Encryption (medium)

dp

First Digit Law

dp, math, probabilities

Fragile Bridges

dp

Interesting Game

dp, games, math

Neural Network country

dp, matrices

New Year Letter

bitmasks, brute force, dp

Big Maximum Sum

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

Little Elephant and LCM

binary search, combinatorics, dp, math

Sereja and Subsequences

data structures, dp

Beaver Game

dp, games, number theory

Mike and Geometry Problem

combinatorics, data structures, dp, geometry, implementation

Elongated Matrix

binary search, bitmasks, brute force, dp, graphs

Two out of Three

dp

Olympiad in Programming and Sports

dp, flows, graphs, greedy

Helga Hufflepuff's Cup

dp, trees

Sums of Digits

dp, greedy, implementation

Stripe 2

binary search, dp, sortings

PLEASE

combinatorics, dp, implementation, math, matrices

Yaroslav and Two Strings

combinatorics, dp

Roma and Poker

dp, graphs

An overnight dance in discotheque

dfs and similar, dp, geometry, greedy, trees

Running Track

dp, greedy, strings, trees

Cipher

combinatorics, dp

The World Is Just a Programming Task (Easy Version)

brute force, dp, greedy, implementation

Work Group

dfs and similar, dp, graphs, strings, trees

Berzerk

dfs and similar, dp, games

Remove Directed Edges

dfs and similar, dp, graphs

Messages

brute force, dp, greedy, probabilities, sortings

Cards and Joy

dp

Maximum Balanced Circle

constructive algorithms, dp, greedy, two pointers

New Year and Ancient Prophecy

dp, hashing, strings

Minimization

dp, greedy, sortings

Fibonacci-ish

brute force, dp, hashing, implementation, math

Obsessive String

dp, strings

Not Quite Lee

combinatorics, dp, math, number theory

Lynyrd Skynyrd

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

Doremy's Pegging Game

combinatorics, dp, math

Relay Race

dp

Graph Cost

dp, greedy, math, number theory

Choosing Balls

dp

Ability To Convert

constructive algorithms, dp, greedy, math, strings

Games with Rectangle

combinatorics, dp

Destruction of a Tree

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

Levko and Array

binary search, dp

Rotate Columns (easy version)

bitmasks, brute force, dp, greedy, sortings

Wet Shark and Blocks

dp, matrices

Queue

constructive algorithms, dp

Famil Door and Brackets

dp, strings

Nene and the Mex Operator

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

Roman Digits

brute force, combinatorics, dp, greedy, math

Vasya and Good Sequences

bitmasks, dp

Unusual Sequences

bitmasks, combinatorics, dp, math, number theory

Sergey and Subway

dfs and similar, dp, trees

Doremy's Drying Plan (Easy Version)

brute force, data structures, dp, greedy, sortings

Gourmet choice

dfs and similar, dp, dsu, graphs, greedy

Pillars

binary search, data structures, dp, sortings, trees

Count Paths

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

Looking for Order

bitmasks, dp

Counting Arrays

combinatorics, dp, math, number theory

Mahmoud and a Dictionary

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

Lucky Common Subsequence

dp, strings

Let's Play Osu!

dp, math, probabilities

Strip

binary search, data structures, dp, two pointers

Glass Half Spilled

dp

Cashback

data structures, dp, greedy, math

Weight the Tree

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

Pchelyonok and Segments

binary search, data structures, dp, greedy, math

Moving Chips

bitmasks, dp, greedy

Range Sorting (Easy Version)

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

Small GCD

bitmasks, brute force, dp, math, number theory

Fixed Points

binary search, brute force, dp

Maximum Subarray

data structures, dp, greedy, two pointers

Hanoi Factory

brute force, data structures, dp, greedy, sortings

Babaei and Birthday Cake

data structures, dp

Yet Another Division Into Teams

dp, greedy, sortings

Sequence Sorting

dp, greedy, two pointers

Masha-forgetful

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

Roman and Numbers

bitmasks, brute force, combinatorics, dp, number theory

Zero-One (Hard Version)

dp, greedy

Number With The Given Amount Of Divisors

brute force, dp, number theory

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

Array Queries

brute force, data structures, dp

Maximize the Remaining String

brute force, data structures, dp, greedy, strings

The Contest

data structures, dp, greedy

Fire

dp, sortings

Wish I Knew How to Sort

dp, math, probabilities

Different Arrays

brute force, dp, implementation

Searchlights

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

XOR Inverse

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

Divide by Three

dp, greedy, math, number theory

GCD Counting

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

Accommodation

brute force, dp, greedy, implementation

Chocolate Bar

brute force, dp

Subsequences (easy version)

dp, graphs, implementation, shortest paths

Little Pony and Harmony Chest

bitmasks, brute force, dp

Keep the Average High

dp, greedy, math

String Coloring (hard version)

data structures, dp

505

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