Blackjack

implementation

Buying Sets

flows, graph matchings

Time to Raid Cowavans

brute force, data structures, sortings

Russian Roulette

constructive algorithms, greedy

Cthulhu

dfs and similar, dsu, graphs

Testing Pants for Sadness

greedy, implementation, math

Sum of Digits

implementation

Clothes

brute force

Candies and Stones

divide and conquer, dp

Castle

dp, greedy, probabilities, sortings, trees

Vectors

implementation, math

Buses

binary search, data structures, dp

Homework

greedy

Interval Coloring

*special problem, greedy, math

Rotation

*special problem, geometry, math

Battleship

*special problem, dfs and similar, implementation

Name the album

*special problem, data structures, implementation

Polynom

*special problem, implementation

Lamps in a Line

*special problem, math

World of Mouth

*special problem, strings

A+B

*special problem, implementation

Friendly Numbers

*special problem, implementation

Carpeting the Room

*special problem, implementation

Help Chef Gerasim

implementation, sortings

Help Far Away Kingdom

strings

Help Shrek and Donkey

dp, games, math, probabilities

Help Monks

constructive algorithms

Help Greg the Dwarf

geometry, ternary search

Help King

implementation, probabilities, trees

Help Victoria the Wise

brute force, implementation

Leaders

dfs and similar, dsu, graphs, trees

Robot in Basement

bitmasks, brute force, implementation

Winning Strategy

binary search, graphs, math, shortest paths

Superset

constructive algorithms, divide and conquer

Domino

brute force, implementation

Lucky Numbers (easy)

binary search, bitmasks, brute force

Football

implementation, strings

Lucky Country

dp, dsu, graphs

Horse Races

dp, math

Volleyball

shortest paths

Lucky Numbers

dp, greedy

Hockey

implementation, strings

Friends

graphs, implementation, math

Restoring Password

implementation, strings

Lostborn

dp, math, number theory

Flags

dp, math, matrices

Azembler

brute force, implementation

End of Exams

greedy

Frames

implementation

Binary Number

greedy

Chips

implementation, math

Igloo Skyscraper

data structures, geometry

Grocer's Problem

constructive algorithms, graphs, greedy

Ski Base

combinatorics, dsu, graphs

Queue

binary search, data structures

Newspaper Headline

greedy, strings

African Crossword

implementation, strings

Cableway

greedy, math

Fire and Ice

greedy

Space mines

geometry

Chip Play

brute force, data structures, implementation

Widget Library

dp, expression parsing, graphs, implementation

Robbery

greedy

Keyboard

implementation

Chord

brute force, implementation

Mogohu-Rea Idol

geometry

Beautiful Road

dfs and similar, dp, dsu, graphs, implementation, sortings, trees

Interesting Game

dp, games, math

Vasya and Types

implementation, strings

Trains

implementation, math

Long sequence

brute force, math, matrices

Powerful array

data structures, implementation, math, two pointers

Genetic engineering

dp, string suffix structures, trees

Tetris revisited

constructive algorithms, graph matchings, greedy, math

Reflection

math

Guard Towers

binary search, dsu, geometry, graphs, sortings

Sum of Medians

binary search, brute force, data structures, implementation

Petya and Tree

binary search, dfs and similar, probabilities, sortings, trees

Embassy Queue

data structures, greedy

Domino

constructive algorithms, implementation

Biathlon

binary search, implementation

Toy Army

math, number theory

Two Subsequences

bitmasks, dp

Numbers

dp, math, number theory

Track

graphs, greedy, shortest paths

Doctor

binary search, math, sortings

Magical Array

math

Corridor

geometry

Two out of Three

dp

General Mobilization

data structures, dfs and similar, sortings

Sets

constructive algorithms, hashing, implementation

Double Cola

implementation, math

Pairs

dfs and similar, dp, dsu, graphs, implementation, trees

Polycarp's Picture Gallery

constructive algorithms, greedy

Average Score

greedy, math, sortings

Sequence Formatting

implementation, strings

Plug-in

implementation

Depression

geometry, math

Panoramix's Prediction

brute force

Security System

math