Lisa's Sequences

dp

Again Counting Arrays (Hard Version)

combinatorics, dp, math

Farmer John's Favorite Intern

data structures, dp, flows, trees

Crossing the Railways

data structures, dp

Fly Around the World

dp, geometry

Doremy's Average Tree

data structures, dp, greedy, trees

Redundant Routes

constructive algorithms, dp, trees

Three Minimums

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

Spiderweb Trees

dp, geometry, trees

Goldberg Machine 3

dp, trees

BinaryStringForces

constructive algorithms, data structures, dp

Min-Sum-Max

constructive algorithms, dp, greedy

Jellyfish and Inscryption

dp

AquaMoon and Time Stop (easy version)

data structures, dp

Anti-median (Hard Version)

combinatorics, dp, math

Minimum Hamming Distance

dp

AquaMoon and Time Stop (hard version)

data structures, dp

Slime and Hats

constructive algorithms, dp, greedy

Tokitsukaze and Gems

dp, math

Cyclic Hamming (Hard Version)

brute force, dp, fft, math, number theory

Olympiad Training

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

Assigning Fares

dp, trees

Panda Meetups

data structures, dp, flows

Arranging Crystal Balls

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

AquaMoon and Potatoes

brute force, data structures, dp

Slime and Sequences (Hard Version)

dp, fft, math

Tenzing and Necklace

divide and conquer, dp, greedy

Mark and Spaceship

brute force, dp

Balanced Distribution

data structures, dp, greedy

Willy-nilly, Crack, Into Release!

data structures, dp

Anti-Proxy Attendance

constructive algorithms, dp, interactive, ternary search

Finding the Vertex

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

Optimizations From Chelsu

divide and conquer, dp, number theory, trees

Lost Nodes

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

Bugaboo

bitmasks, constructive algorithms, dp, number theory

Maximum Product?

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

Mateusz and Escape Room

dp

Jellyfish and OEIS

dp

Cacti Symphony

combinatorics, dfs and similar, dp, graphs

School Clubs

dp, fft, math, number theory, probabilities

Old Mobile

combinatorics, dp, probabilities

Communism

bitmasks, dp, trees

Hopping Around the Array

data structures, dp

Just Add an Edge

dfs and similar, dp, graphs

XOR-ranges

dp, greedy

Modest Substrings

dp, strings

Nora's Toy Boxes

bitmasks, combinatorics, dp

Cupboards Jumps

dp

Making Shapes

dp

Density of subarrays

dp, math

Kuroni and Antihype

bitmasks, brute force, dp, dsu, graphs

Zero-XOR Array

*special problem, dp

Cyclic Hamming (Easy Version)

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

Mateusz and an Infinite Sequence

bitmasks, brute force, dp, strings

Red-Blue Graph

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

Multiple of Three Cycles

combinatorics, data structures, dp, dsu, math

Fake bullions

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

Turing's Award

data structures, dp

Passports

dp, implementation

Mini Metro

dp

Test Data Generation

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

Stairs

combinatorics, divide and conquer, dp, fft, math

Days of Floral Colours

combinatorics, divide and conquer, dp, fft, math

Caramel Clouds

data structures, dp, sortings

Happy Cactus

dp

Ember and Storm's Tree Game

combinatorics, dp, games, trees

Replace All

combinatorics, dp, math

Niyaz and Small Degrees

data structures, dp, trees

Grove

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

Hex Dyslexia

bitmasks, brute force, dp, graphs

Code Lock

bitmasks, dp

Harry Vs Voldemort

dfs and similar, dp, graphs, trees

Codeforces Scoreboard

binary search, data structures, dp, geometry

Combining Slimes

dp, math, matrices, probabilities

Doping

combinatorics, dp, math

Ball-Stackable

constructive algorithms, data structures, dp, trees

Finding satisfactory solutions

combinatorics, dp, graphs, greedy, math

Squares

constructive algorithms, data structures, dp, graphs, trees

Breadboard Capacity (easy version)

dp, flows, greedy

Sonya Partymaker

binary search, dp

Favorite Game

bitmasks, dp

Reverses

dp, string suffix structures, strings

Numbers on the blackboard

combinatorics, dp

A New Beginning

data structures, dp, geometry, sortings

Transforming Sequence

combinatorics, dp, fft, math

Number of Binominal Coefficients

dp, math, number theory

String Journey

data structures, dp, string suffix structures

Chess Rush

*special problem, combinatorics, dp, implementation, math

Uniform Chemistry

dp, math

Math, math everywhere

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

Hard Optimization

dp

An easy problem about trees

dp, games, greedy, trees

Xor-quiz

constructive algorithms, dp, interactive, math, number theory

Byteland coins

combinatorics, dp, math

Minimal Subset Difference

dp

Bitwise Magic

dp, math

Game of AI (easy version)

combinatorics, constructive algorithms, dp, fft, math

A Preponderant Reunion

constructive algorithms, dp

Thanos Snap

binary search, dp, games, greedy, trees

The Third Grace

data structures, dp