Bowser's Castle (Hard Version)

constructive algorithms, divide and conquer, interactive, trees, two pointers

Bowser's Castle (Medium Version)

constructive algorithms, divide and conquer, interactive, trees, two pointers

Bowser's Castle (Easy Version)

binary search, constructive algorithms, divide and conquer, greedy, interactive, trees

Toothless

constructive algorithms, dfs and similar, dsu

Hanabi

binary search, data structures, dp, dsu, flows, graph matchings, graphs, greedy

N-MEX (Counting Version)

combinatorics, constructive algorithms, math

N-MEX (Constructive Version)

constructive algorithms, greedy

Boxed Like a Fish

dfs and similar, dp, games, shortest paths, trees

Where's My Water?

data structures, divide and conquer, dp, math

One Night At Freddy's

games, greedy, sortings

1-1

greedy, strings

Deformed Balance

Onion

Time Display Stickers

binary search

Worldwide Playlist

math

Growth Factor

combinatorics, dp, math, number theory

Reflect Sort

number theory

Extra Transition

graphs

Minesweeper String

fft, number theory

Parallel Sums

data structures, geometry

Christmas Tree Un-decoration

data structures, dp, trees

Upside Down Dijkstra

dfs and similar

Subtree Removal Game

binary search, games, trees

Compare Suffixes

interactive

Simons and Diophantus Equation

bitmasks, brute force, data structures, math, number theory

Simons and Reconstructing His Roads

constructive algorithms, constructive algorithms, constructive algorithms, constructive algorithms, data structures, data structures, dsu, graphs

Simons and Dividing the Rhythm

combinatorics, data structures, dp, dsu, math, string suffix structures, strings, strings, strings

Simons and Beating Peaks

data structures, data structures, divide and conquer, dp, dp, greedy, implementation, trees

Simons and Posting Blogs

greedy, greedy, greedy, sortings

Simons and Cakes for Success

implementation, math, math

Simons and Making It Beautiful

brute force, constructive algorithms, constructive algorithms, constructive algorithms, constructive algorithms, constructive algorithms, constructive algorithms

Grid Path

dp, dp, graphs, matrices

Sum of Fractions

binary search, brute force, combinatorics, data structures, greedy, math, number theory, two pointers

Sum of Digits (and Again)

brute force, constructive algorithms, math

Alternating Path

constructive algorithms, dfs and similar, graph matchings, graphs, graphs, graphs, graphs

Spring

math, math, math, math, math, number theory

Right Maximum

greedy

Passing the Ball

brute force, implementation

Binary Search with One Swap

binary search, divide and conquer, dp, hashing, math, two pointers

Probabilistic Card Game

binary search, data structures, games, greedy, math, ternary search

Divisibility Game

brute force, games, games, games, greedy, number theory, number theory

Test Generator

binary search, bitmasks, greedy, math

Beautiful Numbers

bitmasks, dp, fft, greedy, math

Towers of Boxes

math

Monotone Monochrome Matrices (Easy Version)

data structures, data structures, data structures, data structures

ABAB Construction

dp, greedy, greedy, greedy, implementation

Parkour Design

math, math, math, math

Codeforces Heuristic Contest 1001

constructive algorithms

Monotone Monochrome Matrices (Hard Version)

constructive algorithms, data structures, hashing, math

Monotone Monochrome Matrices (Medium Version)

data structures, hashing

ABBA Counting

fft, fft, math, number theory, strings

Binary Not Search and Queries

data structures, greedy, implementation

Rigged Bracket Sequence

combinatorics, dp, greedy

Recollect Numbers

constructive algorithms

Lost Civilization (Hard Version)

data structures, dp

Lost Civilization (Easy Version)

data structures, data structures

Six Seven

divide and conquer, math, number theory, strings, strings, trees

Operation Permutation

combinatorics, dp, math, probabilities

Mooclear Reactor 2

brute force, data structures, greedy, implementation, sortings

Divisive Battle

games, greedy, math, number theory

Portal

greedy, sortings

Specialty String

brute force, greedy, strings

Deletion Sort

bitmasks, brute force, greedy, sortings

Eating Game

greedy

Strange Process

*special problem

Sum of MEX

*special problem, combinatorics, data structures, dp, math

Jammer

*special problem, math

Self-Produced Sequences

*special problem, combinatorics, math

Supersequence

*special problem, binary search, greedy

Two Arrays

*special problem, math

Minesweeper

*special problem, constructive algorithms, greedy

Two Towers

*special problem, greedy, math

Game

*special problem

Array and Permutation

implementation, schedules, sortings, two pointers

Friendly Numbers

binary search, brute force, expression parsing, math, schedules

Indivisible

brute force, constructive algorithms, graphs

Fuzzy Concatenation (Hard version)

binary search, bitmasks, data structures, dp, greedy, string suffix structures

Fuzzy Concatenation (Easy Version)

binary search, bitmasks, brute force, data structures, greedy, string suffix structures

Double Bracket Sequence

data structures, dp, expression parsing, flows, greedy, strings

Interactive Graph (Hard Version)

combinatorics, dfs and similar, dp, graphs, interactive

Interactive Graph (Simple Version)

binary search, combinatorics, dfs and similar, dp, graphs, interactive

Another Problem about Beautiful Pairs

brute force, math, two pointers

Game with a Fraction

games, math

Codeforces Heuristic Contest 001

brute force, constructive algorithms, geometry, implementation

Idiot First Search and Queries

binary search, data structures, dp, graphs, trees

Parabola Independence

dp, graphs, greedy, math, sortings

Idiot First Search

dfs and similar, dp, trees

Absolute Cinema

math

Dice Roll Sequence

dp, greedy

Heapify 1

implementation, sortings

Sieve of Erato67henes

math, number theory

Again Trees... (hard version)

bitmasks, data structures, dfs and similar, dp, fft, trees

Again Trees... (Easy Version)

bitmasks, dfs and similar, dp, trees

The Turtle Strikes Back

dp, graphs, greedy, implementation

Table Cut

constructive algorithms, greedy, implementation

Secret message

bitmasks, brute force, dp, math, number theory

Offshores

greedy, implementation, math

Lawn Mower

greedy, math

Remove the Grail Tree

dfs and similar, dp, graphs, greedy, implementation, trees

Paths in a Tree

dfs and similar, interactive, sortings, trees