Equalizing Two Strings

constructive algorithms, sortings, strings

Array Shuffling

constructive algorithms, graphs, greedy

Gluttony

constructive algorithms, greedy

Sum Graph

brute force, constructive algorithms, graphs, implementation, interactive, shortest paths, trees

Rudolf and Subway

constructive algorithms, dfs and similar, graphs, shortest paths

Drazil and Tiles

constructive algorithms, greedy

Ehab and another another xor problem

bitmasks, constructive algorithms, implementation, interactive

No Palindromes

brute force, constructive algorithms, divide and conquer, greedy, hashing, implementation, math, strings

Queue

constructive algorithms, dp

Destruction of a Tree

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

Ability To Convert

constructive algorithms, dp, greedy, math, strings

Petya and Construction Set

constructive algorithms, graphs, math, sortings, trees

Stack Sorting

constructive algorithms, data structures, greedy, implementation

Maximum Balanced Circle

constructive algorithms, dp, greedy, two pointers

Nene and the Mex Operator

bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math

Ant on the Tree

constructive algorithms, dfs and similar, trees

Maxim and Array

constructive algorithms, data structures, greedy, math

Copy of a Copy of a Copy

constructive algorithms, dfs and similar, graphs, implementation, sortings

Wrong Answer

constructive algorithms

Ithea Plays With Chtholly

binary search, constructive algorithms, games, greedy, interactive

Let's Play the Hat?

brute force, constructive algorithms, greedy, math

Dima and Containers

constructive algorithms, greedy, implementation

Dasha and Puzzle

constructive algorithms, dfs and similar, graphs, greedy, trees

Restoration of string

constructive algorithms, graphs, implementation

Gifts by the List

constructive algorithms, dfs and similar, graphs, trees

International Olympiad

constructive algorithms, greedy, implementation, math

Minimal Diameter Forest

constructive algorithms, dfs and similar, greedy, trees

Olya and magical square

constructive algorithms, implementation, math

Idempotent functions

constructive algorithms, graphs, math

Numbers

constructive algorithms, implementation

Journey

brute force, constructive algorithms, implementation

Parquet

combinatorics, constructive algorithms, greedy, implementation

Maxim and Matrix

constructive algorithms, dp, math

E-reader Display

constructive algorithms, greedy

Lucky Sorting

constructive algorithms, sortings

Team Arrangement

constructive algorithms, greedy, implementation

Merging Two Decks

constructive algorithms, greedy

Triminoes

constructive algorithms, greedy

Director

constructive algorithms, greedy

Playing with Superglue

combinatorics, constructive algorithms

Kotlinforces

*special problem, constructive algorithms, dp

Ciel the Commander

constructive algorithms, dfs and similar, divide and conquer, greedy, trees

Errich-Tac-Toe (Easy Version)

constructive algorithms, math

Police Stations

constructive algorithms, dfs and similar, dp, graphs, shortest paths, trees

Coloring Edges

constructive algorithms, dfs and similar, graphs

Binary Subsequence Rotation

binary search, constructive algorithms, data structures, greedy

Swaps Again

constructive algorithms, implementation, sortings

Binary Median

binary search, bitmasks, brute force, constructive algorithms

Nearest Beautiful Number (hard version)

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

Ehab's Last Corollary

constructive algorithms, dfs and similar, graphs, greedy, implementation, trees

The Winter Hike

constructive algorithms, greedy, math

Two Arrays

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

Painting the Array II

constructive algorithms, data structures, dp, greedy, implementation

Present

binary search, bitmasks, constructive algorithms, data structures, math, sortings

Destroying Roads

constructive algorithms, graphs, shortest paths

Challenges in school №41

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

01 Tree

constructive algorithms, data structures, dsu, greedy, sortings, trees

Height All the Same

combinatorics, constructive algorithms, math, matrices

Money Transfers

constructive algorithms, data structures, greedy, sortings

GCD Queries

constructive algorithms, interactive, number theory

Omkar and Duck

bitmasks, constructive algorithms, interactive, math

Permutation Shift

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

Points on Plane

constructive algorithms, divide and conquer, geometry, greedy, sortings

Decryption

constructive algorithms, implementation, math, number theory

MEX vs DIFF

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

XOR Break --- Solo Version

bitmasks, constructive algorithms, greedy

Send Boxes to Alice (Hard Version)

constructive algorithms, greedy, math, number theory, ternary search, two pointers

Minimax

constructive algorithms, greedy, strings

Treelabeling

bitmasks, constructive algorithms, dfs and similar, games, greedy, implementation, trees

Mahmoud and a xor trip

bitmasks, constructive algorithms, data structures, dfs and similar, dp, math, trees

Rectangular Congruence

constructive algorithms, number theory

Berland Beauty

constructive algorithms, dfs and similar, greedy, sortings, trees

ConstructOR

bitmasks, chinese remainder theorem, combinatorics, constructive algorithms, math, number theory

Domino (hard version)

constructive algorithms, implementation, math

The LCMs Must be Large

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

Timofey and rectangles

constructive algorithms, geometry

Clique Partition

brute force, constructive algorithms, graphs, greedy, implementation

String

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

Tree Constructing

constructive algorithms, graphs

Underground Lab

constructive algorithms, dfs and similar, graphs

Weird journey

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

Candy Party (Hard Version)

bitmasks, constructive algorithms, dp, greedy, implementation, math

Sand Fortress

binary search, constructive algorithms, math

Leha and another game about graph

constructive algorithms, data structures, dfs and similar, dp, graphs

The Harmonization of XOR

bitmasks, constructive algorithms, greedy, math

Autosynthesis

constructive algorithms, dfs and similar, graphs, greedy, sortings

Down or Right

constructive algorithms, interactive, matrices

Another Wine Tasting Event

combinatorics, constructive algorithms, math, strings

Santa Claus and a Palindrome

constructive algorithms, data structures, greedy

Permutation recovery

constructive algorithms, data structures, dfs and similar, graphs, greedy, math, sortings

Flawed Flow

constructive algorithms, flows, graphs, greedy

Invariance of Tree

constructive algorithms, dfs and similar, greedy, trees

Vladik and Favorite Game

constructive algorithms, dfs and similar, graphs, interactive

Tesla

constructive algorithms, implementation

Nice table

brute force, constructive algorithms, greedy, math

Below the Diagonal

constructive algorithms, greedy, math

Black and White Tree

constructive algorithms, dsu, graphs, greedy, trees

New Roads

constructive algorithms, graphs, trees

Job Lookup

constructive algorithms, dp, shortest paths, trees

Compartments

combinatorics, constructive algorithms, greedy, implementation