Exchange

brute force, math

Long Legs

brute force, math

Remove Adjacent

brute force, constructive algorithms, greedy, strings

Classroom Watch

brute force, math

Tokitsukaze and Mahjong

brute force, implementation

Bear and Prime Numbers

binary search, brute force, data structures, dp, implementation, math, number theory

The Artful Expedient

brute force, implementation

Watering an Array

brute force, greedy, implementation, math

Crossword solving

brute force, implementation, strings

Required Length

brute force, dfs and similar, dp, hashing, shortest paths

Proper Nutrition

brute force, implementation, number theory

Playlist

brute force, data structures, sortings

Segment Occurrences

brute force, implementation

Welfare State

binary search, brute force, data structures, sortings

Colorful Graph

brute force, dfs and similar, graphs

Hyperset

brute force, data structures, implementation

Planar Reflections

brute force, data structures, dp

Generate Login

brute force, greedy, sortings

Ceil Divisions

brute force, constructive algorithms, math, number theory

Fixed Points

brute force, implementation, math

Vasya and Multisets

brute force, dp, greedy, implementation, math

Interview

brute force, implementation

Caisa and Sugar

brute force, implementation

Basic Diplomacy

brute force, constructive algorithms, greedy, implementation

Antipalindrome

brute force, implementation, strings

Arpa’s obvious problem and Mehrdad’s terrible solution

brute force, math, number theory

Row

brute force, constructive algorithms

Thor

brute force, data structures, implementation

Little Elephant and Chess

brute force, strings

Even Subarrays

bitmasks, brute force, hashing, math, number theory

Hacking Cypher

brute force, math, number theory, strings

Divide and Summarize

binary search, brute force, data structures, divide and conquer, implementation, sortings

Mountain Scenery

brute force, constructive algorithms, implementation

Karen and Morning

brute force, implementation

Modulo Equality

brute force, sortings

Permutation Game

brute force, dfs and similar, games, graphs, math

Eat the Chip

brute force, games, greedy, math

Polycarp and Letters

brute force, implementation, strings

Beautiful Numbers

brute force, combinatorics

Seat Arrangements

brute force, implementation

Dima and Lisa

brute force, math, number theory

Alyona and copybooks

brute force, implementation

Economy Game

brute force

Good Triples

brute force, combinatorics, number theory

Run For Your Prize

brute force, greedy

Replace by MEX

brute force, constructive algorithms, sortings

Optimal Currency Exchange

brute force, math

Polo the Penguin and Segments

brute force, implementation

A + B Strikes Back

*special problem, brute force, constructive algorithms, dsu, implementation

Simple Molecules

brute force, graphs, math

p-binary

bitmasks, brute force, math

Three Integers

brute force, math

Mike and Children

brute force, implementation

Cake Assembly Line

brute force, sortings

Color with Occurrences

brute force, data structures, dp, greedy, strings

Compression and Expansion

brute force, data structures, greedy, implementation, trees

Going Home

brute force, hashing, implementation, math

Book

binary search, brute force, data structures, dp, graphs, implementation, sortings

Running Miles

brute force, dp, greedy

Optimal Point on a Line

brute force, sortings

Art Union

brute force, dp, implementation

Single Wildcard Pattern Matching

brute force, implementation, strings

Bark to Unlock

brute force, implementation, strings

Let's Watch Football

binary search, brute force, math

Jamie and Alarm Snooze

brute force, implementation, math

Ball Game

brute force, implementation

Parallelogram is Back

brute force, constructive algorithms, geometry

Almost Arithmetic Progression

brute force, implementation, math

Two Bases

brute force, implementation

Marvolo Gaunt's Ring

brute force, data structures, dp

Connect

brute force, dfs and similar, dsu

Mind Control

brute force, data structures, implementation

Magic Forest

brute force

Mike and Fun

brute force, dp, greedy, implementation

Mike and strings

brute force, dp, strings

Koxia and Number Theory

brute force, chinese remainder theorem, math, number theory

Balance (Easy version)

brute force, data structures, implementation, number theory

Strongly Connected City

brute force, dfs and similar, graphs, implementation

Reverse Card (Easy Version)

brute force, math, number theory

Convert to Ones

brute force, greedy, implementation, math

Points on the line

brute force, greedy, sortings

Maximum Product Strikes Back

brute force, implementation, math, two pointers

Tokitsukaze and Strange Inequality

brute force, data structures, dp

Tandem Repeats?

brute force, strings, two pointers

Menorah

brute force, graphs, greedy, math

The Best Vacation

binary search, brute force, greedy, implementation, two pointers

Bear and Three Balls

brute force, implementation, sortings

Three Blocks Palindrome (hard version)

brute force, data structures, dp, two pointers

Far Relative’s Problem

brute force

Eevee

brute force, implementation, strings

Case of Fake Numbers

brute force, implementation

Mathematical Problem

brute force, constructive algorithms, geometry, math

k-rounding

brute force, math, number theory

Not Adding

brute force, dp, math, number theory

Common Divisors

brute force, hashing, implementation, math, strings

The Fair Nut and Elevator

brute force, implementation

Short Task

brute force, dp, math, number theory

Pasha and Pixels

brute force

Weakened Common Divisor

brute force, greedy, number theory

Make a Square

brute force, implementation, math