Yaroslav and Algorithm

constructive algorithms

Garden

bitmasks, dp, graphs, trees

Interactive Factorial Guessing

brute force, games, implementation, interactive

New Year and Cleaning

binary search, implementation

A Story of One Country (Easy)

brute force, divide and conquer, sortings

Runaway to a Shadow

geometry, sortings

Cutting a Fence

binary search, data structures, dsu

Half-decay tree

data structures, divide and conquer, dp, math, probabilities

Palindromic Parentheses

constructive algorithms

Electrical Efficiency

combinatorics, data structures, dp, math, number theory, trees

Strange Radiation

binary search, implementation, math

Guards In The Storehouse

bitmasks, dp

One Node is Gone

constructive algorithms, implementation, trees

Horse Races

dp, math

Keen Tree Calculation

binary search, data structures, dp, geometry, graphs, implementation, trees

Sereja and Cinema

combinatorics, math

Azembler

brute force, implementation

Igor and Interesting Numbers

brute force, combinatorics, dp, math

Dividing Kingdom

binary search, brute force, data structures

Colorful Stones

dp, two pointers

Cactus Search

interactive

Representative Sampling

Savior

brute force, dsu, math

Rhombus

brute force, data structures, dp

Game with Tokens

data structures, games, implementation

Wilbur and Strings

dfs and similar, dp, graphs, strings

The Evil Temple and the Moving Rocks

constructive algorithms

Dish Shopping

data structures, divide and conquer

Shooting Gallery

data structures, implementation

Digits

brute force, implementation, math

Product Tuples

divide and conquer, fft

Journey

dp, trees

SmartGarden

constructive algorithms, divide and conquer

Packmen Strike Back

binary search, dp, math

Shoe Store

dp, graph matchings, greedy, sortings, two pointers

New Year Tree Decorations

geometry, schedules, sortings

Flags

dp, math, matrices

Max and Min

geometry

Not Quick Transformation

divide and conquer, math

Journey

dp, math

Last chance

data structures, flows, graph matchings, graphs, trees

Save the City!

geometry

Hyper String

dp

Help Greg the Dwarf

geometry, ternary search

Shaass and Painter Robot

brute force, implementation, number theory

Cycle

brute force, dfs and similar, implementation

Madness

constructive algorithms, dfs and similar, trees

Interactive Bulls and Cows (Hard)

brute force, constructive algorithms, interactive

Little Elephant and Triangle

geometry, math

Lucky Segments

binary search, implementation, two pointers

Deck-Building Game

divide and conquer, math

Deputies

constructive algorithms, graphs, greedy, implementation

Summer Reading

dp, greedy

Special Graph

Space mines

geometry

Berland.Taxi

data structures

HQ

*special problem, constructive algorithms

Two Circles

brute force, data structures, implementation

Lift and Throw

brute force

Help Monks

constructive algorithms

Poachers

dp, games, graphs, trees

Olympic Games

math

Row of Models

greedy, sortings

Clever Fat Rat

dp

Colored Jenga

dfs and similar, dp, probabilities

Goats and Wolves

greedy

Tram

Painting Numbers

*special problem, data structures, greedy, number theory

Emperor's Problem

geometry

Combostone

games, implementation

A Battle Against a Dragon

*special problem, data structures, dp

King's Path

*special problem, math, trees

Different variables

*special problem

Loader

*special problem, graphs

Ciel and Gondolas

data structures, divide and conquer, dp

The Sum of the k-th Powers

math

Willem, Chtholly and Seniorious

data structures, probabilities

Least Cost Bracket Sequence

greedy

Machine Learning

brute force, data structures

Mike and Fish

constructive algorithms, dfs and similar, graphs

Arpa’s overnight party and Mehrdad’s silent entering

constructive algorithms, dfs and similar, graphs

Product Sum

data structures, dp, geometry

Bits And Pieces

bitmasks, dfs and similar, dp, greedy

Binary Table

bitmasks, brute force, divide and conquer, dp, fft, math

Stack Exterminable Arrays

data structures, divide and conquer, dp, hashing

Integer Game

constructive algorithms, games, interactive, math

Graph and Queries

data structures, dsu, graphs, implementation, trees

Ehab's REAL Number Theory Problem

brute force, dfs and similar, graphs, number theory, shortest paths

Lizards and Basements 2

brute force, dp

Data Center Drama

dfs and similar, graphs

TorCoder

data structures

Cards

combinatorics, dp, math, number theory, probabilities

Phoenix and Earthquake

constructive algorithms, dfs and similar, dsu, graphs, greedy, trees

Nearest Leaf

data structures, trees

Greedy Shopping

binary search, data structures, divide and conquer, greedy, implementation

Quantifier Question

dfs and similar, dp, graphs, math

Frequency Problem (Easy Version)

data structures, greedy

Commentator problem

geometry

Deleting Numbers

interactive, math, number theory

Crypto Lights

combinatorics, dp, math, probabilities