Phone Numbers

constructive algorithms, implementation, strings

Fix a Tree

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

Domino for Young

dp, greedy, math

Diagonal Walking v.2

math

Pōja Verdon

*special problem, implementation, math

Palindromic Matrix

constructive algorithms, implementation

Decorate Apple Tree

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

Salary Changing

binary search, greedy, sortings

Domino Effect

AquaMoon and Chess

combinatorics, math

Set To Max (Easy Version)

brute force, constructive algorithms, greedy

Magic Will Save the World

binary search, bitmasks, brute force, dp

Okabe and Banana Trees

brute force, math

Mishka and trip

implementation, math

Make Palindrome

constructive algorithms, greedy, strings

Years

data structures, sortings

Array Splitting

greedy, sortings

A Lot of Games

dfs and similar, dp, games, implementation, strings, trees

Compressed Bracket Sequence

brute force, implementation

Black Square

implementation

Tree Cutting (Easy Version)

dfs and similar, trees

The Tag Game

dfs and similar, graphs

Tritonic Iridescence

implementation

Bear and String Distance

greedy, strings

Nezzar and Board

constructive algorithms, math, number theory

Lara Croft and the New Game

implementation, math

Marcin and Training Camp

brute force, greedy

Barnicle

brute force, implementation, math, strings

Journey

dp, graphs

2Char

brute force, implementation

Weights Division (easy version)

data structures, dfs and similar, greedy, trees

Mahmoud and Ehab and the wrong algorithm

constructive algorithms, trees

Vasya and Triangle

geometry, number theory

Buns

dp

Plant

math

Searching for Graph

brute force, constructive algorithms, graphs

Triangle

brute force, geometry

Bear and Blocks

binary search, data structures, dp, math

Special Offer! Super Price 999 Bourles!

implementation

Ilya and Sticks

greedy, math, sortings

Xor-Subsequence (easy version)

bitmasks, brute force, dp, strings, trees, two pointers

Petya and Array

data structures, divide and conquer, two pointers

Vasya and the Bus

greedy, math

Modular Stability

combinatorics, math, number theory

AB-string

binary search, combinatorics, dp, strings

New Year Book Reading

constructive algorithms, greedy, implementation, math

Molly's Chemicals

binary search, brute force, data structures, implementation, math

Moscow Gorillas

binary search, dp, greedy, implementation, math, two pointers

Friendly Spiders

dfs and similar, graphs, math, number theory, shortest paths

Months and Years

implementation

Bmail Computer Network

*special problem, dfs and similar, trees

Fruits

greedy, implementation, sortings

Tourist's Notes

binary search, brute force, greedy, implementation, math

Lost Tree

constructive algorithms, interactive, trees

Double Matrix

brute force, greedy

Selling a Menagerie

dfs and similar, dsu, graphs, implementation, math

Planning

greedy

Pasha and Hamsters

constructive algorithms, implementation

Maximize the Intersections

combinatorics, constructive algorithms, geometry, greedy, sortings

Number Of Permutations

combinatorics

Connected Components?

data structures, dfs and similar, dsu, graphs

Magic Grid

constructive algorithms

Prefixes and Suffixes

strings

Monopole Magnets

constructive algorithms, dfs and similar, dsu, graphs

Buying gifts

data structures, greedy, sortings

Book of Evil

dfs and similar, divide and conquer, dp, trees

Unmysterious Language

*special problem, constructive algorithms, strings

Devu and his Brother

binary search, sortings, ternary search, two pointers

Bracket Sequences Concatenation Problem

implementation

Glider

binary search, data structures, two pointers

Navigation System

dfs and similar, graphs, shortest paths

Little Artem and Grasshopper

implementation

Secret Combination

brute force, constructive algorithms, implementation

Not So Simple Polygon Embedding

binary search, brute force, geometry, math

No to Palindromes!

greedy, strings

Slimes

binary search, constructive algorithms, data structures, greedy, two pointers

Heidi Learns Hashing (Easy)

brute force, math, number theory

River Locks

binary search, dp, greedy, math

Bus

greedy, implementation, math

Zero Remainder Sum

dp

Vus the Cossack and Strings

implementation, math

Multiple Testcases

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

Camp Schedule

greedy, hashing, strings

Dasha and Password

brute force, dp, implementation

Code For 1

constructive algorithms, dfs and similar, divide and conquer

Let's Go Hiking

games, greedy

Bandit in a City

binary search, dfs and similar, graphs, greedy, trees

Two Strings Swaps

implementation

Make It Connected

dsu, graphs, greedy

Roads in Berland

graphs, shortest paths

Nearest Opposite Parity

dfs and similar, graphs, shortest paths

Bouncy Ball

brute force, dfs and similar, implementation

Testing Pants for Sadness

greedy, implementation, math

Balanced Removals (Easier)

constructive algorithms, geometry, greedy

Fixed Prefix Permutations

binary search, bitmasks, data structures, hashing, math, sortings

Binary String Sorting

constructive algorithms, greedy

Start Up

implementation

MUH and Important Things

implementation, sortings

Plasticine zebra

constructive algorithms, implementation

Match Points

binary search, greedy, sortings, ternary search, two pointers