Array Walk

brute force, dp, greedy

a-Good String

bitmasks, brute force, divide and conquer, dp, implementation

Create The Teams

brute force, dp, greedy, implementation, sortings

Maximum Sum on Even Positions

divide and conquer, dp, greedy, implementation

Polygon

dp, graphs, implementation, shortest paths

Orac and Models

dp, math, number theory

Linova and Kingdom

dfs and similar, dp, greedy, sortings, trees

Journey Planning

data structures, dp, greedy, math, sortings

Homecoming

binary search, dp, greedy, strings

Skyscrapers (easy version)

brute force, data structures, dp, greedy

Cow and Message

brute force, dp, math, strings

Air Conditioner

dp, greedy, implementation, sortings, two pointers

Obtain The String

dp, greedy, strings

Two Arrays

combinatorics, dp

Just Eat It!

dp, greedy, implementation

New Year and Ascent Sequence

binary search, combinatorics, data structures, dp, implementation, sortings

K for the Price of One (Hard Version)

dp, greedy, sortings

K for the Price of One (Easy Version)

dp, greedy, sortings

As Simple as One and Two

dp, greedy

Remove One Element

brute force, dp

Sweets Eating

dp, greedy, math, sortings

Constanze's Machine

dp

Standard Free2play

dp, greedy, math

Pipes

dp, implementation

The Number of Products

combinatorics, dp, implementation

Gas Pipeline

dp, greedy

RGB Substring (hard version)

data structures, dp, implementation, two pointers

Basketball Exercise

dp

Candies!

data structures, dp, implementation, math

WOW Factor

dp, strings

Lose it!

dp, greedy, implementation

Dima and a Bad XOR

bitmasks, brute force, constructive algorithms, dp

Sasha and a Bit of Relax

dp, implementation

Diverse Garland

constructive algorithms, dp, greedy

Ayoub and Lost Array

combinatorics, dp, math

The Fair Nut and String

combinatorics, dp, implementation

Colorful Bricks

combinatorics, dp, math

Decorate Apple Tree

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

Vasya and Multisets

brute force, dp, greedy, implementation, math

Shashlik Cooking

dp, greedy, math

Equalize

dp, greedy, strings

Permutation Game

brute force, dp, games

Polycarp and Div 3

dp, greedy, number theory

Bishwock

dp, greedy

Three displays

brute force, dp, implementation

Cut 'em all!

dfs and similar, dp, graphs, greedy, trees

Our Tanya is Crying Out Loud

dp, greedy

Chat

*special problem, dp

Party Lemonade

bitmasks, dp, greedy

Pride

brute force, dp, greedy, math, number theory

Almost Identity Permutations

combinatorics, dp, math

Nikita and string

brute force, dp

Balanced Substring

dp, implementation

Maximum splitting

dp, greedy, math, number theory

Qualification Rounds

bitmasks, brute force, constructive algorithms, dp

Pie Rules

dp, games

Did you mean...

dp, greedy, implementation

Marvolo Gaunt's Ring

brute force, data structures, dp

Journey

dfs and similar, dp, graphs, probabilities, trees

Star sky

dp, implementation

Really Big Numbers

binary search, brute force, dp, math

An impassioned circulation of affection

brute force, dp, strings, two pointers

Sagheer, the Hausmeister

bitmasks, brute force, dp

Mike and strings

brute force, dp, strings

Odd sum

dp, greedy, implementation

Functions again

dp, two pointers

Alyona and Spreadsheet

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

Game of Credit Cards

data structures, dp, greedy, sortings

Timofey and a tree

dfs and similar, dp, dsu, graphs, implementation, trees

Dasha and Password

brute force, dp, implementation

Travel Card

binary search, dp

Arpa's weak amphitheater and Mehrdad's valuable Hoses

dfs and similar, dp, dsu

Anton and Making Potions

binary search, dp, greedy, two pointers

Hard problem

dp, strings

Vacations

dp

Alyona and the Tree

dfs and similar, dp, graphs, trees

Vasya and String

binary search, dp, strings, two pointers

Simple Strings

dp, greedy, strings

Hard Process

binary search, dp, two pointers

Bear and Compressing

brute force, dfs and similar, dp, strings

Running with Obstacles

*special problem, data structures, dp, greedy

New Skateboard

dp

Cards

constructive algorithms, dp, math

Longtail Hedgehog

dp, graphs

New Year and Domino

dp, implementation

Chain Reaction

binary search, dp

Alternative Thinking

dp, greedy, math

Approximating a Constant Range

dp, implementation, two pointers

Restaurant

dp, greedy, sortings

Bear and Blocks

binary search, data structures, dp, math

Clique in the Divisibility Graph

dp, math, number theory

Kyoya and Colored Balls

combinatorics, dp, math

Divisibility by Eight

brute force, dp, math

Two Substrings

brute force, dp, greedy, implementation, strings

Mike and Fun

brute force, dp, greedy, implementation

Woodcutters

dp, greedy

Quasi Binary

constructive algorithms, dp, greedy, implementation

Covered Path

dp, greedy, math

Mr. Kitayuta's Colorful Graph

dfs and similar, dp, dsu, graphs

Given Length and Sum of Digits...

dp, greedy, implementation