The least round way

dp, math

Odd-Even Subsequence

binary search, dp, dsu, greedy, implementation

Yet Another Yet Another Task

data structures, dp, implementation, two pointers

Prefixes and Suffixes

dp, string suffix structures, strings, two pointers

Clear the String

dp

Minimax Problem

binary search, bitmasks, dp

Tree Shuffling

dfs and similar, dp, greedy, trees

Book of Evil

dfs and similar, divide and conquer, dp, trees

Domino for Young

dp, greedy, math

The Hard Work of Paparazzi

dp

Red-Green Towers

dp

Choosing flowers

binary search, brute force, data structures, dfs and similar, dp, greedy, sortings, two pointers

Three Paths on a Tree

dfs and similar, dp, greedy, trees

Appleman and Tree

dfs and similar, dp, trees

Square Subsets

bitmasks, combinatorics, dp, math

Number of Subsequences

combinatorics, dp, strings

Chip Move

brute force, dp, math

Generate a String

dfs and similar, dp

505

bitmasks, brute force, constructive algorithms, dp, greedy, implementation

String Coloring (hard version)

data structures, dp

Keep the Average High

dp, greedy, math

Little Pony and Harmony Chest

bitmasks, brute force, dp

Subsequences (easy version)

dp, graphs, implementation, shortest paths

Chocolate Bar

brute force, dp

Accommodation

brute force, dp, greedy, implementation

GCD Counting

data structures, dfs and similar, dp, number theory, trees

Divide by Three

dp, greedy, math, number theory

XOR Inverse

bitmasks, data structures, divide and conquer, dp, greedy, math, sortings, strings, trees

Searchlights

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

Different Arrays

brute force, dp, implementation

Wish I Knew How to Sort

dp, math, probabilities

Fire

dp, sortings

The Contest

data structures, dp, greedy

Maximize the Remaining String

brute force, data structures, dp, greedy, strings

Array Queries

brute force, data structures, dp

Buds Re-hanging

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

Robot in a Hallway

data structures, dp, greedy, implementation, ternary search

Increasing Frequency

binary search, dp, greedy

Number With The Given Amount Of Divisors

brute force, dp, number theory

Zero-One (Hard Version)

dp, greedy

Roman and Numbers

bitmasks, brute force, combinatorics, dp, number theory

Masha-forgetful

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

Sequence Sorting

dp, greedy, two pointers

Yet Another Division Into Teams

dp, greedy, sortings

Babaei and Birthday Cake

data structures, dp

Hanoi Factory

brute force, data structures, dp, greedy, sortings

Maximum Subarray

data structures, dp, greedy, two pointers

Fixed Points

binary search, brute force, dp

Small GCD

bitmasks, brute force, dp, math, number theory

Range Sorting (Easy Version)

binary search, dp, dsu, greedy, trees, two pointers

Moving Chips

bitmasks, dp, greedy

Pchelyonok and Segments

binary search, data structures, dp, greedy, math

Weight the Tree

constructive algorithms, dfs and similar, dp, implementation, trees

Cashback

data structures, dp, greedy, math

Glass Half Spilled

dp

Strip

binary search, data structures, dp, two pointers

Let's Play Osu!

dp, math, probabilities

Lucky Common Subsequence

dp, strings

Mahmoud and a Dictionary

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

Counting Arrays

combinatorics, dp, math, number theory

Looking for Order

bitmasks, dp

Count Paths

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

Pillars

binary search, data structures, dp, sortings, trees

Gourmet choice

dfs and similar, dp, dsu, graphs, greedy

Sergey and Subway

dfs and similar, dp, trees

Doremy's Drying Plan (Easy Version)

brute force, data structures, dp, greedy, sortings

Vasya and Good Sequences

bitmasks, dp

Unusual Sequences

bitmasks, combinatorics, dp, math, number theory

Roman Digits

brute force, combinatorics, dp, greedy, math

Famil Door and Brackets

dp, strings

Queue

constructive algorithms, dp

Wet Shark and Blocks

dp, matrices

Rotate Columns (easy version)

bitmasks, brute force, dp, greedy, sortings

Levko and Array

binary search, dp

Destruction of a Tree

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

Nene and the Mex Operator

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

Games with Rectangle

combinatorics, dp

Ability To Convert

constructive algorithms, dp, greedy, math, strings

Choosing Balls

dp

Graph Cost

dp, greedy, math, number theory

Relay Race

dp

Doremy's Pegging Game

combinatorics, dp, math

Lynyrd Skynyrd

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

Not Quite Lee

combinatorics, dp, math, number theory

Obsessive String

dp, strings

Fibonacci-ish

brute force, dp, hashing, implementation, math

Minimization

dp, greedy, sortings

New Year and Ancient Prophecy

dp, hashing, strings

Maximum Balanced Circle

constructive algorithms, dp, greedy, two pointers

Cards and Joy

dp

Messages

brute force, dp, greedy, probabilities, sortings

Remove Directed Edges

dfs and similar, dp, graphs

Berzerk

dfs and similar, dp, games

Work Group

dfs and similar, dp, graphs, strings, trees

The World Is Just a Programming Task (Easy Version)

brute force, dp, greedy, implementation

Cipher

combinatorics, dp

Running Track

dp, greedy, strings, trees

An overnight dance in discotheque

dfs and similar, dp, geometry, greedy, trees

Roma and Poker

dp, graphs

Yaroslav and Two Strings

combinatorics, dp