Divide OR Conquer

bitmasks, data structures, dp, implementation

Natlan Exploring

bitmasks, combinatorics, data structures, dp, math, number theory

XORificator 3000

bitmasks, dp, number theory, two pointers

Alya and Permutation

bitmasks, constructive algorithms, math

Message Spread

bitmasks, brute force, combinatorics, dp

Alice's Adventures in Addition

bitmasks, brute force, dp, implementation

Bit Game (Hard Version)

bitmasks, dp, math

Bit Game (Easy Version)

bitmasks, brute force, games, math

Best Subsequence

bitmasks, dfs and similar, flows, graph matchings, graphs

Expected Power

bitmasks, dp, math, probabilities

Bitwise Balancing

bitmasks, hashing, implementation, math, schedules, ternary search

Find Minimum Operations

bitmasks, brute force, greedy, math, number theory

Firefly's Queries

bitmasks, data structures, flows, math

Lattice Optimizing

bitmasks, brute force, hashing, meet-in-the-middle

Cases

bitmasks, brute force, dp, strings

Minecraft

bitmasks, brute force, dp, graphs, math

Wooden Game

bitmasks, greedy, math, trees

Fun Game

bitmasks, constructive algorithms, greedy, math

Xor-Grid Problem

bitmasks, constructive algorithms, dp, implementation

Prime Split Game

bitmasks, dp, fft, games, math, number theory

Prime XOR Coloring

bitmasks, constructive algorithms, graphs, greedy, math, number theory

AND Reconstruction

bitmasks, constructive algorithms, greedy

Grid Puzzle

bitmasks, brute force, dp, greedy, implementation

Increasing Sequence with Fixed OR

bitmasks, constructive algorithms, greedy

Your Loss

bitmasks, brute force, dp, trees

array-value

binary search, bitmasks, data structures, greedy, two pointers

Number of k-good subarrays

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

Turtle and an Incomplete Sequence

bitmasks, brute force, constructive algorithms, greedy, implementation, math

Turtle and an Infinite Sequence

bitmasks, math

Yasya and the Mysterious Tree

bitmasks, data structures, dfs and similar, graphs, greedy, strings, trees

Fixing a Binary String

bitmasks, brute force, constructive algorithms, dp, greedy, hashing, strings

XOR Sequences

bitmasks, greedy

XORificator

bitmasks, brute force, greedy, hashing

Binary Colouring

bitmasks, constructive algorithms, greedy, math

Set

bitmasks, brute force, combinatorics, dfs and similar, divide and conquer, dp, math

Maximum GCD Sum Queries

bitmasks, brute force, dp, implementation, number theory

Cat, Fox and the Lonely Array

binary search, bitmasks, data structures, greedy, math, two pointers

Min-Fund Prison (Hard)

bitmasks, dfs and similar, dp, graphs, trees

Fenwick Tree

bitmasks, brute force, combinatorics, data structures, dp, math, trees

Missing Subsequence Sum

bitmasks, constructive algorithms, greedy, number theory

A BIT of an Inequality

bitmasks, brute force, dp, math

A BIT of a Construction

bitmasks, constructive algorithms, greedy, implementation

Nene and the Mex Operator

bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math

The Most Reckless Defense

bitmasks, brute force, constructive algorithms, dp, flows, graph matchings, shortest paths

Dark Matter

bitmasks, geometry

Shuffling Songs

bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings

0, 1, 2, Tree!

bitmasks, brute force, greedy, implementation, trees

MST with Matching

bitmasks, brute force, dsu, graph matchings, trees

Birthday Gift

bitmasks, brute force, constructive algorithms, greedy, implementation

Equal XOR

bitmasks, constructive algorithms

Bitwise Paradox

binary search, bitmasks, data structures, greedy, two pointers

Bitwise Operation Wizard

bitmasks, constructive algorithms, greedy, interactive, math

Distance Learning Courses in MAC

bitmasks, brute force, data structures, greedy, math

XOR Break --- Game Version

bitmasks, games, greedy, interactive

XOR Break --- Solo Version

bitmasks, constructive algorithms, greedy

Turtle Magic: Royal Turtle Shell Pattern

bitmasks, brute force, combinatorics, constructive algorithms, dfs and similar, math

Maximize the Difference

bitmasks, brute force, dfs and similar

Sum over all Substrings (Hard Version)

bitmasks, divide and conquer, dp, dsu, greedy, implementation, strings

Sasha and the Happy Tree Cutting

bitmasks, brute force, dfs and similar, dp, graphs, greedy, math, trees

Vlad and Avoiding X

bitmasks, brute force, dfs and similar, dp, implementation

Vlad and an Odd Ordering

binary search, bitmasks, data structures, dp, implementation, math, number theory

Vlad and Division

bitmasks, greedy

Increasing Subsequences

bitmasks, constructive algorithms, divide and conquer, greedy, math

XOR-distance

bitmasks, greedy, implementation, math

Construct Tree

bitmasks, constructive algorithms, dp, trees

Not Quite Latin Square

bitmasks, brute force, implementation

Odd One Out

bitmasks, implementation

Game with Multiset

binary search, bitmasks, brute force, greedy

Kim's Quest

bitmasks, combinatorics, dp

Multiple Lamps

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

Make Almost Equal With Mod

bitmasks, constructive algorithms, math, number theory

Button Pressing

bitmasks, constructive algorithms, hashing

Maximum And Queries (hard version)

bitmasks, divide and conquer, dp, greedy

Maximum And Queries (easy version)

binary search, bitmasks, brute force, greedy

StORage room

bitmasks, brute force, constructive algorithms, greedy

Small GCD

bitmasks, brute force, dp, math, number theory

XOR Construction

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

I Wanna be the Team Leader

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

Look Back

bitmasks, greedy

Tree XOR

bitmasks, dfs and similar, dp, greedy, trees

Sets and Union

bitmasks, brute force, constructive algorithms, greedy

Sum of XOR Functions

bitmasks, combinatorics, divide and conquer, dp, math

wxhtzdy ORO Tree

binary search, bitmasks, brute force, data structures, dfs and similar, implementation, trees

Iva & Pav

binary search, bitmasks, data structures, greedy

Jellyfish and Green Apple

bitmasks, greedy, math, number theory

Jellyfish and Math

bitmasks, brute force, dfs and similar, dp, graphs, shortest paths

Data Structures Fan

binary search, bitmasks, data structures, dp

Another MEX Problem

bitmasks, brute force, dp, shortest paths

Friendly Arrays

bitmasks, greedy, math

Candy Party (Hard Version)

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

Candy Party (Easy Version)

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

XOR Palindromes

bitmasks, constructive algorithms, strings

Guess Game

bitmasks, data structures, games, math, probabilities, sortings, strings, trees

Divisor Chain

bitmasks, constructive algorithms, math, number theory

Divide, XOR, and Conquer

bitmasks, dp, math

Magic Will Save the World

binary search, bitmasks, brute force, dp

Four Suits

binary search, bitmasks, flows, greedy

PermuTree (hard version)

bitmasks, dfs and similar, dp, fft, greedy, implementation, math, trees

Earn or Unlock

bitmasks, brute force, dp

Lisa and the Martians

bitmasks, greedy, math, strings, trees