Bets

greedy, implementation

Good Trip

combinatorics, dp, math, probabilities

Peter and Snow Blower

binary search, geometry, ternary search

Best Pair

binary search, brute force, implementation

Minimal Segment Cover

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

Cats Transport

data structures, dp

Nash Matrix

constructive algorithms, dfs and similar, graphs, implementation

Suitable Replacement

binary search, greedy, implementation

Alyona and Strings

dp, strings

Interacdive Problem

binary search, constructive algorithms, interactive

Game with modulo

binary search, constructive algorithms, interactive

DZY Loves Fibonacci Numbers

data structures, math, number theory

Circular Spanning Tree

constructive algorithms, implementation, trees

Bookshelves

bitmasks, dp, greedy

Linguistics

greedy, implementation, sortings, strings

Enduring Exodus

binary search, two pointers

Bottles

dp

As Fast As Possible

binary search, math

Correct Bracket Sequence Editor

data structures, dsu, strings

Bottom-Tier Reversals

constructive algorithms, greedy

Bear and Two Paths

constructive algorithms, graphs

Decryption

constructive algorithms, implementation, math, number theory

Yet Another Array Queries Problem

data structures, implementation

Animals

dp, greedy

Timofey and Black-White Tree

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

Willem, Chtholly and Seniorious

data structures, probabilities

The Child and Zoo

dsu, sortings

...And after happily lived ever they

*special problem, bitmasks

Non-Palindromic Substring

hashing, implementation, math, strings

Vanya and Computer Game

binary search, implementation, math, sortings

Statues

dfs and similar

Common Number

binary search, combinatorics, dp, math

Numbers Joke

*special problem

Magic Five

combinatorics, math

Calendar Ambiguity

math, number theory

Colored Rooks

constructive algorithms, graphs

Lucky Permutation

constructive algorithms, math

About Bacteria

implementation, math

Count Paths

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

Shortest Path

graphs, shortest paths

Triangular Paths

constructive algorithms, graphs, math, shortest paths, sortings

Well-known Numbers

binary search, greedy, number theory

Volatile Kite

geometry

Restructuring Company

data structures, dsu

Pillars

binary search, data structures, dp, sortings, trees

Island Puzzle

constructive algorithms, implementation

Toy Sum

greedy, implementation, math

Tanya and Password

dfs and similar, graphs

Connect the Points

brute force, constructive algorithms, geometry

Fox and Card Game

games, greedy, sortings

Generating Sets

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

Grid Xor

constructive algorithms, greedy, implementation, interactive, math

Spanning Tree with One Fixed Degree

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

Foe Pairs

combinatorics, sortings, two pointers

Terse princess

constructive algorithms, greedy

More Wrong

divide and conquer, interactive

Graph Coloring

dfs and similar, dp, graphs

New Year Santa Network

combinatorics, dfs and similar, graphs, trees

Resort

graphs

Nezzar and Binary String

data structures, greedy

Magazine Ad

binary search, greedy

Captain Marmot

brute force, geometry

New Year and Fireworks

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

Build a Tree and That Is It

constructive algorithms, implementation, trees

Friends and Subsequences

binary search, data structures

Decreasing Heights

brute force, dp

Bracket Walk

data structures, greedy, strings

Equalizing Two Strings

constructive algorithms, sortings, strings

Mahmoud and Ehab and another array construction task

constructive algorithms, greedy, math, number theory

Petya and His Friends

constructive algorithms, math, number theory

Om Nom and Spiders

implementation, math

Yaroslav and Sequence

constructive algorithms

Four Segments

brute force, constructive algorithms, geometry, implementation, math

The Big Race

math

Space Formula

greedy

MEX vs DIFF

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

Sleepy Game

dfs and similar, dp, games, graphs

Number of Components

combinatorics, data structures, dp, math

Almost Triple Deletions

data structures, dp, greedy

Infinite Path

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

Gourmet choice

dfs and similar, dp, dsu, graphs, greedy

Naming Company

games, greedy, sortings

April Fools' Problem (easy)

greedy, sortings

Thanos Nim

games

Command Line Arguments

*special problem, implementation, strings

GCD on a grid

brute force, dfs and similar, dp, implementation, math, number theory

The Human Equation

greedy, implementation

Least Cost Bracket Sequence

greedy

XOR Break --- Solo Version

bitmasks, constructive algorithms, greedy

Game on Sum (Easy Version)

combinatorics, dp, games, math

Maximize!

binary search, greedy, ternary search, two pointers

Flag

brute force, combinatorics, dp, implementation

Merge Sort

constructive algorithms, divide and conquer

Five Dimensional Points

brute force, geometry, math

Message

brute force

Elections

greedy

Minimal Labels

data structures, dfs and similar, graphs, greedy

Coprime Subsequences

bitmasks, combinatorics, number theory

Exposition

binary search, data structures, dsu, trees, two pointers

Flying Sort (Easy Version)

dp, greedy, two pointers