Music Festival

binary search, data structures, dp, greedy, sortings

Alternating Sum

math, number theory

Vitya and Strange Lesson

binary search, data structures

Cookies

math

Hills

dp

Strange Game On Matrix

greedy, two pointers

Letter Exchange

constructive algorithms

Score of a Tree

bitmasks, combinatorics, dfs and similar, dp, math, probabilities, trees

Cats Transport

data structures, dp

Good Trip

combinatorics, dp, math, probabilities

Facetook Priority Wall

expression parsing, implementation, strings

Simple Subset

constructive algorithms, greedy, number theory

Holidays

implementation

Nash Matrix

constructive algorithms, dfs and similar, graphs, implementation

Kamil and Making a Stream

math, number theory, trees

Vladik and Memorable Trip

dp, implementation

Travelling Salesman Problem

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

Party

constructive algorithms, graphs, math

Minimal Segment Cover

data structures, dfs and similar, divide and conquer, dp, greedy, implementation, trees

Recover the String

constructive algorithms, greedy, implementation, math

Lost Arithmetic Progression

combinatorics, math, number theory

Replacing Digits

greedy

Bets

greedy, implementation

Lucky Tree

dp, dsu, trees

Best Pair

binary search, brute force, implementation

Peter and Snow Blower

binary search, geometry, ternary search

DZY Loves Fibonacci Numbers

data structures, math, number theory

Suitable Replacement

binary search, greedy, implementation

Interacdive Problem

binary search, constructive algorithms, interactive

Circular Spanning Tree

constructive algorithms, implementation, trees

Alyona and Strings

dp, strings

Game with modulo

binary search, constructive algorithms, interactive

Count Paths

data structures, dfs and similar, dp, dsu, graphs, trees

Bookshelves

bitmasks, dp, greedy

Equal XOR Segments

binary search, data structures

Gourmet choice

dfs and similar, dp, dsu, graphs, greedy

Linguistics

greedy, implementation, sortings, strings

Willem, Chtholly and Seniorious

data structures, probabilities

Correct Bracket Sequence Editor

data structures, dsu, strings

Enduring Exodus

binary search, two pointers

Bottom-Tier Reversals

constructive algorithms, greedy

Bottles

dp

Timofey and Black-White Tree

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

Thanos Nim

games

Animals

dp, greedy

As Fast As Possible

binary search, math

Bear and Two Paths

constructive algorithms, graphs

Decryption

constructive algorithms, implementation, math, number theory

Yet Another Array Queries Problem

data structures, implementation

The Child and Zoo

dsu, sortings

...And after happily lived ever they

*special problem, bitmasks

Statues

dfs and similar

Vanya and Computer Game

binary search, implementation, math, sortings

Colored Rooks

constructive algorithms, graphs

Numbers Joke

*special problem

Pillars

binary search, data structures, dp, sortings, trees

Shortest Path

graphs, shortest paths

Common Number

binary search, combinatorics, dp, math

Spanning Tree with One Fixed Degree

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

About Bacteria

implementation, math

Magic Five

combinatorics, math

Calendar Ambiguity

math, number theory

Lucky Permutation

constructive algorithms, math

Well-known Numbers

binary search, greedy, number theory

Nene and the Mex Operator

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

Triangular Paths

constructive algorithms, graphs, math, shortest paths, sortings

Restructuring Company

data structures, dsu

Foe Pairs

combinatorics, sortings, two pointers

Four Segments

brute force, constructive algorithms, geometry, implementation, math

Volatile Kite

geometry

Tanya and Password

dfs and similar, graphs

Island Puzzle

constructive algorithms, implementation

Fox and Card Game

games, greedy, sortings

Toy Sum

greedy, implementation, math

Generating Sets

binary search, data structures, dfs and similar, greedy, strings, trees

More Wrong

divide and conquer, interactive

Connect the Points

brute force, constructive algorithms, geometry

Rectangle Painting 1

dp

Resort

graphs

Grid Xor

constructive algorithms, greedy, implementation, interactive, math

Bracket Walk

data structures, greedy, strings

Magazine Ad

binary search, greedy

Build a Tree and That Is It

constructive algorithms, implementation, trees

XOR Break --- Solo Version

bitmasks, constructive algorithms, greedy

Nezzar and Binary String

data structures, greedy

Captain Marmot

brute force, geometry

New Year Santa Network

combinatorics, dfs and similar, graphs, trees

Terse princess

constructive algorithms, greedy

Infinite Path

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

Equalizing Two Strings

constructive algorithms, sortings, strings

Graph Coloring

dfs and similar, dp, graphs

Friends and Subsequences

binary search, data structures

Decreasing Heights

brute force, dp

New Year and Fireworks

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

Petya and His Friends

constructive algorithms, math, number theory

Mahmoud and Ehab and another array construction task

constructive algorithms, greedy, math, number theory

Om Nom and Spiders

implementation, math

Yaroslav and Sequence

constructive algorithms

Number of Components

combinatorics, data structures, dp, math

MEX vs DIFF

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