Computer Game

brute force, dfs and similar, dp, implementation

Rubik's Cube Coloring (hard version)

brute force, dp, implementation, math, trees

Make Them Equal

brute force, greedy, math, strings

Gardener and Tree

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

Half of Same

brute force, math, number theory

Korney Korneevich and XOR (hard version)

binary search, brute force, dp, greedy, two pointers

Grandma Capa Knits a Scarf

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

Railway Construction

brute force, constructive algorithms, data structures, graphs, shortest paths

Subsequence

brute force, divide and conquer, dp, greedy, trees

Train Maintenance

brute force, data structures, implementation

Mathematics Curriculum

brute force, combinatorics, dp, trees

Portal

brute force, data structures, dp, greedy, implementation

Array Stabilization (AND version)

brute force, graphs, math, number theory, shortest paths

Kingdom of Islands

brute force, graphs, implementation

Just Kingdom

brute force, data structures, dfs and similar

Jeopardy of Dropped Balls

binary search, brute force, dsu, implementation

Divisible by Twenty-Five

brute force, dfs and similar, dp

The Strongest Build

binary search, brute force, data structures, dfs and similar, graphs, greedy, hashing, implementation

Xor of 3

brute force, constructive algorithms, greedy, two pointers

Book

binary search, brute force, data structures, dp, graphs, implementation, sortings

Sweepstake

*special problem, brute force, constructive algorithms, implementation, math

Palindromic Hamiltonian Path

brute force, dfs and similar, dp, graphs, hashing

Playoff Restoration

bitmasks, brute force, hashing, implementation, meet-in-the-middle

Scenes From a Memory

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

Up the Strip (simplified version)

brute force, data structures, dp, math, number theory

Simply Strange Sort

brute force, implementation, sortings

Nearest Beautiful Number (hard version)

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

Nearest Beautiful Number (easy version)

binary search, bitmasks, brute force, constructive algorithms, dfs and similar, greedy

Mocha and Diana (Hard Version)

brute force, constructive algorithms, dfs and similar, dsu, graphs, greedy, trees, two pointers

Mocha and Diana (Easy Version)

brute force, constructive algorithms, dsu, graphs, greedy, trees

Up the Strip

brute force, dp, math, number theory, two pointers

Charmed by the Game

brute force, math

Assiut Chess

brute force, constructive algorithms, interactive

Ezzat and Two Subsequences

brute force, math, sortings

Compressed Bracket Sequence

brute force, implementation

Say No to Palindromes

brute force, constructive algorithms, dp, strings

Coin Rows

brute force, constructive algorithms, dp, implementation

Two Tables

brute force

PizzaForces

brute force, math

Cobb

bitmasks, brute force, greedy, math

Common Divisor Graph

brute force, constructive algorithms, dsu, graphs, hashing, math, number theory

Permutation Shift

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

Penalty

bitmasks, brute force, dp, greedy

Reverse String

brute force, dp, hashing, implementation, strings

A Serious Referee

bitmasks, brute force, dfs and similar, sortings

Array Differentiation

bitmasks, brute force, constructive algorithms, dfs and similar, dp, graphs, math

Equidistant Vertices

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

Fixed Points

binary search, brute force, dp

Stringforces

binary search, bitmasks, brute force, dp, strings, two pointers

Manhattan Subarrays

brute force, geometry, greedy, implementation

Gregor and the Odd Cows (Hard)

brute force, geometry, math, number theory

Web of Lies

brute force, graphs, greedy

Array Stabilization (GCD version)

binary search, brute force, data structures, divide and conquer, number theory, two pointers

AquaMoon and Two Arrays

brute force, greedy

AquaMoon and Potatoes

brute force, data structures, dp

AquaMoon and Permutations

2-sat, brute force, combinatorics, constructive algorithms, graph matchings, graphs

RPD and Rap Sheet (Hard Version)

brute force, constructive algorithms, interactive, math

Need for Pink Slips

bitmasks, brute force, dfs and similar, implementation, math, probabilities

Pleasant Pairs

brute force, implementation, math, number theory

Inverse Inversions

binary search, brute force, data structures

Tree Array

brute force, combinatorics, dp, graphs, math, probabilities, trees

Stone Game

brute force, dp, greedy

Erase and Extend (Easy Version)

binary search, brute force, dp, greedy, hashing, implementation, string suffix structures, strings, two pointers

Prinzessin der Verurteilung

brute force, constructive algorithms, strings

Omkar and Bad Story

brute force, constructive algorithms

String Distance

binary search, brute force, data structures, hashing, implementation, strings

Array Reodering

brute force, greedy, math, number theory, sortings

Fair Playoff

brute force, implementation

Colour the Flag

brute force, implementation

Сортировка слиянием

*special problem, *special problem, brute force

Pursuit

binary search, brute force, greedy, sortings

Kill Anton

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

Potions (Easy Version)

brute force, data structures, dp, greedy

Goblins And Gnomes

brute force, dp, flows, graph matchings

Love-Hate

bitmasks, brute force, dp, probabilities

Compression and Expansion

brute force, data structures, greedy, implementation, trees

To Go Or Not To Go?

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

Ordinary Numbers

brute force, math, number theory

Do Not Be Distracted!

brute force, implementation

Chests and Keys

bitmasks, brute force, dfs and similar, dp, flows

Maximum Sum of Products

brute force, dp, implementation, math, two pointers

Berland Regional

brute force, data structures, greedy, number theory, sortings

AGAGA XOOORRR

bitmasks, brute force, dp, greedy

Phoenix and Bits

bitmasks, brute force, data structures, sortings

Phoenix and Puzzle

brute force, geometry, math, number theory

Swapping Problem

brute force, constructive algorithms, data structures, sortings

Short Task

brute force, dp, math, number theory

Education

brute force, dp, greedy, implementation

Permutation by Sum

brute force, greedy, math

Spy Detected!

brute force, implementation

Chips on a Board

bitmasks, brute force, data structures, dp, games, two pointers

Chainword

brute force, data structures, dp, matrices, string suffix structures, strings

Min Cost String

brute force, constructive algorithms, graphs, greedy, strings

Yet Another Card Deck

brute force, data structures, implementation, trees

King's Task

brute force, graphs, implementation

Optimal Encoding

brute force, data structures

Tree Calendar

brute force, constructive algorithms, data structures, dfs and similar, sortings, trees

Complete the MST

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

Maximize the Remaining String

brute force, data structures, dp, greedy, strings

Double-ended Strings

brute force, implementation, strings