Median Smoothing

implementation

Duff and Weight Lifting

greedy

Phillip and Trains

dfs and similar, graphs, shortest paths

Gennady the Dentist

brute force, implementation

Dima and Lisa

brute force, math, number theory

Marina and Vasya

constructive algorithms, greedy, strings

Kolya and Tanya

combinatorics

GCD Table

constructive algorithms, greedy, number theory

Three Logos

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

Developing Skills

implementation, math, sortings

Kefa and Dishes

bitmasks, dp

Kefa and Park

dfs and similar, graphs, trees

Kefa and Company

binary search, sortings, two pointers

"Or" Game

brute force, greedy

A Problem about Polyline

geometry, math

Vasya and Petya's Game

math, number theory

Bots

combinatorics, dp, math, number theory

Tablecity

constructive algorithms, implementation

Bear and Three Musketeers

brute force, dfs and similar, graphs, hashing

Bear and Blocks

binary search, data structures, dp, math

Replacement

constructive algorithms, data structures, implementation

Music

implementation, math

Primes or Palindromes?

brute force, implementation, math, number theory

One-Dimensional Battle Ships

binary search, data structures, greedy, sortings

Geometric Progression

binary search, data structures, dp

Clique in the Divisibility Graph

dp, math, number theory

Equivalent Strings

divide and conquer, hashing, sortings, strings

Gerald's Hexagon

brute force, geometry, math

Pasha and Tea

constructive algorithms, implementation, math, sortings

Case of Matryoshkas

implementation

Kyoya and Colored Balls

combinatorics, dp, math

ZgukistringZ

brute force, constructive algorithms, implementation, strings

Divisibility by Eight

brute force, dp, math

Preparing Olympiad

bitmasks, brute force

Two Substrings

brute force, dp, greedy, implementation, strings

Mike and Fun

brute force, dp, greedy, implementation

Soldier and Number Game

constructive algorithms, dp, math, number theory

Soldier and Cards

brute force, dfs and similar, games

Woodcutters

dp, greedy

Sea and Islands

constructive algorithms, implementation

Writing Code

dp

School Marks

greedy, implementation

Weird Chess

brute force, constructive algorithms, implementation

Tourist's Notes

binary search, brute force, greedy, implementation, math

Quasi Binary

constructive algorithms, dp, greedy, implementation

Cutting Banner

brute force, implementation

Polycarpus' Dice

math

Covered Path

dp, greedy, math

Correcting Mistakes

constructive algorithms, dp, greedy, hashing, strings, two pointers

Board Game

games, greedy, implementation, math

Sum and product

*special problem

Set subtraction

*special problem

Diophantine equation

*special problem

String inside out

*special problem

Quadratic equation

*special problem

Clique Problem

data structures, dp, greedy, implementation, sortings

Glass Carving

binary search, data structures, implementation

Error Correct System

greedy

Om Nom and Dark Park

dfs and similar, greedy, implementation

Ilya and Sticks

greedy, math, sortings

Pasha and String

constructive algorithms, greedy, math, strings

Фото на память - 2 (round version)

dp, greedy

Возможно, вы знаете этих людей?

implementation

Statistics of Recompressing Videos

*special problem, data structures, implementation

Name Quest

*special problem, greedy

Mean Requests

*special problem, implementation

DNA Alignment

math, strings

Two Buttons

dfs and similar, graphs, greedy, implementation, math, shortest paths

A and B and Interesting Substrings

data structures, dp, two pointers

Ilya and Escalator

combinatorics, dp, math, probabilities

Anya and Smartphone

constructive algorithms, data structures, implementation

Tanya and Postcard

greedy, implementation, strings

Vitaly and Strings

constructive algorithms, strings

Drazil and Factorial

greedy, math, sortings

Han Solo and Lazer Gun

brute force, data structures, geometry, implementation, math

Inversions problem

brute force, dfs and similar, dp, meet-in-the-middle

Permutations

bitmasks, divide and conquer, math

Permutations

brute force

Fox And Names

dfs and similar, graphs, sortings

Fox And Two Dots

dfs and similar

Anya and Ghosts

constructive algorithms, greedy

Guess Your Way Out!

implementation, math, trees

Amr and Pins

geometry, math

Mr. Kitayuta's Colorful Graph

dfs and similar, dp, dsu, graphs

Misha and Forest

constructive algorithms, data structures, greedy, sortings, trees

New Year Book Reading

constructive algorithms, greedy, implementation, math

New Year Permutation

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

Crazy Town

geometry

Removing Columns

brute force, constructive algorithms, implementation

Secret Combination

brute force, constructive algorithms, implementation

Modular Equations

math, number theory

Treasure

greedy

Vasya and Chess

constructive algorithms, games, math

Vasya and Basketball

binary search, brute force, data structures, implementation, sortings, two pointers

Vasya and Wrestling

implementation

Vanya and Computer Game

binary search, implementation, math, sortings

Vanya and Exams

greedy, sortings

Hacking Cypher

brute force, math, number theory, strings

Queue

dsu, implementation

Unbearable Controversy of Being

brute force, combinatorics, dfs and similar, graphs