Binary String Reconstruction

constructive algorithms, dfs and similar, math

Same Parity Summands

constructive algorithms, math

Slime and Hats

constructive algorithms, dp, greedy

Orac and Medians

constructive algorithms, greedy, math

Phoenix and Science

binary search, constructive algorithms, greedy, implementation, math

Phoenix and Distribution

constructive algorithms, greedy, sortings, strings

Phoenix and Beauty

constructive algorithms, data structures, greedy, sortings

Monopole Magnets

constructive algorithms, dfs and similar, dsu, graphs

Restore the Permutation by Sorted Segments

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

Balanced Array

constructive algorithms, math

Multiple Testcases

binary search, constructive algorithms, data structures, greedy, sortings, two pointers

Binary Period

constructive algorithms, strings

Nastya and Time Machine

constructive algorithms, dfs and similar, graphs, trees

Sorted Adjacent Differences

constructive algorithms, sortings

Nested Rubber Bands

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

Perfect Triples

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

Edge Weight Assignment

bitmasks, constructive algorithms, dfs and similar, greedy, math, trees

Ichihime and Triangle

constructive algorithms, math

Yui and Mahjong Set

constructive algorithms, interactive

Anti-Sudoku

constructive algorithms, implementation

Construct the String

constructive algorithms

Minimum Euler Cycle

constructive algorithms, graphs, greedy, implementation

Circle of Monsters

brute force, constructive algorithms, greedy, math

Road to 1600

brute force, constructive algorithms

Challenges in school №41

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

Little Artem

constructive algorithms

Height All the Same

combinatorics, constructive algorithms, math, matrices

Walk on Matrix

bitmasks, constructive algorithms, math

Composite Coloring

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

Dreamoon Likes Strings

constructive algorithms, data structures

Drazil Likes Heap

constructive algorithms, data structures, greedy, implementation

Dreamoon Likes Coloring

constructive algorithms, greedy, implementation, math

Carousel

constructive algorithms, dp, graphs, greedy, math

Game with Chips

constructive algorithms, implementation

Bad Ugly Numbers

constructive algorithms, number theory

Ehab's Last Theorem

constructive algorithms, dfs and similar, graphs, greedy

Ehab the Xorcist

bitmasks, constructive algorithms, greedy, number theory

Ehab and Path-etic MEXs

constructive algorithms, dfs and similar, greedy, trees

EhAb AnD gCd

constructive algorithms, greedy, number theory

Present

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

Remove Adjacent

brute force, constructive algorithms, greedy, strings

Nash Matrix

constructive algorithms, dfs and similar, graphs, implementation

Primitive Primes

constructive algorithms, math, ternary search

String Modification

brute force, constructive algorithms, implementation, sortings, strings

Different Rules

constructive algorithms, greedy, implementation, math

Bogosort

constructive algorithms, sortings

Construct the Binary Tree

brute force, constructive algorithms, trees

Kuroni and the Score Distribution

constructive algorithms, greedy, implementation, math

Kuroni and the Celebration

constructive algorithms, dfs and similar, interactive, trees

Kuroni and Simple Strings

constructive algorithms, greedy, strings, two pointers

Kuroni and the Gifts

brute force, constructive algorithms, greedy, sortings

Shortest and Longest LIS

constructive algorithms, graphs, greedy, two pointers

Longest Palindrome

brute force, constructive algorithms, greedy, implementation, strings

DAG

constructive algorithms

Time to Run

constructive algorithms, graphs, implementation

Berland Beauty

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

String Coloring (easy version)

constructive algorithms, dp, graphs, greedy, sortings

Rin and The Unknown Flower

constructive algorithms, greedy, interactive, math

Aroma's Search

brute force, constructive algorithms, geometry, greedy, implementation

Coffee Varieties (hard version)

constructive algorithms, graphs, interactive

Irreducible Anagrams

binary search, constructive algorithms, data structures, strings, two pointers

Red-Blue Graph

constructive algorithms, flows

Harry The Potter

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

Madhouse (Hard version)

brute force, constructive algorithms, hashing, interactive, math

Madhouse (Easy version)

brute force, constructive algorithms, interactive, math

Numbers on Tree

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

Delete a Segment

brute force, constructive algorithms, data structures, dp, graphs, sortings, trees, two pointers

DIY Garland

constructive algorithms, greedy, trees

Friends and Gifts

constructive algorithms, data structures, math

The Cake Is a Lie

constructive algorithms, data structures, dfs and similar, graphs

Enchanted Artifact

constructive algorithms, interactive, strings

Intergalactic Sliding Puzzle

combinatorics, constructive algorithms, math

Tests for problem D

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

Four Stones

constructive algorithms

Beautiful Rectangle

brute force, combinatorics, constructive algorithms, data structures, greedy, math

Snow Walking Robot

constructive algorithms, greedy, implementation

Xor on Figures

constructive algorithms, fft, math

Subset with Zero Sum

constructive algorithms, dfs and similar, graphs, math

Divide Points

constructive algorithms, geometry, math

Strange Device

constructive algorithms, interactive, math, sortings

Make Good

bitmasks, constructive algorithms, math

Interesting Subarray

constructive algorithms, greedy, math

Long Beautiful Integer

constructive algorithms, greedy, implementation, strings

Lexicography

constructive algorithms, strings

Intriguing Selection

brute force, constructive algorithms, implementation, interactive, sortings

Help BerLine

constructive algorithms

DevOps Best Practices

constructive algorithms

Cactus Revenge

constructive algorithms

Decreasing Debts

constructive algorithms, data structures, graphs, greedy, implementation, math, two pointers

Diverse Matrix

constructive algorithms, greedy, math, number theory

Dice Tower

constructive algorithms, math

Beautiful String

constructive algorithms, greedy

Beautiful Fibonacci Problem

constructive algorithms, number theory

Beautiful League

constructive algorithms, flows, graph matchings

Beautiful Sequence

brute force, constructive algorithms, greedy

Equalizing Two Strings

constructive algorithms, sortings, strings

League of Leesins

constructive algorithms, implementation

Point Ordering

constructive algorithms, geometry, interactive, math

Send Boxes to Alice (Hard Version)

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

Send Boxes to Alice (Easy Version)

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