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

Given Length and Sum of Digits...

dp, greedy, implementation

Fight the Monster

binary search, brute force, implementation

Palindrome Transformation

brute force, greedy, implementation

Factory

implementation, math, matrices

Bits

bitmasks, constructive algorithms

Friends and Presents

binary search, math

Interesting Array

constructive algorithms, data structures, trees

Long Jumps

binary search, greedy, implementation

Exams

greedy, sortings

Towers

brute force, constructive algorithms, greedy, implementation, sortings

Table Decorations

greedy

Dreamoon and Sums

math

Strongly Connected City

brute force, dfs and similar, graphs, implementation

Flowers

dp

Design Tutorial: Make It Nondeterministic

greedy

MUH and Cube Walls

string suffix structures, strings

MUH and House of Cards

binary search, brute force, greedy, math

Hexakosioihexekontahexaphobia

*special problem

Crystal Ball Sequence

*special problem, implementation

24 Game

constructive algorithms, greedy, math

George and Job

dp, implementation

Number of Ways

binary search, brute force, data structures, dp, two pointers

No to Palindromes!

greedy, strings

Present

binary search, data structures, greedy

Little Dima and Equation

brute force, implementation, math, number theory

Pashmak and Parmida's problem

data structures, divide and conquer, sortings

Golden System

math, meet-in-the-middle

Boredom

dp

Little Pony and Expected Maximum

probabilities

4-point polyline

brute force, constructive algorithms, geometry, trees

Predict Outcome of the Game

brute force, implementation, math

Jzzhu and Chocolate

greedy, math

Multiplication Table

binary search, brute force

Suffix Structures

implementation, strings

DZY Loves Sequences

dp, implementation, two pointers

DZY Loves Chemistry

dfs and similar, dsu, greedy

DZY Loves Physics

greedy, math

Kolya and Tandem Repeat

brute force, implementation, strings

Andrey and Problem

greedy, math, probabilities

Borya and Hanabi

bitmasks, brute force, implementation

Valera and Tubes

constructive algorithms, dfs and similar, implementation

Valera and Fruits

greedy, implementation