Chiori and Doll Picking (easy version)

bitmasks, brute force, combinatorics, math

Substring Search

bitmasks, brute force, fft

Walk on Matrix

bitmasks, constructive algorithms, math

...And after happily lived ever they

*special problem, bitmasks

Dreamoon Likes Sequences

bitmasks, combinatorics, math

Letters and Question Marks

bitmasks, dp, string suffix structures

AND Segments

bitmasks, combinatorics, data structures, dp, two pointers

Wise Men (Hard Version)

bitmasks, dp, math

Wise Men (Easy Version)

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

Ehab the Xorcist

bitmasks, constructive algorithms, greedy, number theory

Reality Show

bitmasks, dp

Present

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

Team Building

bitmasks, dp, greedy, sortings

Happy New Year

bitmasks, dp, implementation

Adding Powers

bitmasks, greedy, implementation, math, number theory, ternary search

Kuroni and Antihype

bitmasks, brute force, dp, dsu, graphs

Fill The Bag

bitmasks, greedy

Keep talking and nobody explodes -- easy

bitmasks, brute force, expression parsing

Around the World

bitmasks, combinatorics, dfs and similar, dp, graphs, graphs, math, trees

Nora's Toy Boxes

bitmasks, combinatorics, dp

Minimax Problem

binary search, bitmasks, dp

Dr. Evil Underscores

bitmasks, brute force, dfs and similar, divide and conquer, dp, greedy, strings, trees

Make Good

bitmasks, constructive algorithms, math

Xor-Set

bitmasks, divide and conquer, math

Make Them Similar

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

Daniel and Spring Cleaning

bitmasks, brute force, combinatorics, dp

Sum Balance

bitmasks, dfs and similar, dp, graphs

Keyboard Purchase

bitmasks, dp

Yet Another Substring Reverse

bitmasks, dp

To Make 1

bitmasks, constructive algorithms, dp, greedy, number theory

p-binary

bitmasks, brute force, math

Graph And Numbers

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

Alex and Julian

bitmasks, math, number theory

The Number Of Good Substrings

binary search, bitmasks, brute force

Marbles

bitmasks, dp

Feeling Good

bitmasks, data structures

Rotate Columns (hard version)

bitmasks, dp, greedy, sortings

Rotate Columns (easy version)

bitmasks, brute force, dp, greedy, sortings

Bits And Pieces

bitmasks, dfs and similar, dp, greedy

XOR Guessing

bitmasks, interactive, math

Shortest Cycle

bitmasks, brute force, graphs, shortest paths

You Are Given Two Binary Strings...

bitmasks, greedy

Count The Rectangles

bitmasks, brute force, data structures, geometry, sortings

Playlist for Polycarp (easy version)

bitmasks, combinatorics, dp

Two Pizzas

bitmasks, brute force

Ehab and the Expected XOR Problem

bitmasks, constructive algorithms

And Reachability

bitmasks, dp

The LCMs Must be Large

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

Magical Permutation

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

Neko Rules the Catniverse (Large Version)

bitmasks, dp, matrices

Neko Rules the Catniverse (Small Version)

bitmasks, dp, matrices

Neko Performs Cat Furrier Transform

bitmasks, constructive algorithms, dfs and similar, math

Dima and a Bad XOR

bitmasks, brute force, constructive algorithms, dp

Foo Fighters

bitmasks, constructive algorithms

Hot is Cold

bitmasks, data structures, divide and conquer, implementation

Tree Diameter

bitmasks, graphs, interactive

Mystery Circuit

bitmasks, brute force

Median String

bitmasks, math, number theory, strings

Crisp String

bitmasks, dp

Decypher the String

bitmasks, chinese remainder theorem, constructive algorithms, interactive, math

Please, another Queries on Array?

bitmasks, data structures, divide and conquer, math, number theory

Helping Hiasat

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

Professional layer

bitmasks, dp

Elongated Matrix

binary search, bitmasks, brute force, dp, graphs

Mateusz and an Infinite Sequence

bitmasks, brute force, dp, strings

Alex and a TV Show

bitmasks, combinatorics, number theory

Petr and a Combination Lock

bitmasks, brute force, dp

Powers Of Two

bitmasks, greedy

Multidimensional Queries

bitmasks, data structures

Ehab and another another xor problem

bitmasks, constructive algorithms, implementation, interactive

Segment Sum

bitmasks, combinatorics, dp, math

Bicolorings

bitmasks, dp

Make It One

bitmasks, combinatorics, dp, math, number theory, shortest paths

Vitamins

bitmasks, brute force, dp, implementation

Maximum Matching

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

Sources and Sinks

bitmasks, brute force, dfs and similar

Little C Loves 3 III

bitmasks, dp, math

Boolean Computer

bitmasks, brute force, fft, math

Vasya and Good Sequences

bitmasks, dp

X-mouse in the Campus

bitmasks, math, number theory

The Wu

bitmasks, brute force, data structures

Appropriate Team

bitmasks, math, number theory

Allowed Letters

bitmasks, flows, graph matchings, graphs, greedy

Pave the Parallelepiped

bitmasks, brute force, combinatorics, math, number theory

Xor-Paths

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

Sonya and Bitwise OR

bitmasks, data structures, divide and conquer

Careful Maneuvering

bitmasks, brute force, geometry

Open Communication

bitmasks, brute force

AND Graph

bitmasks, dfs and similar, dsu, graphs

Addition on Segments

bitmasks, data structures, divide and conquer, dp

Bookshelves

bitmasks, dp, greedy

Kuro and GCD and XOR and SUM

binary search, bitmasks, brute force, data structures, dp, dsu, greedy, math, number theory, strings, trees

Chessboard

bitmasks, brute force, implementation

Subsequence Counting

bitmasks, constructive algorithms, greedy, implementation

Mahmoud and Ehab and yet another xor task

bitmasks, dp, math, matrices

Mahmoud and Ehab and the xor-MST

bitmasks, dp, graphs, implementation, math

Shortest Path Queries

bitmasks, data structures, dsu, graphs

Erasing Substrings

bitmasks, dp, greedy

List Of Integers

binary search, bitmasks, brute force, combinatorics, math, number theory

Jamie and Binary Sequence (changed after round)

bitmasks, greedy, math