Shady Lady

geometry, math

Long number

expression parsing, math, number theory

Cyclic Hamming (Hard Version)

brute force, dp, fft, math, number theory

Tokitsukaze and Gems

dp, math

DravDe saves the world

geometry, math

Cyclic Cipher

fft, math

Flow Optimality

constructive algorithms, flows, math

Mainak and the Bleeding Polygon

binary search, geometry, implementation, math

Math, math everywhere

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

Damage per Second

brute force, math

Cyclic Hamming (Easy Version)

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

Koishi's Unconscious Permutation

fft, math

Anti-median (Hard Version)

combinatorics, dp, math

Cubic Lattice

geometry, math, matrices, number theory

Game of AI (hard version)

combinatorics, fft, math

Short Permutation Problem

combinatorics, dp, fft, math

Three Minimums

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

Dirty plates

constructive algorithms, math

Division Avoidance

greedy, math

Bad Cryptography

math, number theory

Egg Roulette

bitmasks, brute force, divide and conquer, math, meet-in-the-middle

King's Path

*special problem, math, trees

M-numbers

*special problem, dp, math

Count Permutations

math

Uniform Chemistry

dp, math

Heroes of Might

math

Interval Coloring

*special problem, greedy, math

Intergalactic Sliding Puzzle

combinatorics, constructive algorithms, math

Innovative Washing Machine

geometry, math, two pointers

Chess Rush

*special problem, combinatorics, dp, implementation, math

Captain of Knights

math

Game of Chance

math, probabilities

Flower Shop

*special problem, data structures, fft, math