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

Chocolate Bar

brute force, dp

Subsequences (easy version)

dp, graphs, implementation, shortest paths

Little Pony and Harmony Chest

bitmasks, 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

Different Arrays

brute force, dp, implementation

XOR Inverse

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

Wish I Knew How to Sort

dp, math, probabilities

Searchlights

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

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

Increasing Frequency

binary search, dp, greedy

Robot in a Hallway

data structures, dp, greedy, implementation, ternary search

Buds Re-hanging

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

Zero-One (Hard Version)

dp, greedy

Number With The Given Amount Of Divisors

brute force, dp, number theory

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

Maximum Subarray

data structures, dp, greedy, two pointers

Yet Another Division Into Teams

dp, greedy, sortings

Hanoi Factory

brute force, data structures, dp, greedy, sortings

Babaei and Birthday Cake

data structures, dp

Small GCD

bitmasks, brute force, dp, math, number theory

Fixed Points

binary search, brute force, dp

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

Nene and the Mex Operator

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

Counting Arrays

combinatorics, dp, math, number theory

Mahmoud and a Dictionary

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

Looking for Order

bitmasks, dp

Count Paths

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

Gourmet choice

dfs and similar, dp, dsu, graphs, greedy

Pillars

binary search, data structures, dp, sortings, trees

Doremy's Drying Plan (Easy Version)

brute force, data structures, dp, greedy, sortings

Unusual Sequences

bitmasks, combinatorics, dp, math, number theory

Sergey and Subway

dfs and similar, dp, trees

Vasya and Good Sequences

bitmasks, dp

Roman Digits

brute force, combinatorics, dp, greedy, math

Rotate Columns (easy version)

bitmasks, brute force, dp, greedy, sortings

Lynyrd Skynyrd

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

Relay Race

dp

Famil Door and Brackets

dp, strings

Queue

constructive algorithms, dp

Wet Shark and Blocks

dp, matrices

Levko and Array

binary search, dp

Destruction of a Tree

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

Games with Rectangle

combinatorics, dp

Ability To Convert

constructive algorithms, dp, greedy, math, strings

Choosing Balls

dp

Graph Cost

dp, greedy, math, number theory

Doremy's Pegging Game

combinatorics, dp, math

Not Quite Lee

combinatorics, dp, math, number theory

Obsessive String

dp, strings

Fibonacci-ish

brute force, dp, hashing, implementation, math

Cards and Joy

dp

Maximum Balanced Circle

constructive algorithms, dp, greedy, two pointers

Minimization

dp, greedy, sortings

New Year and Ancient Prophecy

dp, hashing, strings

Remove Directed Edges

dfs and similar, dp, graphs

Messages

brute force, dp, greedy, probabilities, sortings

Berzerk

dfs and similar, dp, games

Work Group

dfs and similar, dp, graphs, strings, trees

Cipher

combinatorics, dp

The World Is Just a Programming Task (Easy Version)

brute force, dp, greedy, implementation

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

PLEASE

combinatorics, dp, implementation, math, matrices

Stripe 2

binary search, dp, sortings

Sums of Digits

dp, greedy, implementation

Helga Hufflepuff's Cup

dp, trees

Olympiad in Programming and Sports

dp, flows, graphs, greedy

Two out of Three

dp

Elongated Matrix

binary search, bitmasks, brute force, dp, graphs

Mike and Geometry Problem

combinatorics, data structures, dp, geometry, implementation

Beaver Game

dp, games, number theory

Sereja and Subsequences

data structures, dp

Little Elephant and LCM

binary search, combinatorics, dp, math

Big Maximum Sum

data structures, dp, greedy, implementation, math, trees

New Year Letter

bitmasks, brute force, dp

Neural Network country

dp, matrices