Make Almost Equal With Mod

bitmasks, constructive algorithms, math, number theory

Lights

brute force, constructive algorithms, dfs and similar, graphs, greedy, implementation

Jumping Through Segments

binary search, constructive algorithms

Removal of Unattractive Pairs

constructive algorithms, greedy, math, strings

Palindromic Parentheses

constructive algorithms

Merge Not Sort

constructive algorithms, dp

Button Pressing

bitmasks, constructive algorithms, hashing

Constructive Problems

constructive algorithms, math

Set To Max (Hard Version)

constructive algorithms, data structures, divide and conquer, greedy, implementation, sortings

Set To Max (Easy Version)

brute force, constructive algorithms, greedy

Theofanis' Nightmare

constructive algorithms, greedy

StORage room

bitmasks, brute force, constructive algorithms, greedy

Insert and Equalize

brute force, constructive algorithms, greedy, math, number theory

Binary Imbalance

constructive algorithms

Add, Divide and Floor

constructive algorithms, greedy, math

Cover in Water

constructive algorithms, greedy, implementation, strings

Alex's whims

constructive algorithms, graphs, greedy, shortest paths, trees

Colorful Grid

constructive algorithms

Pepe Racing

constructive algorithms, implementation, interactive, sortings

Bracket Xoring

constructive algorithms, greedy, implementation, math

Matching Arrays

binary search, constructive algorithms, greedy, sortings

XOR Construction

bitmasks, constructive algorithms, data structures, math, string suffix structures, trees

Two Out of Three

constructive algorithms

Colorful Constructive

constructive algorithms, data structures, greedy

Neutral Tonality

constructive algorithms, greedy, sortings, two pointers

Smilo and Monsters

binary search, constructive algorithms, greedy, sortings, two pointers

Sorting with Twos

constructive algorithms, sortings

Qingshan Loves Strings

constructive algorithms, implementation

Doremy's Paint 3

constructive algorithms

Doremy's Connecting Plan

constructive algorithms, greedy, math, sortings

Qingshan Loves Strings 2

constructive algorithms, greedy, implementation

Minimum Segments

constructive algorithms

Good Colorings

binary search, constructive algorithms, graphs, interactive

Minimum Array

binary search, brute force, constructive algorithms, data structures, greedy, hashing, two pointers

I Wanna be the Team Leader

bitmasks, constructive algorithms, dp, greedy, math, sortings, two pointers

Sum of Three

brute force, constructive algorithms, math

Two Permutations (Hard Version)

constructive algorithms

Two Permutations (Easy Version)

brute force, constructive algorithms, greedy, number theory

Sets and Union

bitmasks, brute force, constructive algorithms, greedy

Interactive Game with Coloring

brute force, constructive algorithms, dfs and similar, graphs, implementation, interactive, trees

Chips on the Board

constructive algorithms, greedy

Aleksa and Stack

constructive algorithms, math

Ball-Stackable

constructive algorithms, data structures, dp, trees

Autosynthesis

constructive algorithms, dfs and similar, graphs, greedy, sortings

ABBC or BACB

constructive algorithms, greedy

MEXanized Array

constructive algorithms, greedy, math

Make It Zero

constructive algorithms

Min-Sum-Max

constructive algorithms, dp, greedy

Flower-like Pseudotree

constructive algorithms, graphs, greedy, implementation, trees

Candy Party (Hard Version)

bitmasks, constructive algorithms, dp, greedy, implementation, math

Candy Party (Easy Version)

bitmasks, constructive algorithms, graphs, greedy, implementation, math

Fill in the Matrix

constructive algorithms, implementation

Most Different Tree

brute force, constructive algorithms, dfs and similar, greedy, hashing

Salyg1n and Array (hard version)

constructive algorithms, interactive

Salyg1n and Array (simple version)

constructive algorithms, interactive, math

Cyclic Operations

brute force, constructive algorithms, dfs and similar, graphs, greedy, implementation

Salyg1n and the MEX Game

constructive algorithms, data structures, games, greedy, interactive

XOR Palindromes

bitmasks, constructive algorithms, strings

green_gold_dog, array and permutation

constructive algorithms, sortings

Magic Square

combinatorics, constructive algorithms, implementation

Matrix Cascade

brute force, constructive algorithms, data structures, dp, greedy, math

Divisor Chain

bitmasks, constructive algorithms, math, number theory

Swap and Reverse

constructive algorithms, greedy, sortings, strings

Increasing and Decreasing

constructive algorithms, greedy, implementation, math

Redundant Routes

constructive algorithms, dp, trees

Two-Colored Dominoes

constructive algorithms, greedy

Kolya and Movie Theatre

constructive algorithms, data structures, greedy

Ice Cream Balls

binary search, combinatorics, constructive algorithms, math

Sequence Game

constructive algorithms

Two Binary Strings

constructive algorithms, dp, greedy

Prime Deletion

constructive algorithms, math

Not a Substring

constructive algorithms, strings

Olya and Game with Arrays

constructive algorithms, greedy, math, sortings

United We Stand

constructive algorithms, math, number theory

Yet Another Permutation Problem

constructive algorithms, greedy, math, number theory

Game Bundles

brute force, constructive algorithms, dp, greedy, math

Dual (Hard Version)

constructive algorithms, math

Dual (Easy Version)

constructive algorithms, math

Rivalries

constructive algorithms, data structures, greedy

Miriany and Matchstick

constructive algorithms, dp, greedy

Imbalanced Arrays

constructive algorithms, graphs, greedy, math, sortings, two pointers

Escalator Conversations

brute force, constructive algorithms, math

Array Painting

constructive algorithms, greedy, two pointers

Rudolph and Mimic

constructive algorithms, implementation, interactive

Rudolph and Christmas Tree

constructive algorithms, geometry, math

Rudolf and the Another Competition

constructive algorithms, data structures, dp, greedy, sortings

Forbidden Integer

constructive algorithms, implementation, math, number theory

Tree Weights

bitmasks, constructive algorithms, data structures, dfs and similar, implementation, math, matrices, number theory, trees

Min Cost Permutation (Hard Version)

binary search, constructive algorithms, data structures, greedy, math, sortings

Min Cost Permutation (Easy Version)

brute force, constructive algorithms, greedy, math

Great Grids

2-sat, constructive algorithms, dfs and similar, dsu, graphs

Row Major

constructive algorithms, greedy, math, number theory, strings

Permutations & Primes

constructive algorithms, math

Subtraction Game

constructive algorithms, games

Tenzing and His Animal Friends

constructive algorithms, graphs, greedy

Game with Board

constructive algorithms, games

In Search of Truth (Hard Version)

constructive algorithms, interactive, math, meet-in-the-middle, probabilities

In Search of Truth (Easy Version)

constructive algorithms, interactive, math, meet-in-the-middle, probabilities

Decreasing Game

constructive algorithms, dfs and similar, dp, greedy, interactive

Insert Zero and Invert Prefix

constructive algorithms