Count Subrectangles

binary search, greedy, implementation

Unusual Competitions

greedy

Remove Adjacent

brute force, constructive algorithms, greedy, strings

Navigation System

dfs and similar, graphs, shortest paths

Journey Planning

data structures, dp, greedy, math, sortings

String Modification

brute force, constructive algorithms, implementation, sortings, strings

Homecoming

binary search, dp, greedy, strings

Skyscrapers (easy version)

brute force, data structures, dp, greedy

Different Rules

constructive algorithms, greedy, implementation, math

Count the Arrays

combinatorics, math

Adding Powers

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

Perform the Combo

brute force

Recommendations

data structures, greedy, sortings

Cow and Message

brute force, dp, math, strings

Cow and Friend

geometry, greedy, math

Kuroni and Impossible Calculation

brute force, combinatorics, math, number theory

Air Conditioner

dp, greedy, implementation, sortings, two pointers

Perfect Keyboard

dfs and similar, greedy, implementation

National Project

math

Ayoub's function

binary search, combinatorics, greedy, math, strings

Motarack's Birthday

binary search, greedy, ternary search

Anu Has a Function

brute force, greedy, math

Fight with Monsters

greedy, sortings

Yet Another Walking Robot

data structures, implementation

Obtain The String

dp, greedy, strings

Infinite Prefixes

math, strings

MEX maximizing

data structures, greedy, implementation, math

Product of Three Numbers

greedy, math, number theory

Aroma's Search

brute force, constructive algorithms, geometry, greedy, implementation

NEKO's Maze Game

data structures, dsu, implementation

Array Sharpening

greedy, implementation

Mind Control

brute force, data structures, implementation

Two Arrays

combinatorics, dp

Hyperset

brute force, data structures, implementation

Fadi and LCM

brute force, math, number theory

Just Eat It!

dp, greedy, implementation

New Year and Permutation

combinatorics, math

New Year and Ascent Sequence

binary search, combinatorics, data structures, dp, implementation, sortings

Friends and Gifts

constructive algorithms, data structures, math

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

Cut and Paste

implementation, math

Santa's Bot

combinatorics, math, probabilities

Stack of Presents

data structures, implementation

Verse For Santa

binary search, brute force, implementation

Berry Jam

data structures, dp, greedy, implementation

A and B

greedy, math

As Simple as One and Two

dp, greedy

Remove One Element

brute force, dp

Shawarma Tent

brute force, geometry, greedy, implementation

Blocks

greedy, math

Make Good

bitmasks, constructive algorithms, math

Modulo Equality

brute force, sortings

Long Beautiful Integer

constructive algorithms, greedy, implementation, strings

Elections

greedy

Diverse Matrix

constructive algorithms, greedy, math, number theory

Beautiful Numbers

data structures, implementation, math, two pointers

Beautiful Regional Contest

greedy, implementation

Secret Passwords

dfs and similar, dsu, graphs

Everyone is a Winner!

binary search, math, meet-in-the-middle, number theory

PIN Codes

greedy, implementation

Infinite Fence

greedy, math, number theory

Obtain Two Zeroes

binary search, math

Yet Another Monster Killing Problem

binary search, data structures, dp, greedy, sortings, two pointers

Binary String Minimizing

greedy

Platforms Jumping

greedy

Minimize the Permutation

greedy

League of Leesins

constructive algorithms, implementation

Feeding Chicken

constructive algorithms, greedy, implementation

Harmonious Graph

constructive algorithms, dfs and similar, dsu, graphs, greedy, sortings

Sweets Eating

dp, greedy, math, sortings

Silly Mistake

greedy, implementation

Even Path

data structures, implementation

Minimize The Integer

greedy, two pointers

Binary Palindromes

greedy, strings

Divide The Students

binary search, greedy, math

Happy Birthday

math

Berstagram

implementation

By Elevator or Stairs?

dp, shortest paths

Good Numbers (hard version)

binary search, greedy, math, meet-in-the-middle

Good Numbers (easy version)

brute force, greedy, implementation

Books Exchange (hard version)

dfs and similar, dsu, math

Constanze's Machine

dp

Character Swap (Hard Version)

strings

Tile Painting

constructive algorithms, math, number theory

Ivan the Fool and the Probability Theory

combinatorics, dp, math

Standard Free2play

dp, greedy, math

Kill `Em All

greedy, sortings

Balanced Removals (Easier)

constructive algorithms, geometry, greedy

Balanced Tunnel

data structures, sortings, two pointers

Labs

constructive algorithms, greedy, implementation

Alice and the List of Presents

combinatorics, math

Distinct Characters Queries

data structures

Pipes

dp, implementation

Social Network (hard version)

data structures, implementation

Primes and Multiplication

math, number theory

Filling the Grid

implementation, math

Optimal Subsequences (Easy Version)

data structures, greedy

Messy

constructive algorithms