Ceil Divisions

brute force, constructive algorithms, math, number theory

Shinju and the Lost Permutation

constructive algorithms, math

Harmonious Graph

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

MEX and Increments

constructive algorithms, data structures, dp, greedy, implementation, math, sortings

Long Beautiful Integer

constructive algorithms, greedy, implementation, strings

Johnny and Contribution

constructive algorithms, graphs, greedy, sortings

Xenia and Weights

constructive algorithms, dfs and similar, dp, graphs, greedy, shortest paths

Neutral Tonality

constructive algorithms, greedy, sortings, two pointers

Equate Multisets

constructive algorithms, data structures, greedy, math, number theory

Manipulating History

constructive algorithms, greedy, strings

Mathematical Problem

brute force, constructive algorithms, geometry, math

Walk on Matrix

bitmasks, constructive algorithms, math

Array Painting

constructive algorithms, greedy, two pointers

Bakry and Partitioning

bitmasks, constructive algorithms, dfs and similar, dp, graphs, trees

Alyona and mex

constructive algorithms, greedy

GCD Table

constructive algorithms, greedy, number theory

Boris and His Amazing Haircut

constructive algorithms, data structures, dp, dsu, greedy, sortings

RPD and Rap Sheet (Easy Version)

bitmasks, constructive algorithms, interactive, math

The Number of Imposters

constructive algorithms, dfs and similar, dp, dsu, graphs

Singers' Tour

constructive algorithms, math

3-Coloring

constructive algorithms, games, interactive

Domino (easy version)

constructive algorithms, math

Doremy's Connecting Plan

constructive algorithms, greedy, math, sortings

Binary Search

binary search, constructive algorithms, greedy

Chopping Carrots (Easy Version)

binary search, brute force, constructive algorithms, greedy, number theory

Ira and Flamenco

combinatorics, constructive algorithms, data structures, implementation, math, sortings, two pointers

Bitwise Operation Wizard

bitmasks, constructive algorithms, greedy, interactive, math

Different Rules

constructive algorithms, greedy, implementation, math

Candy Party (Easy Version)

bitmasks, constructive algorithms, graphs, greedy, implementation, math

Lexicographically Largest

binary search, constructive algorithms, data structures, greedy, sortings

Matrix Cascade

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

Asya And Kittens

constructive algorithms, dsu

Relatively Prime Graph

brute force, constructive algorithms, graphs, greedy, math

Marina and Vasya

constructive algorithms, greedy, strings

Aroma's Search

brute force, constructive algorithms, geometry, greedy, implementation

Cyclic Rotation

constructive algorithms, greedy, implementation, two pointers

Find a Mine

binary search, constructive algorithms, geometry, greedy, interactive, math

Balanced Removals (Easier)

constructive algorithms, geometry, greedy

Fix a Tree

constructive algorithms, dfs and similar, dsu, graphs, trees

Palindromic Matrix

constructive algorithms, implementation

Minimum Diameter Tree

constructive algorithms, implementation, trees

Messy

constructive algorithms

Crazy Diamond

constructive algorithms, sortings

Feeding Chicken

constructive algorithms, greedy, implementation

Colorful Grid

constructive algorithms

Array Product

constructive algorithms, greedy, math

Jury Marks

brute force, constructive algorithms

Polyline

constructive algorithms, implementation

Array Restoration

constructive algorithms, data structures

Dasha and Very Difficult Problem

binary search, brute force, constructive algorithms, greedy, sortings

Yet Another Ball Problem

constructive algorithms, implementation

Watch the Videos

binary search, constructive algorithms, two pointers

Playing Piano

constructive algorithms, dp

Cutting Figure

constructive algorithms, graphs, trees

Unfair Poll

binary search, constructive algorithms, implementation, math

Subsequence Counting

bitmasks, constructive algorithms, greedy, implementation

Devu and Partitioning of the Array

brute force, constructive algorithms, implementation, number theory

Graph And Its Complement

constructive algorithms, graphs, implementation

A Leapfrog in the Array

constructive algorithms, math

Sea Battle

constructive algorithms, greedy, math

Parity Game

constructive algorithms

Railway System

constructive algorithms, graphs, greedy, interactive, sortings

Three Logos

bitmasks, brute force, constructive algorithms, geometry, implementation, math

Lazy Student

constructive algorithms, data structures, graphs

Constructing Tests

binary search, brute force, constructive algorithms

Train Splitting

constructive algorithms, graphs, greedy

Colored Rooks

constructive algorithms, graphs

Terse princess

constructive algorithms, greedy

Petya and His Friends

constructive algorithms, math, number theory

Four Segments

brute force, constructive algorithms, geometry, implementation, math

Clear Symmetry

constructive algorithms, dp, math

Pavel and barbecue

constructive algorithms, dfs and similar

Balls and Boxes

constructive algorithms, greedy, implementation

Convex Shape

constructive algorithms, implementation

Processing Queries

*special problem, constructive algorithms, data structures, two pointers

Artsem and Saunders

constructive algorithms, dsu, math

Sets

constructive algorithms, hashing, implementation

Easy Chess

constructive algorithms

Discounts

constructive algorithms, greedy, sortings

Tablecity

constructive algorithms, implementation

Minimum Sum

constructive algorithms, greedy, math

Disposition

constructive algorithms, math

Headquarters

constructive algorithms, math

Carousel

constructive algorithms, dp, graphs, greedy, math

Stoned Game

brute force, constructive algorithms, games, greedy

Little Elephant and Array

constructive algorithms, data structures

Diane

constructive algorithms, greedy, strings

Dreamoon Likes Coloring

constructive algorithms, greedy, implementation, math

Extreme Subtraction

constructive algorithms, dp, greedy

Recover an RBS

constructive algorithms, greedy, implementation, strings

Edge Weight Assignment

bitmasks, constructive algorithms, dfs and similar, greedy, math, trees

Task On The Board

constructive algorithms, greedy, implementation, sortings

Paint the Tree

brute force, constructive algorithms, dp, graphs, implementation, trees

Rock, Paper, Scissors

brute force, constructive algorithms, flows, greedy, math

String Coloring (easy version)

constructive algorithms, dp, graphs, greedy, sortings

Messenger in MAC

binary search, brute force, constructive algorithms, data structures, dp, greedy, sortings

Minimum Euler Cycle

constructive algorithms, graphs, greedy, implementation

Primitive Primes

constructive algorithms, math, ternary search

Increasing Subsequences

bitmasks, constructive algorithms, divide and conquer, greedy, math

Zookeeper and The Infinite Zoo

bitmasks, constructive algorithms, dp, greedy, math