Small Permutation Problem (Easy Version)

brute force, combinatorics, dp, math

Train Maintenance

brute force, data structures, implementation

List Of Integers

binary search, bitmasks, brute force, combinatorics, math, number theory

Kuro and GCD and XOR and SUM

binary search, bitmasks, brute force, data structures, dp, dsu, greedy, math, number theory, strings, trees

Railguns

brute force, dfs and similar, dp, graphs

Count The Rectangles

bitmasks, brute force, data structures, geometry, sortings

Lights

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

Equidistant Vertices

brute force, combinatorics, dfs and similar, dp, trees

Anton and Permutation

brute force, data structures

Ela and the Wiring Wizard

brute force, dp, graphs, greedy, implementation, shortest paths

Math Test

bitmasks, brute force, greedy

Two Houses

brute force, graphs, greedy, interactive, sortings

RPD and Rap Sheet (Hard Version)

brute force, constructive algorithms, interactive, math

Two chandeliers

binary search, brute force, chinese remainder theorem, math, number theory

Combinatorics Problem

brute force, combinatorics, dp

Water Level

brute force, graphs, greedy, implementation, math

Little C Loves 3 II

brute force, constructive algorithms, flows, graph matchings

Tree Queries (Easy Version)

brute force, constructive algorithms, dfs and similar, dp, greedy, trees

Cute Sequences

binary search, brute force, greedy, math

Construct the Binary Tree

brute force, constructive algorithms, trees

Count Seconds

brute force, constructive algorithms, dp, graphs, implementation, math

Power Board

brute force, dp, math, number theory

Magic Triples (Hard Version)

brute force, data structures, math, number theory

K-th Path

brute force, constructive algorithms, shortest paths, sortings

Mike and Frog

brute force, greedy, implementation, math

Anonymity Is Important

binary search, brute force, data structures, dsu, greedy, sortings

Kill Anton

brute force, constructive algorithms, data structures, math, strings

Lexicographically Small Enough

brute force, data structures, greedy, strings

Vika and Bonuses

binary search, brute force, math, ternary search

Minimum Possible LCM

brute force, greedy, math, number theory

Tree Master

brute force, data structures, dfs and similar, trees

Trees and Segments

brute force, data structures, dp, greedy, two pointers

Sum of Digits

brute force, constructive algorithms, dp, greedy

Paired Payment

binary search, brute force, constructive algorithms, dp, flows, graphs, shortest paths

Perfect Triples

bitmasks, brute force, constructive algorithms, divide and conquer, math

Infinite Path

brute force, dfs and similar, graphs, math, number theory

Decreasing Heights

brute force, dp

Earn or Unlock

bitmasks, brute force, dp

To Go Or Not To Go?

brute force, dfs and similar, graphs, greedy, implementation, shortest paths

Compatible Numbers

bitmasks, brute force, dfs and similar, dp

Crosses

brute force, implementation

Writing a Song

brute force, dp, strings

Mushroom Strife

brute force, dfs and similar

Broken Monitor

brute force, constructive algorithms, greedy, implementation

Kamal-ol-molk's Painting

brute force, constructive algorithms, greedy

Blackboard Fibonacci

brute force, math

Elections

brute force

Heidi Learns Hashing (Medium)

brute force, number theory

Caisa and Tree

brute force, dfs and similar, math, number theory, trees

Vanya and Brackets

brute force, dp, expression parsing, greedy, implementation, strings

Nice table

brute force, constructive algorithms, greedy, math

Careful Maneuvering

bitmasks, brute force, geometry

Nastya and a Game

brute force, implementation, math

Berland and the Shortest Paths

brute force, dfs and similar, graphs, shortest paths

Light Bulbs (Easy Version)

brute force, combinatorics, dfs and similar, dp, dsu, graphs, math, trees

Full Binary Tree Queries

brute force, implementation, trees

Topforces Strikes Back

brute force, math, sortings

Two Pizzas

bitmasks, brute force

Characteristics of Rectangles

binary search, bitmasks, brute force, implementation, sortings

Field expansion

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

Post Lamps

brute force, greedy

Check Transcription

brute force, data structures, hashing, strings

Time to Raid Cowavans

brute force, data structures, sortings

Maximal Area Quadrilateral

brute force, geometry

The Queue

brute force, greedy

Petya, Petya, Petr, and Palindromes

binary search, brute force, data structures, two pointers

Staircases

brute force, combinatorics, data structures, dfs and similar, dp, implementation, math

Rearrange Brackets

brute force, dp, greedy, sortings, strings

Rain

binary search, brute force, data structures, geometry, greedy, implementation, math

You Are Given a WASD-string...

brute force, data structures, dp, greedy, implementation, math, strings

Grime Zoo

brute force, greedy, implementation, strings

String

brute force, constructive algorithms, hashing, implementation, string suffix structures, strings

Sheikh (Hard Version)

binary search, bitmasks, brute force, greedy, implementation, two pointers

Clique Partition

brute force, constructive algorithms, graphs, greedy, implementation

Hossam and (sub-)palindromic tree

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

Speedrun

brute force, dfs and similar, dp, graphs, greedy, math, sortings, two pointers

Anya and Cubes

binary search, bitmasks, brute force, dp, math, meet-in-the-middle

The LCMs Must be Large

bitmasks, brute force, constructive algorithms, math, number theory

New Year's Puzzle

brute force, dp, graph matchings, greedy, sortings

Monsters

brute force, data structures, dfs and similar, dsu, graphs, greedy

Vasya and Beautiful Arrays

brute force, dp, number theory

MEX vs DIFF

binary search, brute force, constructive algorithms, data structures, greedy, two pointers

Timofey and Black-White Tree

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

Best Pair

binary search, brute force, implementation

Permutation Shift

brute force, combinatorics, constructive algorithms, dfs and similar, dsu, graphs, math

Recovering BST

brute force, dp, math, number theory, trees

Longest Subsequence

brute force, math, number theory

Challenges in school №41

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

Divisibility by 25

brute force, greedy

Martial Arts Tournament

binary search, brute force, greedy, math

Two Arrays

binary search, brute force, combinatorics, constructive algorithms, dp, two pointers

Segment Intersections

brute force, greedy, implementation, math

Reducing Delivery Cost

brute force, graphs, shortest paths

Nearest Beautiful Number (hard version)

bitmasks, brute force, constructive algorithms, dfs and similar, dp, greedy

Binary Median

binary search, bitmasks, brute force, constructive algorithms

Xor-Paths

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

Remainder Problem

brute force, data structures, implementation

GCD of an Array

brute force, data structures, hashing, implementation, math, number theory, sortings, two pointers

Weights Distributing

brute force, graphs, greedy, shortest paths, sortings

Omkar and Circle

brute force, dp, games, greedy