A Certain Magical Party

combinatorics, data structures, greedy, sortings

AmShZ Farm

combinatorics, fft, math

Finding satisfactory solutions

combinatorics, dp, graphs, greedy, math

Send Tree to Charlie

combinatorics, dfs and similar, dsu, trees

Doping

combinatorics, dp, math

Problem from Red Panda

combinatorics

Special Positions

combinatorics, divide and conquer, fft, math

Multithreading (Hard Version)

combinatorics, implementation, math

Problems for Codeforces

combinatorics, fft, math

Flowers and Chocolate

combinatorics, math, matrices

Complete the Permutations

combinatorics, fft, graphs, math

Replace All

combinatorics, dp, math

Ember and Storm's Tree Game

combinatorics, dp, games, trees

Days of Floral Colours

combinatorics, divide and conquer, dp, fft, math

Stairs

combinatorics, divide and conquer, dp, fft, math

Test Data Generation

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

Fake bullions

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

Multiple of Three Cycles

combinatorics, data structures, dp, dsu, math

Intergalactic Sliding Puzzle

combinatorics, constructive algorithms, math

Nora's Toy Boxes

bitmasks, combinatorics, dp

Chiori and Doll Picking (hard version)

bitmasks, brute force, combinatorics, math

Become Big For Me

combinatorics, constructive algorithms, greedy, math, number theory

Old Mobile

combinatorics, dp, probabilities

Cacti Symphony

combinatorics, dfs and similar, dp, graphs

Omkar and Mosaic

combinatorics, constructive algorithms, math

Maximum Product?

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

Nezzar and Chocolate Bars

combinatorics, fft, math, probabilities

Anti-median (Hard Version)

combinatorics, dp, math

Game of AI (hard version)

combinatorics, fft, math

Three Minimums

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

Counting Is Fun

combinatorics