a-Good String

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

Unmerge

dp

Create The Teams

brute force, dp, greedy, implementation, sortings

Maximum Sum on Even Positions

divide and conquer, dp, greedy, implementation

Spy-string

bitmasks, brute force, constructive algorithms, dp, hashing, strings

Polygon

dp, graphs, implementation, shortest paths

Young Explorers

dp, greedy, sortings

Ternary String

binary search, dp, implementation, two pointers

Orac and Models

dp, math, number theory

Magic Tricks

*special problem, dp, graphs

Alternating Subsequence

dp, greedy, two pointers

Nastya and Scoreboard

bitmasks, dp, graphs, greedy

Linova and Kingdom

dfs and similar, dp, greedy, sortings, trees

Three Blocks Palindrome (hard version)

brute force, data structures, dp, two pointers

Three Blocks Palindrome (easy version)

binary search, brute force, data structures, dp, two pointers

Carousel

constructive algorithms, dp, graphs, greedy, math

Count The Blocks

combinatorics, dp, math

Maximum White Subtree

dfs and similar, dp, graphs, trees

Sleeping Schedule

dp, implementation

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

String Coloring (easy version)

constructive algorithms, dp, graphs, greedy, sortings

Obtain The String

dp, greedy, strings

Two Arrays

combinatorics, dp

Garland

dp, greedy, sortings

Just Eat It!

dp, greedy, implementation

New Year and Ascent Sequence

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

New Year Parties

dp, greedy

K for the Price of One (Hard Version)

dp, greedy, sortings

K for the Price of One (Easy Version)

dp, greedy, sortings

Berry Jam

data structures, dp, greedy, implementation

As Simple as One and Two

dp, greedy

Remove One Element

brute force, dp

Yet Another Broken Keyboard

combinatorics, dp, implementation

Yet Another Monster Killing Problem

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

Sweets Eating

dp, greedy, math, sortings

By Elevator or Stairs?

dp, shortest paths

Constanze's Machine

dp

Restricted RPS

constructive algorithms, dp, greedy

Paint the Tree

brute force, constructive algorithms, dp, graphs, implementation, trees

Ivan the Fool and the Probability Theory

combinatorics, dp, math

Standard Free2play

dp, greedy, math

Pipes

dp, implementation

Make The Fence Great Again

dp

The Number of Products

combinatorics, dp, implementation

Gas Pipeline

dp, greedy

Anna, Svyatoslav and Maps

dp, graphs, greedy, shortest paths

You Are Given a Decimal String...

brute force, dp, shortest paths

Block Adventure

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

Minimum Triangulation

dp, greedy, math

K Balanced Teams

dp, sortings, two pointers

Sasha and a Bit of Relax

dp, implementation

Diverse Garland

constructive algorithms, dp, greedy

Compression

dp, implementation, math, number theory

Ayoub and Lost Array

combinatorics, dp, math

Petr and a Combination Lock

bitmasks, brute force, dp

Easy Problem

dp

New Year and the Permutation Concatenation

combinatorics, dp, math

The Fair Nut and String

combinatorics, dp, implementation

The Fair Nut and the Best Path

data structures, dp, trees

Colorful Bricks

combinatorics, dp, math

Multiplicity

data structures, dp, implementation, math, number theory

Decorate Apple Tree

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

Bicolorings

bitmasks, dp

Vasya and Multisets

brute force, dp, greedy, implementation, math

Vitamins

bitmasks, brute force, dp, implementation

Shashlik Cooking

dp, greedy, math

Slime

dp, greedy, implementation

Equalize

dp, greedy, strings

Permutation Game

brute force, dp, games

Playing Piano

constructive algorithms, dp

Creating the Contest

dp, greedy, math

Vasya And The Mushrooms

dp, implementation

Stars Drawing (Easy Edition)

brute force, dp, greedy

Polycarp and Div 3

dp, greedy, number theory

Cutting

dp, greedy, sortings

Bishwock

dp, greedy

Three displays

brute force, dp, implementation

XOR-pyramid

dp

Cut 'em all!

dfs and similar, dp, graphs, greedy, trees

Consecutive Subsequence

dp

Lecture Sleep

data structures, dp, implementation, two pointers

Timetable

dp

Our Tanya is Crying Out Loud

dp, greedy

A Twisty Movement

dp

Chat

*special problem, dp

Riverside Curio

data structures, dp, greedy

Substring

dfs and similar, dp, graphs

MADMAX

dfs and similar, dp, games, graphs

The Monster

dp, greedy, implementation, math

Permute Digits

dp, greedy