Prefix-Suffix Palindrome (Hard version)

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

Permutation Partitions

combinatorics, greedy, math

Ehab's Last Theorem

constructive algorithms, dfs and similar, graphs, greedy

Ehab the Xorcist

bitmasks, constructive algorithms, greedy, number theory

Ehab and Path-etic MEXs

constructive algorithms, dfs and similar, greedy, trees

CopyCopyCopyCopyCopy

greedy, implementation

EhAb AnD gCd

constructive algorithms, greedy, number theory

Frog Jumps

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

Count Subrectangles

binary search, greedy, implementation

Even Subset Sum Problem

brute force, dp, greedy, implementation

Unusual Competitions

greedy

Remove Adjacent

brute force, constructive algorithms, greedy, strings

Contest for Robots

greedy

Journey Planning

data structures, dp, greedy, math, sortings

Team Building

bitmasks, dp, greedy, sortings

Restoring Permutation

greedy

Homecoming

binary search, dp, greedy, strings

Skyscrapers (hard version)

data structures, dp, greedy

Skyscrapers (easy version)

brute force, data structures, dp, greedy

Different Rules

constructive algorithms, greedy, implementation, math

Fast Food Restaurant

brute force, greedy, implementation

Array Shrinking

dp, greedy

Adding Powers

bitmasks, greedy, implementation, math, number theory, ternary search

Two Regular Polygons

geometry, greedy, math, number theory

Add Odd or Subtract Even

greedy, implementation, math

Recommendations

data structures, greedy, sortings

Cow and Treats

binary search, combinatorics, dp, greedy, implementation, math

Cow and Fields

binary search, data structures, dfs and similar, graphs, greedy, shortest paths, sortings

Cow and Friend

geometry, greedy, math

Cow and Haybales

greedy, implementation

Kuroni the Private Tutor

binary search, greedy

Kuroni and the Score Distribution

constructive algorithms, greedy, implementation, math

Kuroni and Simple Strings

constructive algorithms, greedy, strings, two pointers

Kuroni and the Gifts

brute force, constructive algorithms, greedy, sortings

Animal Observation (hard version)

data structures, dp, greedy

Shortest and Longest LIS

constructive algorithms, graphs, greedy, two pointers

Air Conditioner

dp, greedy, implementation, sortings, two pointers

Longest Palindrome

brute force, constructive algorithms, greedy, implementation, strings

Fill The Bag

bitmasks, greedy

Perfect Keyboard

dfs and similar, greedy, implementation

Ayoub's function

binary search, combinatorics, greedy, math, strings

Motarack's Birthday

binary search, greedy, ternary search

Assigning to Classes

greedy, implementation, sortings

Water Balance

data structures, geometry, greedy

Anu Has a Function

brute force, greedy, math

Movie Fan

*special problem, data structures, greedy, implementation, sortings

Bonus Distribution

*special problem, binary search, greedy, sortings

Dream Team

*special problem, greedy

Berland Beauty

constructive algorithms, dfs and similar, greedy, sortings, trees

String Coloring (easy version)

constructive algorithms, dp, graphs, greedy, sortings

Fight with Monsters

greedy, sortings

Obtain The String

dp, greedy, strings

Display The Number

greedy

Three Paths on a Tree

dfs and similar, dp, greedy, trees

Obtain a Permutation

greedy, implementation, math

MEX maximizing

data structures, greedy, implementation, math

Product of Three Numbers

greedy, math, number theory

JOE is on TV!

combinatorics, greedy, math

Rin and The Unknown Flower

constructive algorithms, greedy, interactive, math

Chaotic V.

dp, graphs, greedy, math, number theory, trees

Xenon's Attack on the Gangs

combinatorics, dfs and similar, dp, greedy, trees

Aroma's Search

brute force, constructive algorithms, geometry, greedy, implementation

Array Sharpening

greedy, implementation

Even But Not Even

greedy, math, strings

Angry Students

greedy, implementation

Numbers on Tree

constructive algorithms, data structures, dfs and similar, graphs, greedy, trees

Garland

dp, greedy, sortings

Dr. Evil Underscores

bitmasks, brute force, dfs and similar, divide and conquer, dp, greedy, strings, trees

Just Eat It!

dp, greedy, implementation

DIY Garland

constructive algorithms, greedy, trees

New Year Parties

dp, greedy

Christmas Trees

graphs, greedy, shortest paths

Petya and Exam

greedy, sortings, two pointers

K for the Price of One (Hard Version)

dp, greedy, sortings

K for the Price of One (Easy Version)

dp, greedy, sortings

Azamon Web Services

greedy

Miss Punyverse

dp, greedy, trees

Jeremy Bearimy

dfs and similar, graphs, greedy, trees

Berry Jam

data structures, dp, greedy, implementation

A and B

greedy, math

Make Them Odd

greedy, number theory

Beautiful Rectangle

brute force, combinatorics, constructive algorithms, data structures, greedy, math

As Simple as One and Two

dp, greedy

Snow Walking Robot

constructive algorithms, greedy, implementation

Three Friends

brute force, greedy, math, sortings

Portals

data structures, dp, greedy, implementation, sortings

Shawarma Tent

brute force, geometry, greedy, implementation

Blocks

greedy, math

Suits

brute force, greedy, math

Interesting Subarray

constructive algorithms, greedy, math

Card Game

games, greedy, math

Domino for Young

dp, greedy, math

Long Beautiful Integer

constructive algorithms, greedy, implementation, strings

Just Arrange the Icons

greedy, implementation, math

Elections

greedy

Spaceship Solitaire

data structures, greedy, implementation

Decreasing Debts

constructive algorithms, data structures, graphs, greedy, implementation, math, two pointers

Diverse Matrix

constructive algorithms, greedy, math, number theory

Beautiful String

constructive algorithms, greedy

Beautiful Sequence

brute force, constructive algorithms, greedy