and Tree

brute force, data structures, dfs and similar, dp, implementation, trees

All Possible Digits

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

GCD Guess

bitmasks, chinese remainder theorem, constructive algorithms, games, interactive, math, number theory

Dasha and Nightmares

bitmasks, hashing, meet-in-the-middle, strings

Sum over all Substrings (Easy Version)

brute force, dp, greedy, strings

Almost Difference

data structures, math

Which floor?

brute force, implementation

Challenges in school №41

brute force, constructive algorithms, games, graphs, greedy, implementation, sortings

Trees in a Row

brute force, implementation

Alex and Julian

bitmasks, math, number theory

Matrix Walk

implementation

Fixed Points

binary search, brute force, dp

Case of Fugitive

data structures, greedy, sortings

Tram

constructive algorithms, implementation, math

The Union of k-Segments

greedy, sortings

0-1-Tree

dfs and similar, divide and conquer, dp, dsu, trees

Compression

dp, implementation, math, number theory

Anton and Chess

implementation

Duff in the Army

data structures, trees

Dima and Text Messages

brute force, strings

Riverside Curio

data structures, dp, greedy

2-3-numbers

implementation, math

Programming Competition

dfs and similar, dp, graph matchings, greedy, trees

Matchmaker

*special problem, greedy, sortings

Robot Queries

binary search, data structures, dp, implementation

Koxia and Game

constructive algorithms, data structures, dfs and similar, dsu, flows, games, graph matchings, graphs, implementation

How many trees?

combinatorics, divide and conquer, dp

Range Sorting (Easy Version)

binary search, dp, dsu, greedy, trees, two pointers

Fight the Monster

binary search, brute force, implementation

Divisibility by 25

brute force, greedy

Unique Palindromes

constructive algorithms, math, strings

Chemical table

constructive algorithms, dfs and similar, dsu, graphs, matrices

Divan and Kostomuksha (easy version)

dp, number theory

Escape The Maze (hard version)

dfs and similar, dp, greedy, shortest paths, trees

Equation

math