Yet Another DAG Problem

bitmasks, dfs and similar, dp, flows, graphs, math

Magic Breeding

bitmasks

Tree Weights

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

Magical Permutation

bitmasks, brute force, constructive algorithms, data structures, graphs, math

Chiori and Doll Picking (easy version)

bitmasks, brute force, combinatorics, math

Removal Sequences

bitmasks, dfs and similar, graphs

XOR Partition

binary search, bitmasks, data structures, divide and conquer, greedy, trees

Power or XOR?

bitmasks, combinatorics, math, number theory

Access Levels

bitmasks, dsu, flows, graph matchings

Nuclear Fusion

bitmasks, dp

XOR and Distance

bitmasks, divide and conquer, trees

Valera and Number

bitmasks, dp, math, probabilities

Quick Tortoise

bitmasks, divide and conquer, dp

Make It Ascending

bitmasks, brute force, dp

The Minimum Number of Variables

bitmasks, dp

Reality Show

bitmasks, dp

Chips on a Board

bitmasks, brute force, data structures, dp, games, two pointers

Sonya and Bitwise OR

bitmasks, data structures, divide and conquer

Maximum And Queries (hard version)

bitmasks, divide and conquer, dp, greedy

Sweets Game

bitmasks, dfs and similar, dp, games, implementation

Yash And Trees

bitmasks, data structures, dfs and similar, math, number theory

New Year and Entity Enumeration

bitmasks, combinatorics, dp, math

Bubble Cup hypothesis

bitmasks, constructive algorithms, dp, math

Logical Expression

bitmasks, dp, shortest paths

2048

bitmasks, dp

Friends

binary search, bitmasks, data structures, math

Bingo

bitmasks, combinatorics, dp, math, probabilities

Matrix Sorting

bitmasks, brute force, constructive algorithms, greedy, two pointers

Zeros and Ones

bitmasks, divide and conquer, dp, math

Anti-Theft Road Planning

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

Allowed Letters

bitmasks, flows, graph matchings, graphs, greedy

Running Competition

bitmasks, fft, math, number theory

Playoff Restoration

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

Mystery Circuit

bitmasks, brute force

XOR, Tree, and Queries

bitmasks, constructive algorithms, dfs and similar, dsu, graphs, greedy, implementation, trees

Keep XOR Low

bitmasks, combinatorics, data structures, divide and conquer, dp, math

Traveling Graph

bitmasks, graph matchings, graphs

Bear and Floodlight

bitmasks, dp, geometry

Wise Men (Easy Version)

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

Comfortably Numb

bitmasks, data structures, divide and conquer, strings, trees

The Tree Has Fallen!

bitmasks, dfs and similar, math, trees

Hot is Cold

bitmasks, data structures, divide and conquer, implementation

Algebra Flash

bitmasks, brute force, dp, graphs, math, meet-in-the-middle, trees

Strange LCS

bitmasks, dp, graphs, greedy, strings

Christmas Game

bitmasks, data structures, dfs and similar, dp, games, math, trees

The Boss's Identity

binary search, bitmasks, data structures, dfs and similar, greedy, math, sortings

Subsequences Galore

bitmasks, combinatorics, dp

Shortest Path Queries

bitmasks, data structures, dsu, graphs

Enormous XOR

bitmasks, constructive algorithms, greedy, math, strings, two pointers

Game with Strings

bitmasks, dp, probabilities

Turtle Magic: Royal Turtle Shell Pattern

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

Huge Strings

bitmasks, brute force, dp, implementation, strings

Sum the Fibonacci

bitmasks, divide and conquer, dp, fft, math

Construct Tree

bitmasks, constructive algorithms, dp, trees

Guess the Tree

bitmasks, constructive algorithms, dp, greedy, trees

Mercenaries

bitmasks, brute force, combinatorics, dp, dsu, math, two pointers

Dead Ends

bitmasks, dp

Snake

bitmasks, dfs and similar, graphs, implementation

Secure Password

bitmasks, combinatorics, constructive algorithms, interactive, math

Jee, You See?

bitmasks, combinatorics, dp

Inna and Binary Logic

binary search, bitmasks, data structures

Bags and Coins

bitmasks, constructive algorithms, dp, greedy

Pave the Parallelepiped

bitmasks, brute force, combinatorics, math, number theory

Twin Clusters

bitmasks, brute force, constructive algorithms, math, probabilities

Field Photography

bitmasks, data structures, sortings

Kuroni and Antihype

bitmasks, brute force, dp, dsu, graphs

Password

bitmasks, dp, shortest paths

Maximum Matching

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

Odd Mineral Resource

binary search, bitmasks, brute force, data structures, probabilities, trees

Foo Fighters

bitmasks, constructive algorithms

Hossam and Range Minimum Query

binary search, bitmasks, data structures, hashing, probabilities, strings, trees

Xor-matic Number of the Graph

bitmasks, graphs, math, number theory, trees

Hongcow Buys a Deck of Cards

bitmasks, brute force, dp

Axel and Marston in Bitland

bitmasks, dp, graphs, matrices

Swap and Maximum Block

bitmasks, data structures, dfs and similar, divide and conquer, dp

Divide, XOR, and Conquer

bitmasks, dp, math

The Most Reckless Defense

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

XOR Counting

bitmasks, combinatorics, dp, math

Two Arrays

bitmasks, brute force, combinatorics, greedy, hashing, math, two pointers

Minimal String Xoration

bitmasks, data structures, divide and conquer, greedy, hashing, sortings, strings

Jellyfish and Math

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

Summer Earnings

binary search, bitmasks, brute force, geometry, sortings

wxhtzdy ORO Tree

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

Typical Party in Dorm

bitmasks, combinatorics, dp, strings

Captains Mode

bitmasks, dp, games

X-OR

bitmasks, constructive algorithms, divide and conquer, interactive, probabilities

ANDfinity

bitmasks, brute force, constructive algorithms, dfs and similar, dsu, graphs

Happy New Year

bitmasks, dp, implementation

Cleaning Robot

bitmasks, dp

Distance Learning Courses in MAC

bitmasks, brute force, data structures, greedy, math

Sports Betting

bitmasks, combinatorics, dp, graphs, math, probabilities

Party

bitmasks, brute force, dp, graphs

XOR Break --- Game Version

bitmasks, games, greedy, interactive

Alex and a TV Show

bitmasks, combinatorics, number theory

Xorcerer's Stones

bitmasks, constructive algorithms, dp, trees

Defender of Childhood Dreams

bitmasks, constructive algorithms, divide and conquer

Continuous City

bitmasks, constructive algorithms

Multiple Lamps

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

Xum

bitmasks, constructive algorithms, math, matrices, number theory

Petya and Spiders

bitmasks, dp, dsu