Dynamic Shortest Path

graphs, shortest paths

The Race

math

DZY Loves Strings

binary search, hashing, strings, two pointers

Restoration of the Permutation

greedy

Traveling Around the Golden Ring of Berland

*special problem, implementation

Bingo

bitmasks, combinatorics, dp, math, probabilities

Strange Addition

data structures, dp, matrices

Connecting Vertices

dp, graphs

Strange Operation

combinatorics, data structures, dp

The Red Button

combinatorics, dfs and similar, dsu, graphs, greedy

LEGOndary Grandmaster

combinatorics, dp, math

Friends

binary search, bitmasks, data structures, math

Vus the Cossack and a Graph

dfs and similar, graphs, greedy, implementation

2048

bitmasks, dp

Wrong Floyd

brute force, constructive algorithms, dfs and similar, graphs

Beautiful League

constructive algorithms, flows, graph matchings

Safe

brute force

Special Grid

brute force, dp, greedy

Number Challenge

combinatorics, dp, implementation, math, number theory

Vika and Stone Skipping

brute force, implementation, math, number theory

Game

math

DZY Loves Planting

binary search, dsu, trees

Diverse Substrings

dp, strings, two pointers

Smile House

binary search, graphs, matrices

Logical Expression

bitmasks, dp, shortest paths

Birthday

graph matchings, strings

Laboratory on Pluto

constructive algorithms, dp, greedy, math

Dima and Magic Guitar

brute force, implementation, math

Wine Factory (Hard Version)

data structures, dp, flows, greedy, matrices

Crossword

implementation

Prefix Sums

binary search, brute force, combinatorics, math, matrices

Xenolith? Hippodrome?

*special problem, number theory

Paint Tree

constructive algorithms, divide and conquer, geometry, sortings, trees

Vova Escapes the Matrix

brute force, dfs and similar, divide and conquer, shortest paths

Misha and Paintings

constructive algorithms, data structures, greedy, implementation, math

Bear and Fair Set

flows, graphs

Painting Square

dp, fft

Cutting Jigsaw Puzzle

hashing, implementation

Min Cost Permutation (Easy Version)

brute force, constructive algorithms, greedy, math

Bracket Insertion

combinatorics, dp, math, trees

BinCoin

binary search, divide and conquer, hashing, implementation, probabilities, trees

Bubble Cup hypothesis

bitmasks, constructive algorithms, dp, math

Edge coloring of bipartite graph

graphs

On Corruption and Numbers

constructive algorithms, implementation, math

New Year and Entity Enumeration

bitmasks, combinatorics, dp, math

Quest

dp, greedy

Leha and security system

data structures

Restoring Numbers

constructive algorithms, math

Interesting Sections

data structures, divide and conquer, meet-in-the-middle, two pointers

Minlexes

dp, greedy, implementation, strings

Intriguing Selection

brute force, constructive algorithms, implementation, interactive, sortings

Find a car

combinatorics, divide and conquer, dp

BF Calculator

*special problem

Palindrome XOR

dfs and similar, graphs

One-Four Overload

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

Polygons

greedy, math, number theory

Switch and Flip

constructive algorithms, graphs, math

Sum of Prefix Sums

data structures, divide and conquer, geometry, trees

Greedy Merchants

Happy Farm 5

geometry

Juju and Binary String

brute force, constructive algorithms, greedy, math

Vasya and Endless Credits

dp, flows, graph matchings, graphs, sortings

Superior Periodic Subarrays

number theory

Music in Car

data structures, greedy, two pointers

Surprise me!

divide and conquer, math, number theory, trees

Yash And Trees

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

Arrow

geometry

Find a Gift

binary search, interactive, probabilities

Black-and-White Cube

combinatorics, constructive algorithms

More Queries to Array...

data structures, math

Misha and Palindrome Degree

binary search, combinatorics, implementation

Petya and Coloring

combinatorics, dp

Attack on Red Kingdom

games, two pointers

Out of Controls

*special problem

Cow Tennis Tournament

combinatorics, data structures, math

Shave Beaver!

implementation

Map

data structures, implementation, sortings

Button Lock

flows, graph matchings, graphs

Sweets Game

bitmasks, dfs and similar, dp, games, implementation

Calendar

greedy, strings

Maximum And Queries (hard version)

bitmasks, divide and conquer, dp, greedy

BerDonalds

graphs, math, shortest paths

Segments on the Line

binary search, dp

E-reader Display

constructive algorithms, greedy

Traveling in Berland

binary search, data structures, graphs, greedy, implementation

Discarding Game

dp, greedy, two pointers

Playlist for Polycarp (hard version)

combinatorics, dp

Tavas in Kansas

dp, games

Chicken or Fish?

greedy

Optimal Sum

data structures, greedy

Name

greedy, strings

Timber

combinatorics, dp, fft, math

A Random Code Problem

combinatorics, dp, math, number theory, probabilities

Award Ceremony

greedy, implementation

Eels

data structures

Min-Fund Prison (Easy)

dfs and similar, trees

Two Centroids

data structures, dfs and similar, greedy, trees

Roads and Ramen

data structures, trees

Generate Bell state

*special problem

Sonya and Bitwise OR

bitmasks, data structures, divide and conquer