School Marks

greedy, implementation

Summer Dichotomy

2-sat, data structures, dfs and similar, greedy

Berserk Robot

constructive algorithms, math, sortings

A Heap of Heaps

brute force, data structures, math, sortings

Demiurges Play Again

dfs and similar, dp, math, trees

Weird Chess

brute force, constructive algorithms, implementation

Tourist's Notes

binary search, brute force, greedy, implementation, math

Tavas on the Path

data structures, divide and conquer, trees

Tavas in Kansas

dp, games

Tavas and Pashmaks

geometry, math

Tavas and Malekas

greedy, hashing, string suffix structures, strings

Tavas and Karafs

binary search, greedy, math

Simplified Nonogram

bitmasks, dp, hashing, meet-in-the-middle

Berland Local Positioning System

constructive algorithms, greedy, hashing, implementation

Handshakes

binary search, constructive algorithms, data structures, greedy

Polycarpus' Dice

math

Encoding

hashing, string suffix structures, strings

Correcting Mistakes

constructive algorithms, dp, greedy, hashing, strings, two pointers

Landmarks

data structures, dp

Board Game

games, greedy, implementation, math

Work Group

dfs and similar, dp, graphs, strings, trees

Berland Miners

binary search, data structures, dfs and similar, greedy, trees

Different variables

*special problem

Points in triangle

*special problem, geometry

Levenshtein distance

*special problem

Jumping frogs

*special problem

Sum and product

*special problem

Set subtraction

*special problem

String inside out

*special problem

Group Photo 2 (online mirror version)

brute force, greedy, sortings

Triangles 3000

geometry, sortings

Fuzzy Search

bitmasks, brute force, fft

Data Center Drama

dfs and similar, graphs

Clique Problem

data structures, dp, greedy, implementation, sortings

Spiders Evil Plan

greedy, trees

Pudding Monsters

data structures, divide and conquer

Transmitting Levels

dp, implementation

Om Nom and Necklace

hashing, string suffix structures, strings

Om Nom and Candies

brute force, greedy, math

Anya and Cubes

binary search, bitmasks, brute force, dp, math, meet-in-the-middle

Arthur and Walls

constructive algorithms, data structures, graphs, greedy, shortest paths

Ilya and Sticks

greedy, math, sortings

And Yet Another Bracket Sequence

data structures, greedy, hashing, string suffix structures, strings

Rooks and Rectangles

data structures, sortings

Social Network

greedy, two pointers

The Art of Dealing with ATM

binary search, sortings

Фото на память - 2 (round version)

dp, greedy

Возможно, вы знаете этих людей?

implementation

Statistics of Recompressing Videos

*special problem, data structures, implementation

Closest Equals

*special problem, data structures

Chicken or Fish?

greedy

Cycling City

dfs and similar, graphs

Shop

greedy

Pluses everywhere

combinatorics, dp, math, number theory

Cubes

games, greedy, implementation

A and B and Lecture Rooms

binary search, data structures, dfs and similar, dp, trees

A and B and Interesting Substrings

data structures, dp, two pointers

Pasha and Pipe

binary search, brute force, combinatorics, dp, implementation

Arthur and Questions

greedy, implementation, math, ternary search

Ilya and Escalator

combinatorics, dp, math, probabilities

Anya and Smartphone

constructive algorithms, data structures, implementation

Vitaly and Strings

constructive algorithms, strings

Drazil and His Happy Friends

math, number theory

Drazil and Morning Exercise

dfs and similar, dp, dsu, trees, two pointers

Drazil and Park

data structures

Drazil and Tiles

constructive algorithms, greedy

Darth Vader and Tree

dp, matrices

R2D2 and Droid Army

binary search, data structures, two pointers

Watto and Mechanism

binary search, data structures, hashing, string suffix structures, strings

Inversions problem

dp

Inversions problem

dp, probabilities

Inversions problem

brute force, dfs and similar, dp, meet-in-the-middle

Scaygerboss

flows

Scaygerboss

flows

Subarray Cuts

dp

Subarray Cuts

dp

Constrained Tree

constructive algorithms, data structures

Constrained Tree

dfs and similar

Second price auction

bitmasks, probabilities

Permutations

bitmasks, divide and conquer, math

Fox And Polygon

constructive algorithms, divide and conquer

Fox And Travelling

dp, trees

Fox And Dinner

flows

Fox And Jumping

bitmasks, brute force, dp, math

Fox And Names

dfs and similar, graphs, sortings

Progress Monitoring

dp, trees

Pretty Song

math, strings

Restoring Numbers

constructive algorithms, math

Sums of Digits

dp, greedy, implementation

Arthur and Brackets

dp, greedy

Tanya and Password

dfs and similar, graphs

Anya and Ghosts

constructive algorithms, greedy

Breaking Good

dfs and similar, dp, graphs, shortest paths

The Maths Lecture

dp, implementation

Guess Your Way Out!

implementation, math, trees

Mr. Kitayuta's Gift

combinatorics, dp, matrices, strings

Mr. Kitayuta's Colorful Graph

brute force, dfs and similar, dsu, graphs

Mr. Kitayuta vs. Bamboos

binary search, greedy

Mr. Kitayuta's Technology

dfs and similar

Mr. Kitayuta, the Treasure Hunter

dfs and similar, dp, two pointers