Grove

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

Math, math everywhere

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

Minimum Hamming Distance

dp

Submatrices

*special problem, bitmasks, data structures, dp

Maximum GCD Sum Queries

bitmasks, brute force, dp, implementation, number theory

Short Permutation Problem

combinatorics, dp, fft, math

Cyclic Hamming (Easy Version)

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

AquaMoon and Time Stop (hard version)

data structures, dp

Anti-median (Hard Version)

combinatorics, dp, math

Jellyfish and Inscryption

dp

AquaMoon and Time Stop (easy version)

data structures, dp

Min-Sum-Max

constructive algorithms, dp, greedy

BinaryStringForces

constructive algorithms, data structures, dp

Goldberg Machine 3

dp, trees

A Battle Against a Dragon

*special problem, data structures, dp

Redundant Routes

constructive algorithms, dp, trees

Three Minimums

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

Spiderweb Trees

dp, geometry, trees

Doremy's Average Tree

data structures, dp, greedy, trees

M-numbers

*special problem, dp, math

Uniform Chemistry

dp, math

Fly Around the World

dp, geometry

Composite Spells

*special problem, dp

Farmer John's Favorite Intern

data structures, dp, flows, trees

Crossing the Railways

data structures, dp

Big Persimmon

*special problem, dp, games

Again Counting Arrays (Hard Version)

combinatorics, dp, math

Zero-XOR Array

*special problem, dp

Pac-Man 2.0

*special problem, dp

Inverse Problem

*special problem, combinatorics, dp

Chess Rush

*special problem, combinatorics, dp, implementation, math

Road Repair in Treeland

*special problem, binary search, dp, trees

Paint the String

*special problem, dp, strings

Good Subsets

*special problem, dp

Lisa's Sequences

dp

Draw Polygon Lines

*special problem, constructive algorithms, dp, geometry, interactive