Erase Subsequences

dp, strings

Thief in a Shop

divide and conquer, dp, fft, math

Fibonacci-ish

brute force, dp, hashing, implementation, math

Makoto and a Blackboard

dp, math, number theory, probabilities

Playlist for Polycarp (easy version)

bitmasks, combinatorics, dp

Flexible String Revisit

combinatorics, dp, math, probabilities

Shovels Shop

dp, greedy, sortings

Tourism

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

Road Improvement

dp, trees

Priority Queue

combinatorics, dp, implementation, math, ternary search

Decoding Genome

dp, matrices

Minimization

dp, greedy, sortings

Product Oriented Recurrence

dp, math, matrices, number theory

Maximum Balanced Circle

constructive algorithms, dp, greedy, two pointers

Counting Rectangles is Fun

brute force, divide and conquer, dp

Cards and Joy

dp

Escape Through Leaf

data structures, dp, geometry

Paint the Tree

dp, sortings, trees

Upgrading Array

dp, greedy, math, number theory

New Year and Ancient Prophecy

dp, hashing, strings

Equilibrium

data structures, dp, greedy

Chat

*special problem, dp

Count Binary Strings

data structures, dp

Another Filling the Grid

combinatorics, dp, math

Buses

binary search, data structures, dp

Tree Array

brute force, combinatorics, dp, graphs, math, probabilities, trees

Let's Go Rolling!

dp, sortings

Sum Over Zero

data structures, dfs and similar, dp

Ezzat and Grid

data structures, dp, greedy

Karen and Supermarket

brute force, dp, trees

Colorings and Dominoes

combinatorics, dp, greedy, math

Koa and the Beach (Hard Version)

constructive algorithms, dp, greedy, implementation

Kindergarten

data structures, dp, greedy

Perfect Groups

dp, math, number theory

Anthem of Berland

dp, strings

Divisible by Twenty-Five

brute force, dfs and similar, dp

Messages

brute force, dp, greedy, probabilities, sortings

Learning to Paint

binary search, data structures, dfs and similar, dp, greedy, implementation, sortings

Monster Invaders

dp, greedy, implementation

Remove Directed Edges

dfs and similar, dp, graphs

Segment Sum

bitmasks, combinatorics, dp, math

Neko and Aki's Prank

dp, greedy, trees

Cunning Gena

bitmasks, dp, greedy, sortings

Yet Another Substring Reverse

bitmasks, dp

You Are Given a WASD-string...

brute force, data structures, dp, greedy, implementation, math, strings

Super M

dfs and similar, dp, graphs, trees

Sum over all Substrings (Hard Version)

bitmasks, divide and conquer, dp, dsu, greedy, implementation, strings

Counting Binary Strings

combinatorics, dp, math

Counting Shortcuts

data structures, dfs and similar, dp, graphs, shortest paths

Wi-Fi

data structures, dp, greedy

Driving Test

data structures, dp, greedy

Red-Black Number

dfs and similar, dp, implementation, math, meet-in-the-middle

And Reachability

bitmasks, dp

Lunar New Year and Red Envelopes

data structures, dp

Connected Components

data structures, dfs and similar, dp, dsu

Berzerk

dfs and similar, dp, games

Work Group

dfs and similar, dp, graphs, strings, trees

Power Board

brute force, dp, math, number theory

Asterism (Hard Version)

binary search, combinatorics, dp, math, number theory, sortings

Cipher

combinatorics, dp

The World Is Just a Programming Task (Easy Version)

brute force, dp, greedy, implementation

Jeff and Furik

combinatorics, dp, probabilities

Logo Turtle

dp

Candy Party (Hard Version)

bitmasks, constructive algorithms, dp, greedy, implementation, math

Hot Start Up (hard version)

data structures, dp

Minimal Coverage

dp

Find a Number

dp, graphs, number theory, shortest paths

Running Track

dp, greedy, strings, trees

Bananas in a Microwave

dfs and similar, dp, graphs, implementation

New Year and Arbitrary Arrangement

dp, math, probabilities

Leha and another game about graph

constructive algorithms, data structures, dfs and similar, dp, graphs

Rearrange Brackets

brute force, dp, greedy, sortings, strings

Multicolored Marbles

dp, math

Staircases

brute force, combinatorics, data structures, dfs and similar, dp, implementation, math

Not Escaping

data structures, dp, implementation, shortest paths, two pointers

Product Sum

data structures, dp, geometry

Symmetric and Transitive

combinatorics, dp, math

Count Seconds

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

Mocha and Stars

combinatorics, dp, fft, math, number theory

Another MEX Problem

bitmasks, brute force, dp, shortest paths

Division + LCP (easy version)

binary search, data structures, dp, hashing, string suffix structures, strings

Rain and Umbrellas

dp

File List

dp, greedy, implementation

Turtle Mission: Robot and the Earthquake

dfs and similar, dp, graphs, shortest paths

Make It One

bitmasks, combinatorics, dp, math, number theory, shortest paths

Divan and Kostomuksha (hard version)

dp, number theory

Ball Sorting

data structures, dp, sortings

Skills

binary search, brute force, dp, greedy, sortings, two pointers

Pawn

dp

Correcting Mistakes

constructive algorithms, dp, greedy, hashing, strings, two pointers

Fruit Sequences

binary search, data structures, divide and conquer, dp, two pointers

Treasure Hunting

binary search, dp, greedy, implementation

Vasya and Binary String

dp

Ralph and Mushrooms

dp, graphs

An overnight dance in discotheque

dfs and similar, dp, geometry, greedy, trees

Bear and Tower of Cubes

binary search, dp, greedy

Random Task

binary search, bitmasks, combinatorics, dp, math

Bits And Pieces

bitmasks, dfs and similar, dp, greedy

Towers

dp, greedy, two pointers

Roma and Poker

dp, graphs