Ball-Stackable

constructive algorithms, data structures, dp, trees

Combining Slimes

dp, math, matrices, probabilities

Counting Skyscrapers

dp, math, probabilities

Deja Vu

constructive algorithms, dp

World Evil

dp, flows

Landmarks

data structures, dp

Another Meme Problem

dp

Caramel Clouds

data structures, dp, sortings

Cubes

data structures, dp, geometry, two pointers

Palindromic Doubles

*special problem, data structures, dp

Old Mobile

combinatorics, dp, probabilities

Days of Floral Colours

combinatorics, divide and conquer, dp, fft, math

Harry Vs Voldemort

dfs and similar, dp, graphs, trees

Codeforces Scoreboard

binary search, data structures, dp, geometry

Anti-median (Easy Version)

dp, math

Sequence Transformation

brute force, data structures, dp, implementation, math

Stairs

combinatorics, divide and conquer, dp, fft, math

Star Trek

*special problem, combinatorics, dfs and similar, dp, games, graphs, matrices, trees

Cactus to Tree

dp, graphs, trees

Kojiro and Furrari

dp, greedy

Unique Strings

combinatorics, dp, math

Thanos Snap

binary search, dp, games, greedy, trees

A Preponderant Reunion

constructive algorithms, dp

Test Data Generation

combinatorics, divide and conquer, dp, fft, math, number theory

School Clubs

dp, fft, math, number theory, probabilities

Cacti Symphony

combinatorics, dfs and similar, dp, graphs

Kotlinforces

*special problem, constructive algorithms, dp

Jumping Transformers

dp

Game of AI (easy version)

combinatorics, constructive algorithms, dp, fft, math

Two Characters, Two Colors

binary search, data structures, dp, flows, greedy

Code Lock

bitmasks, dp

Poachers

dp, games, graphs, trees

Sloth

dfs and similar, dp, graph matchings, trees

Tree and Table

dfs and similar, dp, implementation, trees

Maximum Sum Subarrays

*special problem, dp

Bitwise Magic

dp, math

Conference Problem

dp

Hellish Constraints

brute force, dp, two pointers

Stock Trading

dp

Mrs. Hudson's Pancakes

brute force, dp

Mini Metro

dp

Minimal Subset Difference

dp

Mateusz and Escape Room

dp

Maximum Product?

brute force, combinatorics, dp, greedy, implementation, math, two pointers

Jellyfish and OEIS

dp

Passports

dp, implementation

Byteland coins

combinatorics, dp, math

Bugaboo

bitmasks, constructive algorithms, dp, number theory

Bob and stages

dp, geometry

Lost Nodes

constructive algorithms, dp, graphs, interactive, sortings, trees

Turing's Award

data structures, dp

New Year Cactus

dp

Number Deletion Game

*special problem, dp, games, greedy

Fake bullions

combinatorics, dfs and similar, dp, graphs, number theory

R3D3’s Summer Adventure

dp, greedy

Optimizations From Chelsu

divide and conquer, dp, number theory, trees

To Hack or not to Hack

brute force, dp, greedy

Multiple of Three Cycles

combinatorics, data structures, dp, dsu, math

Finding the Vertex

brute force, dfs and similar, dp, interactive, trees

Clever Fat Rat

dp

Willy-nilly, Crack, Into Release!

data structures, dp

Anti-Proxy Attendance

constructive algorithms, dp, interactive, ternary search

Viruses

*special problem, dp, shortest paths, string suffix structures

Colored Jenga

dfs and similar, dp, probabilities

Balanced Distribution

data structures, dp, greedy

Hex Dyslexia

bitmasks, brute force, dp, graphs

Xor-quiz

constructive algorithms, dp, interactive, math, number theory

Mark and Spaceship

brute force, dp

Vasily the Bear and Painting Square

bitmasks, combinatorics, dp, implementation

Tenzing and Necklace

divide and conquer, dp, greedy

Slime and Sequences (Hard Version)

dp, fft, math

BubbleReactor

dp, graphs

Arranging Crystal Balls

data structures, divide and conquer, divide and conquer, dp, geometry, graphs, number theory

AquaMoon and Potatoes

brute force, data structures, dp

An easy problem about trees

dp, games, greedy, trees

Composing Of String

*special problem, dp

Red-Blue Graph

dp, graphs, math, matrices, meet-in-the-middle

Panda Meetups

data structures, dp, flows

Hard Optimization

dp

Mateusz and an Infinite Sequence

bitmasks, brute force, dp, strings

Olympiad Training

binary search, data structures, dp, flows, geometry, implementation, sortings

Assigning Fares

dp, trees

Cyclic Hamming (Hard Version)

brute force, dp, fft, math, number theory

Tokitsukaze and Gems

dp, math

Slime and Hats

constructive algorithms, dp, greedy

Grove

brute force, dfs and similar, dp, geometry, probabilities

Submatrices

*special problem, bitmasks, data structures, dp

Math, math everywhere

brute force, dp, math, meet-in-the-middle, number theory

AquaMoon and Time Stop (hard version)

data structures, dp

Cyclic Hamming (Easy Version)

brute force, divide and conquer, dp, fft, math, number theory

Anti-median (Hard Version)

combinatorics, dp, math

AquaMoon and Time Stop (easy version)

data structures, dp

Short Permutation Problem

combinatorics, dp, fft, math

Min-Sum-Max

constructive algorithms, dp, greedy

Minimum Hamming Distance

dp

Jellyfish and Inscryption

dp

BinaryStringForces

constructive algorithms, data structures, dp

Goldberg Machine 3

dp, trees

A Battle Against a Dragon

*special problem, data structures, dp

Three Minimums

combinatorics, constructive algorithms, divide and conquer, dp, fft, math