Bored Bakry

bitmasks, greedy, math, two pointers

Bakry and Partitioning

bitmasks, constructive algorithms, dfs and similar, dp, graphs, trees

Strange LCS

bitmasks, dp, graphs, greedy, strings

Defender of Childhood Dreams

bitmasks, constructive algorithms, divide and conquer

Korney Korneevich and XOR (easy version)

bitmasks, dp, greedy

Fix the String

*special problem, bitmasks, dp, greedy

Playoff Restoration

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

Carrying Conundrum

bitmasks, combinatorics, dp, math

MEXor Mixup

bitmasks, greedy

MAX-MEX Cut

bitmasks, constructive algorithms, dp, greedy

MIN-MEX Cut

bitmasks, constructive algorithms, dp, greedy

Nearest Beautiful Number (hard version)

bitmasks, brute force, constructive algorithms, dfs and similar, dp, greedy

Nearest Beautiful Number (easy version)

binary search, bitmasks, brute force, constructive algorithms, dfs and similar, greedy

Mocha and Math

bitmasks, constructive algorithms, math

Moamen and XOR

bitmasks, combinatorics, dp, math, matrices

Gates to Another World

bitmasks, data structures, dsu, two pointers

Sports Betting

bitmasks, combinatorics, dp, graphs, math, probabilities

Take a Guess

bitmasks, constructive algorithms, interactive, math

Mikasa

binary search, bitmasks, greedy, implementation

Cobb

bitmasks, brute force, greedy, math

XOR and Distance

bitmasks, divide and conquer, trees

Penalty

bitmasks, brute force, dp, greedy

A Serious Referee

bitmasks, brute force, dfs and similar, sortings

Array Differentiation

bitmasks, brute force, constructive algorithms, dfs and similar, dp, graphs, math

Stringforces

binary search, bitmasks, brute force, dp, strings, two pointers

Gregor and the Odd Cows (Easy)

bitmasks, geometry, math, number theory

Co-growing Sequence

bitmasks, constructive algorithms, greedy

The Final Pursuit

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

RPD and Rap Sheet (Easy Version)

bitmasks, constructive algorithms, interactive, math

Need for Pink Slips

bitmasks, brute force, dfs and similar, implementation, math, probabilities

Submatrices

*special problem, bitmasks, data structures, dp

Bingo

bitmasks, combinatorics, dp, math, probabilities

And Then There Were K

bitmasks

Favorite Game

bitmasks, dp

Love-Hate

bitmasks, brute force, dp, probabilities

Chests and Keys

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

Baby Ehab Partitions Again

bitmasks, constructive algorithms, dp, math

AGAGA XOOORRR

bitmasks, brute force, dp, greedy

Phoenix and Bits

bitmasks, brute force, data structures, sortings

AND 0, Sum Big

bitmasks, combinatorics, math

AND Sequences

bitmasks, combinatorics, constructive algorithms, math

Chips on a Board

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

Complete the MST

bitmasks, brute force, data structures, dfs and similar, dsu, graphs, greedy, trees

Matrix Sorting

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

Christmas Game

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

Box Fitting

binary search, bitmasks, data structures, greedy

Genius

bitmasks, dp, graphs, number theory

Berland Crossword

bitmasks, brute force, greedy, implementation

ABC String

bitmasks, brute force, implementation

Enchanted Matrix

bitmasks, interactive, number theory

Enormous XOR

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

Genius's Gambit

bitmasks, constructive algorithms, greedy, math

Zookeeper and The Infinite Zoo

bitmasks, constructive algorithms, dp, greedy, math

Odd Mineral Resource

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

Continuous City

bitmasks, constructive algorithms

Pattern Matching

bitmasks, data structures, dfs and similar, graphs, hashing, sortings, strings

Strange Definition

bitmasks, graphs, hashing, math, number theory

A Bit Similar

bitmasks, brute force, hashing, string suffix structures, strings, two pointers

Euclid's nightmare

bitmasks, dfs and similar, dsu, graphs, greedy, math, sortings

Apollo versus Pan

bitmasks, brute force, math

Max Correct Set

bitmasks, dp, math

Find The Array

bitmasks, constructive algorithms, greedy

Bitwise Queries (Hard Version)

bitmasks, constructive algorithms, interactive, math

Bitwise Queries (Easy Version)

bitmasks, constructive algorithms, interactive, math

Communism

bitmasks, dp, trees

Xor Tree

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

Cheat and Win

bitmasks, data structures, games, trees

Yurii Can Do Everything

binary search, bitmasks, brute force, constructive algorithms, divide and conquer, two pointers

Powerful Ksenia

bitmasks, constructive algorithms, math

Yet Another DAG Problem

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

Xum

bitmasks, constructive algorithms, math, matrices, number theory

Bubble Cup hypothesis

bitmasks, constructive algorithms, dp, math

Lookup Tables

bitmasks

XORwice

bitmasks, greedy, math

Rock and Lever

bitmasks, math

XOR Inverse

bitmasks, data structures, divide and conquer, dp, greedy, math, sortings, strings, trees

XOR-gun

bitmasks, brute force, constructive algorithms

No Game No Life

bitmasks, games, math, matrices

Poman Numbers

bitmasks, greedy, math, strings

Reverse and Swap

binary search, bitmasks, data structures

Mercenaries

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

Running Competition

bitmasks, fft, math, number theory

Boboniu and Bit Operations

bitmasks, brute force, dp, greedy

Omkar and Pies

bitmasks, dfs and similar, dp, math, shortest paths

Omkar and Duck

bitmasks, constructive algorithms, interactive, math

505

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

Joker

*special problem, bitmasks, data structures, divide and conquer, dsu

a-Good String

bitmasks, brute force, divide and conquer, dp, implementation

String Transformation 2

bitmasks, dp, graphs, trees

GameGame

bitmasks, constructive algorithms, dp, games, greedy, math

AND, OR and square sum

bitmasks, greedy, math

Secure Password

bitmasks, combinatorics, constructive algorithms, interactive, math

X-OR

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

Johnny and Another Rating Drop

bitmasks, greedy, math

Johnny and His Hobbies

bitmasks, brute force

Johnny and Megan's Necklace

binary search, bitmasks, constructive algorithms, dfs and similar, dsu, graphs

Binary Median

binary search, bitmasks, brute force, constructive algorithms

Spy-string

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

Make It Ascending

bitmasks, brute force, dp

Nastya and Scoreboard

bitmasks, dp, graphs, greedy