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

Password

bitmasks, dp, shortest paths

Beaver

data structures, dp, greedy, hashing, strings, two pointers

Colorful Field

implementation, sortings

Bus Game

greedy

Evacuation

flows, graphs, shortest paths

Archer's Shot

binary search, geometry, math, two pointers

Beaver Game

dp, games, number theory

Easter Eggs

constructive algorithms, implementation

Haiku

implementation, strings

Martian Food

geometry

Domino Carpet

dp, implementation

Beavermuncher-0xFF

dfs and similar, dp, dsu, greedy, trees

Falling Anvils

math, probabilities

Heroes

brute force, implementation

Tourist

binary search, data structures, dp

Points

implementation, math

Plus and xor

dp, greedy, math

Mutation

bitmasks, dp, math

Mice

greedy, two pointers

Gift

dsu, graphs, sortings, trees

Ship's Shortest Path

geometry, shortest paths

Big Maximum Sum

data structures, dp, greedy, implementation, math, trees

Modified GCD

binary search, number theory

Facetook Priority Wall

expression parsing, implementation, strings

Life Without Zeros

implementation

Shift It!

constructive algorithms

Hanger

data structures

Chessboard Billiard

dfs and similar, dsu, graphs, number theory

Train

dp, games, greedy

Room Leader

implementation

Plane of Tanks

brute force, geometry