The Butcher

geometry, greedy, implementation, sortings, two pointers

Johnny and Grandmaster

greedy, implementation, math, sortings

Multicolored Cars

data structures, implementation

Find Pair

implementation, math, sortings

Sum of Progression

brute force, data structures, dp, implementation, math

Chess

brute force, implementation, math

Unshuffling a Deck

constructive algorithms, implementation

Amity Assessment

brute force, constructive algorithms, implementation

Mike's Sequence

*special problem, divide and conquer, implementation, math

Quiz League

implementation

Flea travel

implementation, math

Make It Increasing

binary search, constructive algorithms, data structures, dp, implementation

Predict Outcome of the Game

brute force, implementation, math

Maximum Control (easy)

implementation

Mahmoud and Ehab and the xor-MST

bitmasks, dp, graphs, implementation, math

Laboratory Work

implementation, math

Union of Doubly Linked Lists

implementation

Game of the Rows

brute force, greedy, implementation

Game on Axis

combinatorics, dfs and similar, dsu, graphs, implementation

Regular Bridge

constructive algorithms, graphs, implementation

Mishap in Club

greedy, implementation

Vladik and Memorable Trip

dp, implementation

Facetook Priority Wall

expression parsing, implementation, strings

Recover the String

constructive algorithms, greedy, implementation, math

Holidays

implementation

Bets

greedy, implementation

Best Pair

binary search, brute force, implementation

Suitable Replacement

binary search, greedy, implementation

Minimal Segment Cover

data structures, dfs and similar, divide and conquer, dp, greedy, implementation, trees

Circular Spanning Tree

constructive algorithms, implementation, trees

Nash Matrix

constructive algorithms, dfs and similar, graphs, implementation

Linguistics

greedy, implementation, sortings, strings

Decryption

constructive algorithms, implementation, math, number theory

Yet Another Array Queries Problem

data structures, implementation

Vanya and Computer Game

binary search, implementation, math, sortings

About Bacteria

implementation, math

Shuffling Songs

bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings

Non-Palindromic Substring

hashing, implementation, math, strings

Toy Sum

greedy, implementation, math

Island Puzzle

constructive algorithms, implementation

Grid Xor

constructive algorithms, greedy, implementation, interactive, math

New Year and Fireworks

brute force, data structures, dfs and similar, dp, implementation

Build a Tree and That Is It

constructive algorithms, implementation, trees

Om Nom and Spiders

implementation, math

Four Segments

brute force, constructive algorithms, geometry, implementation, math

Command Line Arguments

*special problem, implementation, strings

The Human Equation

greedy, implementation

Flag

brute force, combinatorics, dp, implementation

Let's Play the Words?

data structures, hashing, implementation, math

Permutation Game

implementation

Expand the Path

brute force, combinatorics, data structures, implementation, math

Mysterious strings

*special problem, implementation

Nearest Fraction

brute force, implementation, two pointers

Calendar

brute force, implementation

Balls and Boxes

constructive algorithms, greedy, implementation

Delete Them

constructive algorithms, implementation

Credit Card

data structures, dp, greedy, implementation

Secret

constructive algorithms, implementation

Marathon

implementation, math

Help Chef Gerasim

implementation, sortings

Extra-terrestrial Intelligence

implementation

Vlad and the Mountains

binary search, data structures, dsu, graphs, implementation, sortings, trees, two pointers

Kuroni and the Score Distribution

constructive algorithms, greedy, implementation, math

Inna and Huge Candy Matrix

implementation, math

Elimination

dp, implementation, math

Fibonacci Strings

greedy, implementation, math, number theory

Buses Between Cities

implementation

Vlad and Trouble at MIT

dfs and similar, dp, flows, graphs, greedy, implementation, trees

Into Blocks (easy version)

data structures, dsu, greedy, implementation, two pointers

Tyler and Strings

combinatorics, data structures, implementation

Rudolph and Mimic

constructive algorithms, implementation, interactive

Innokenty and a Football League

2-sat, graphs, greedy, implementation, shortest paths, strings

Little Artem and Dance

brute force, constructive algorithms, implementation

Inna and Pink Pony

greedy, implementation

Ravioli Sort

implementation

Solution for Cube

brute force, implementation

Treelabeling

bitmasks, constructive algorithms, dfs and similar, games, greedy, implementation, trees

Sum Graph

brute force, constructive algorithms, graphs, implementation, interactive, shortest paths, trees

Orchestra

brute force, implementation

Great Vova Wall (Version 2)

data structures, implementation

Traffic Lights

implementation

Square Earth?

dfs and similar, greedy, implementation

Up the hill

constructive algorithms, implementation

Funny Substrings

data structures, hashing, implementation, matrices, strings

Cards Sorting

data structures, implementation, sortings

Convex Shape

constructive algorithms, implementation

Spelling Check

hashing, implementation, strings

Red-Blue Operations (Easy Version)

binary search, greedy, implementation, math

GCD on a grid

brute force, dfs and similar, dp, implementation, math, number theory

Ehab and another another xor problem

bitmasks, constructive algorithms, implementation, interactive

Video Cards

brute force, data structures, implementation, math, number theory

Portals

data structures, dp, greedy, implementation, sortings

Simple XML

implementation

Guilty --- to the kitchen!

greedy, implementation

Testing Robots

implementation

No Palindromes

brute force, constructive algorithms, divide and conquer, greedy, hashing, implementation, math, strings

Segments Removal

data structures, dsu, flows, implementation, two pointers

Turing Tape

implementation

Splitting money

implementation

Maximize Sum of Digits

*special problem, implementation, math