And

greedy

Planning The Expedition

binary search, brute force, implementation

Three Parts of the Array

binary search, data structures, two pointers

Polycarp's Practice

greedy, implementation, sortings

Oracle for f(x) = b * x mod 2

Oracle for f(x) = parity of the number of 1s in x

*special problem

Codehorses T-shirts

greedy, implementation

Alphabetic Removals

implementation

Cutting

dp, greedy, sortings

Micro-World

greedy, sortings

A Tide of Riverscape

constructive algorithms, strings

Switches and Lamps

implementation

Row

brute force, constructive algorithms

Less or Equal

sortings

Lecture Sleep

data structures, dp, implementation, two pointers

Check the string

implementation

Mahmoud and Ehab and the message

dsu, greedy, implementation

Encryption (easy)

brute force

Points on the line

brute force, greedy, sortings

A Prosperous Lot

constructive algorithms, implementation

World Cup

constructive algorithms, implementation

Login Verification

*special problem, strings

Tea Queue

implementation

Conan and Agasa play a Card Game

games, greedy, implementation

Christmas Spruce

implementation, trees

Two Cakes

binary search, brute force, implementation

New Year and Buggy Bot

brute force, implementation

Boxes Packing

greedy

The Modcrab

greedy, implementation

Coloring a Tree

dfs and similar, dsu, greedy

Months and Years

implementation

Pizza Separation

brute force, implementation

Wrath

greedy, implementation, two pointers

Table Tennis

data structures, implementation

Classroom Watch

brute force, math

Maximum of Maximums of Minimums

greedy

Maxim Buys an Apartment

constructive algorithms, math

Kirill And The Game

brute force, two pointers

Restaurant Tables

implementation

Treasure Hunt

implementation, math, number theory

Sagheer and Crossroads

implementation

Vladik and Complicated Book

implementation, sortings

Distances to Zero

constructive algorithms

April Fools' Problem (easy)

greedy, sortings

Cutting Carrot

geometry, math

The Monster

brute force, math, number theory

Dishonest Sellers

constructive algorithms, greedy, sortings

Sherlock and his girlfriend

constructive algorithms, number theory

Maximum Number

*special problem, constructive algorithms, greedy, implementation

News About Credit

*special problem, greedy, two pointers

Table Tennis Game 2

math

Lesha and array splitting

constructive algorithms, greedy, implementation

Parallelogram is Back

brute force, constructive algorithms, geometry

Chloe and the sequence

binary search, bitmasks, constructive algorithms, implementation

Vladik and flights

constructive algorithms, greedy, implementation

Alyona and flowers

constructive algorithms

Sanatorium

binary search, constructive algorithms, greedy, implementation, math

Spotlights

dp, implementation

Food on the Plane

implementation, math

Verse Pattern

implementation, strings

Potions Homework

implementation, sortings

Filya and Homework

implementation, sortings

Letters Cyclic Shift

constructive algorithms, greedy, implementation, strings

Cells Not Under Attack

data structures, math

The Wall (easy)

The Check of the Point

*special problem, geometry

Alyona and Mex

sortings

Co-prime Array

greedy, implementation, math, number theory

Tanya and Toys

greedy, implementation

Beautiful Paintings

greedy, sortings

Mischievous Mess Makers

greedy, math

Amity Assessment

brute force, constructive algorithms, implementation

Bear and Displayed Friends

implementation

Chat Order

*special problem, binary search, constructive algorithms, data structures, sortings

Grandma Laura and Apples

Print Check

constructive algorithms, implementation

Game

games, math

Moore's Law

math

War of the Corporations

constructive algorithms, greedy, strings

HDD is Outdated Technology

implementation, math

Magic Spheres

implementation

2Char

brute force, implementation

PawnChess

implementation

Rebranding

implementation, strings

Robot's Task

greedy, implementation

Bear and Elections

greedy, implementation

Inventory

greedy, math

Gerald is into Art

constructive algorithms, implementation

Ohana Cleans Up

brute force, greedy, strings

Vanya and Books

implementation, math

Soldier and Badges

brute force, greedy, implementation, sortings

Rotate, Flip and Zoom

*special problem, implementation

Reposts

*special problem, dfs and similar, dp, graphs, trees

Chewbaсca and Number

greedy, implementation

Vanya and Lanterns

binary search, implementation, math, sortings

BerSU Ball

dfs and similar, dp, graph matchings, greedy, sortings, two pointers

SwapSort

greedy, implementation, sortings

Diverse Permutation

constructive algorithms, greedy

Worms

binary search, implementation

Cheap Travel

implementation