Number of Ways

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

Wonder Room

brute force, math

Cheap Travel

implementation

Inbox (100500)

implementation

inc ARG

implementation

The Classic Problem

data structures, graphs, shortest paths

World of Darkraft - 2

dp, probabilities

Substitutes in Number

dp

Restore Cube

brute force, geometry

No to Palindromes!

greedy, strings

Caisa and Tree

brute force, dfs and similar, math, number theory, trees

Gargari and Permutations

dfs and similar, dp, graphs, implementation

Gargari and Bishops

greedy, hashing, implementation

Caisa and Pylons

brute force, implementation, math

Caisa and Sugar

brute force, implementation

Appleman and Card Game

greedy

Appleman and Easy Task

brute force, implementation

Appleman and a Game

binary search, shortest paths, strings

Appleman and Complicated Task

dsu, math

Appleman and a Sheet of Paper

data structures, implementation

Appleman and Tree

dfs and similar, dp, trees

Appleman and Toastman

greedy, sortings

Roland and Rose

brute force, geometry, math, sortings

Little Victor and Set

brute force, constructive algorithms, math

Present

binary search, data structures, greedy

Little Dima and Equation

brute force, implementation, math, number theory

Vasya and Socks

brute force, implementation, math

Pashmak and Graph

dp, sortings

Pashmak and Parmida's problem

data structures, divide and conquer, sortings

Pashmak and Buses

combinatorics, constructive algorithms, math

Pashmak and Flowers

combinatorics, implementation, sortings

Pashmak and Garden

implementation

An easy problem about trees

dp, games, greedy, trees

Flow Optimality

constructive algorithms, flows, math

Bingo!

combinatorics, math, probabilities

Elections

brute force

Distributed Join

greedy

Golden System

math, meet-in-the-middle

Fedya and Maths

math, number theory

Laptops

sortings

Function

data structures

Serega and Fun

data structures

Civilization

dfs and similar, dp, dsu, ternary search, trees

A Lot of Games

dfs and similar, dp, games, implementation, strings, trees

Boredom

dp

Little Pony and Sort by Shift

implementation

Little Pony and Crystal Mine

implementation

Little Pony and Lord Tirek

data structures

Little Pony and Elements of Harmony

dp, matrices

Little Pony and Summer Sun Celebration

constructive algorithms, dfs and similar, graphs

Little Pony and Harmony Chest

bitmasks, brute force, dp

Little Pony and Expected Maximum

probabilities

Permutation

data structures, divide and conquer, hashing

Three strings

data structures, dsu, string suffix structures, strings

Washer, Dryer, Folder

greedy, implementation

Magic Trick

combinatorics, math, probabilities

4-point polyline

brute force, constructive algorithms, geometry, trees

Eevee

brute force, implementation, strings

Devu and Flowers

bitmasks, combinatorics, number theory

Count Good Substrings

math

Predict Outcome of the Game

brute force, implementation, math

Sort the Array

implementation, sortings

Game With Sticks

implementation

Jzzhu and Sequences

implementation, math

Jzzhu and Children

implementation

Jzzhu and Squares

dp, math, number theory

Jzzhu and Numbers

bitmasks, combinatorics, dp

Jzzhu and Apples

constructive algorithms, number theory

Jzzhu and Cities

graphs, greedy, shortest paths

Jzzhu and Chocolate

greedy, math

Divisors

brute force, dfs and similar, implementation, number theory

Multiplication Table

binary search, brute force

Painting Fence

divide and conquer, dp, greedy

Suffix Structures

implementation, strings

Rewards

implementation

DZY Loves Strings

greedy, implementation

DZY Loves Hash

implementation

DZY Loves Bridges

math, matrices

DZY Loves Games

math, matrices, probabilities

DZY Loves Fibonacci Numbers

data structures, math, number theory

DZY Loves Modification

brute force, data structures, greedy

DZY Loves Sequences

dp, implementation, two pointers

DZY Loves Chemistry

dfs and similar, dsu, greedy

DZY Loves Chessboard

dfs and similar, implementation

DZY Loves Planting

binary search, dsu, trees

DZY Loves Strings

binary search, hashing, strings, two pointers

DZY Loves Colors

data structures

DZY Loves FFT

probabilities

DZY Loves Physics

greedy, math

Kolya and Tandem Repeat

brute force, implementation, strings

Anton and Letters

constructive algorithms, implementation

Gena and Second Distance

geometry

Adam and Tree

data structures, trees

Artem and Array

data structures, greedy

Andrey and Problem

greedy, math, probabilities

Borya and Hanabi

bitmasks, brute force, implementation

Valera and Number

bitmasks, dp, math, probabilities

Valera and Swaps

constructive algorithms, dsu, graphs, implementation, math, string suffix structures

Valera and Tubes

constructive algorithms, dfs and similar, implementation

Valera and Fruits

greedy, implementation