Ilya and Two Numbers

constructive algorithms, data structures, dsu, greedy

Summer Homework

data structures, math

Awards For Contestants

brute force, data structures, dp

Summer Homework

data structures, math

Spring cleaning

*special problem, data structures, dfs and similar, graphs, trees

Dogecoin

*special problem, *special problem, binary search, data structures

Xenia and Tree

data structures, divide and conquer, trees

Tree and Queries

data structures, dfs and similar, trees

Buy Low Sell High

constructive algorithms, data structures, greedy

The Fair Nut and Rectangles

data structures, dp, geometry

One Occurrence

data structures, divide and conquer

Cats Transport

data structures, dp

DZY Loves Fibonacci Numbers

data structures, math, number theory

Blood Cousins Return

binary search, data structures, dfs and similar, dp, sortings

Lucky Queries

data structures

DZY Loves Colors

data structures

Till I Collapse

data structures, divide and conquer

Subarray Sorting

data structures, sortings

XOR Tree

bitmasks, data structures, dfs and similar, dsu, greedy, trees

Kindergarten

data structures, dp, greedy

Voting (Hard Version)

binary search, data structures, greedy

Imbalance Value of a Tree

data structures, dsu, graphs, trees

Fruit Sequences

binary search, data structures, divide and conquer, dp, two pointers

Divide Square

data structures, geometry, implementation, sortings

Complicated Computations

binary search, data structures, two pointers

New Year Tree

data structures, divide and conquer, trees

Are You Fired?

constructive algorithms, data structures, greedy, implementation

Editorial for Two

binary search, data structures, greedy, implementation

DeadLee

data structures, dfs and similar, greedy, implementation, sortings

Bindian Signalizing

data structures

Bombs

data structures, two pointers

Ball

data structures, sortings

Omkar and Landslide

binary search, constructive algorithms, data structures, greedy, math

Avoid Rainbow Cycles

data structures, dsu, graphs, greedy, sortings, trees

Copy or Prefix Sum

combinatorics, data structures, dp, sortings

William The Oblivious

bitmasks, data structures, dp, matrices

Please, another Queries on Array?

bitmasks, data structures, divide and conquer, math, number theory

Colorful Operations

brute force, data structures, implementation

Range Sorting (Hard Version)

binary search, data structures, dp, greedy

Xor-Subsequence (hard version)

bitmasks, data structures, dp, strings, trees

String Set Queries

brute force, data structures, hashing, interactive, string suffix structures, strings

A-Z Graph

constructive algorithms, data structures, graphs, hashing

Chopping Carrots (Hard Version)

brute force, constructive algorithms, data structures, dp, greedy, math, number theory, two pointers

Arthur and Walls

constructive algorithms, data structures, graphs, greedy, shortest paths

Network Coverage

binary search, constructive algorithms, data structures, greedy

Lucky Array

data structures

Long Way Home

data structures, divide and conquer, dp, geometry, graphs, greedy, shortest paths

Fair Share

constructive algorithms, data structures, dfs and similar, graph matchings, graphs

Minimum Array

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

Jamie and Tree

data structures, trees

Tonya and Burenka-179

data structures, greedy, math, number theory

Cross Swapping

2-sat, data structures, dsu, greedy, matrices

Drazil Likes Heap

constructive algorithms, data structures, greedy, implementation

Walk the Runway

bitmasks, brute force, data structures, dp, graphs, implementation, sortings

Intersection of Permutations

data structures

Reverse and Swap

binary search, bitmasks, data structures

The Untended Antiquity

data structures, hashing

Spanning Tree Queries

binary search, data structures, dfs and similar, dsu, graphs, greedy, math, sortings, trees

Flying Sort (Hard Version)

binary search, data structures, dp, greedy, sortings, two pointers

Ina of the Mountain

data structures, dp, greedy, math

Purple Crayon

data structures, dfs and similar, games, graphs, greedy, math, sortings, trees

Palindromes in a Tree

bitmasks, data structures, divide and conquer, trees

Balance (Hard version)

brute force, data structures, number theory

Linear Kingdom Races

data structures, dp

Split the Tree

binary search, data structures, dp, greedy, trees

Bracket Cost

binary search, data structures, divide and conquer, dp, greedy, strings

Little Elephant and Inversions

data structures, two pointers

RBS

binary search, bitmasks, brute force, data structures, dp

Josuke and Complete Graph

binary search, brute force, data structures, math, number theory

Fast Travel Text Editor

data structures, dfs and similar, graphs, shortest paths

Animal Observation (hard version)

data structures, dp, greedy

Leaf Sets

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

Restore the Permutation by Sorted Segments

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

Good Subarrays (Hard Version)

binary search, data structures, dp, two pointers

Happy Tree Party

data structures, dfs and similar, graphs, math, trees

Rooks and Rectangles

data structures, sortings

Distance Learning Courses in MAC

bitmasks, brute force, data structures, greedy, math

Beautiful Mirrors with queries

data structures, probabilities

Distance Tree (easy version)

binary search, data structures, dfs and similar, graphs, shortest paths, trees

Acyclic Organic Compounds

data structures, dfs and similar, dsu, hashing, strings, trees

Developing Game

data structures

King Kog's Reception

data structures

Permutation and Queries

brute force, data structures, divide and conquer, two pointers

Traffic Jams in the Land

data structures, dp, number theory

Pokémon Arena

data structures, graphs, greedy, implementation, shortest paths, sortings

Inversions After Shuffle

data structures, probabilities

Three strings

data structures, dsu, string suffix structures, strings

Little Elephant and Tree

data structures, dfs and similar, trees

House Planning

constructive algorithms, data structures, graph matchings, greedy

Magician and Pigs (Easy Version)

brute force, data structures, implementation

Sonya and Ice Cream

binary search, data structures, dp, greedy, shortest paths, trees

Frequency Queries

data structures, dfs and similar, trees

Labeling the Tree with Distances

data structures, dp, greedy, hashing, implementation, trees

Garlands

data structures

Vasya and Maximum Profit

binary search, constructive algorithms, data structures, dp, dsu

Choose a Square

binary search, data structures, sortings

New Year and the Acquaintance Estimation

binary search, data structures, graphs, greedy, implementation, math, sortings

Deduction Queries

data structures, dsu

The Cake Is a Lie

constructive algorithms, data structures, dfs and similar, graphs

Greedy Subsequences

data structures, dp, trees