Magic Stones

constructive algorithms, math, sortings

Sasha and One More Name

constructive algorithms, hashing, strings

Game with modulo

binary search, constructive algorithms, interactive

Nice table

brute force, constructive algorithms, greedy, math

Minimal Diameter Forest

constructive algorithms, dfs and similar, greedy, trees

Similar Arrays

constructive algorithms

Easy Chess

constructive algorithms

Ehab and another another xor problem

bitmasks, constructive algorithms, implementation, interactive

Minimum Diameter Tree

constructive algorithms, implementation, trees

Maximum Diameter Graph

constructive algorithms, graphs, implementation

Missing Numbers

binary search, constructive algorithms, greedy, math, number theory

Olya and magical square

constructive algorithms, implementation, math

Colored Rooks

constructive algorithms, graphs

Dwarves, Hats and Extrasensory Abilities

binary search, constructive algorithms, geometry, interactive

Train Hard, Win Easy

constructive algorithms, greedy, math, sortings

Array Product

constructive algorithms, greedy, math

Tree Reconstruction

constructive algorithms, data structures, graphs, greedy

Little C Loves 3 II

brute force, constructive algorithms, flows, graph matchings

Playing Piano

constructive algorithms, dp

Down or Right

constructive algorithms, interactive, matrices

Array Restoration

constructive algorithms, data structures

Vasya And The Matrix

constructive algorithms, flows, math

Chemical table

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

Relatively Prime Graph

brute force, constructive algorithms, graphs, greedy, math

Tree Constructing

constructive algorithms, graphs

Tesla

constructive algorithms, implementation

Graph And Its Complement

constructive algorithms, graphs, implementation

A Mist of Florescence

constructive algorithms, graphs

Sand Fortress

binary search, constructive algorithms, math

Destruction of a Tree

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

Byteland, Berland and Disputed Cities

constructive algorithms, greedy

Subsequence Counting

bitmasks, constructive algorithms, greedy, implementation

Mahmoud and Ehab and another array construction task

constructive algorithms, greedy, math, number theory

Puzzling Language

constructive algorithms

A Leapfrog in the Array

constructive algorithms, math

Constructing Tests

binary search, brute force, constructive algorithms

Merge Equal Elements

constructive algorithms, data structures

Big Secret

constructive algorithms, math

Stack Sorting

constructive algorithms, data structures, greedy, implementation

Minimum Sum

constructive algorithms, greedy, math

Seating of Students

brute force, constructive algorithms, math

GCD of Polynomials

constructive algorithms, math

Shovel Sale

constructive algorithms, math

Ithea Plays With Chtholly

binary search, constructive algorithms, games, greedy, interactive

Marco and GCD Sequence

constructive algorithms, math

Ralph And His Magic Field

combinatorics, constructive algorithms, math, number theory

Gluttony

constructive algorithms, greedy

Restoration of string

constructive algorithms, graphs, implementation

Road Widening

constructive algorithms, greedy, implementation

Merge Sort

constructive algorithms, divide and conquer

Mahmoud and Ehab and the xor

constructive algorithms

Rooter's Song

constructive algorithms, data structures, geometry, implementation, sortings, two pointers

Dog Show

constructive algorithms, data structures, greedy

Sum of Nestings

constructive algorithms

Leha and another game about graph

constructive algorithms, data structures, dfs and similar, dp, graphs

Jury Marks

brute force, constructive algorithms

High Load

constructive algorithms, greedy, implementation, trees

Karen and Test

brute force, combinatorics, constructive algorithms, math

Vladik and Favorite Game

constructive algorithms, dfs and similar, graphs, interactive

Ice cream coloring

constructive algorithms, dfs and similar, greedy

Maximal GCD

constructive algorithms, greedy, math

Fake News (medium)

constructive algorithms, strings

Police Stations

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

Bank Hacking

constructive algorithms, data structures, dp, trees

Weird journey

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

Underground Lab

constructive algorithms, dfs and similar, graphs

Repairing Of String

*special problem, constructive algorithms

Prairie Partition

binary search, constructive algorithms, greedy, math

Mahmoud and a xor trip

bitmasks, constructive algorithms, data structures, dfs and similar, dp, math, trees

Artsem and Saunders

constructive algorithms, dsu, math

Timofey and rectangles

constructive algorithms, geometry

Dasha and Puzzle

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

Dasha and Very Difficult Problem

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

Ability To Convert

constructive algorithms, dp, greedy, math, strings

Unfair Poll

binary search, constructive algorithms, implementation, math

Pavel and barbecue

constructive algorithms, dfs and similar

Vladik and chat

brute force, constructive algorithms, dp, implementation, strings

Santa Claus and a Palindrome

constructive algorithms, data structures, greedy

New Roads

constructive algorithms, graphs, trees

Alyona and mex

constructive algorithms, greedy

Epidemic in Monstropolis

constructive algorithms, dp, greedy, two pointers

Minimum and Maximum

constructive algorithms, interactive

Subordinates

constructive algorithms, data structures, graphs, greedy, sortings

Sea Battle

constructive algorithms, greedy, math

T-shirts Distribution

constructive algorithms, flows, greedy

One-Way Reform

constructive algorithms, dfs and similar, flows, graphs, greedy

Maxim and Array

constructive algorithms, data structures, greedy, math

Searching Rectangles

binary search, constructive algorithms, interactive

Recover the String

constructive algorithms, greedy, implementation, math

Fix a Tree

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

Gifts by the List

constructive algorithms, dfs and similar, graphs, trees

Money Transfers

constructive algorithms, data structures, greedy, sortings

Simple Subset

constructive algorithms, greedy, number theory

Rebus

constructive algorithms, expression parsing, greedy, math

International Olympiad

constructive algorithms, greedy, implementation, math

Processing Queries

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

Little Artem and Dance

brute force, constructive algorithms, implementation

Graph and String

constructive algorithms, graphs

Optimal Number Permutation

constructive algorithms

Polyline

constructive algorithms, implementation