Maximum Distributed Tree

dfs and similar, dp, greedy, implementation, math, number theory, sortings, trees

Neverending competitions

implementation, math

Mountain Scenery

brute force, constructive algorithms, implementation

Cd and pwd commands

*special problem, data structures, implementation

Polycarp and Letters

brute force, implementation, strings

The Child and Homework

implementation

Divide and Summarize

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

Karen and Morning

brute force, implementation

Eugeny and Array

implementation

Odds and Ends

implementation

Cinema

implementation, sortings

Joty and Chocolate

implementation, math, number theory

Yet Another Yet Another Task

data structures, dp, implementation, two pointers

Thor

brute force, data structures, implementation

Find The Bone

implementation

Borya's Diagnosis

implementation

Aramic script

implementation, strings

Bear and Elections

greedy, implementation

Elevator or Stairs?

implementation

Replacement

constructive algorithms, data structures, implementation

Sereja and Mugs

implementation

Lever

implementation, math

Robot on the Board 1

implementation

Antipalindrome

brute force, implementation, strings

The Bits

implementation, math

Restore Modulo

implementation, math

Lucky Year

implementation

Infinite Sequence

implementation, math

The Time

implementation

Robot Breakout

implementation

Mahmoud and Ehab and the message

dsu, greedy, implementation

Basic Diplomacy

brute force, constructive algorithms, greedy, implementation

Caisa and Sugar

brute force, implementation

XOR and OR

constructive algorithms, implementation, math

Tokitsukaze and Discard Items

implementation, two pointers

Odd-Even Subsequence

binary search, dp, dsu, greedy, implementation

Interview

brute force, implementation

Vasya and Multisets

brute force, dp, greedy, implementation, math

Fixed Points

brute force, implementation, math

The Child and Set

bitmasks, greedy, implementation, sortings

Saitama Destroys Hotel

implementation, math

Binary Table (Easy Version)

constructive algorithms, implementation

Palindromic Times

implementation, strings

Ela's Fitness and the Luxury Number

binary search, implementation, math

Hyperset

brute force, data structures, implementation

Balloons

constructive algorithms, implementation

Grandfather Dovlet’s calculator

implementation

Close Tuples (hard version)

binary search, combinatorics, implementation, math, sortings, two pointers

Sonya and Exhibition

constructive algorithms, greedy, implementation, math

Anastasia and pebbles

implementation, math

Segment Occurrences

brute force, implementation

Complementary XOR

constructive algorithms, implementation

Chat Servers Outgoing Traffic

implementation

Text Volume

implementation

Proper Nutrition

brute force, implementation, number theory

Vasya and Digital Root

constructive algorithms, implementation

Phone numbers

implementation

Pairs

graphs, implementation

Program

data structures, dp, implementation, strings

RGB Substring (hard version)

data structures, dp, implementation, two pointers

Watering an Array

brute force, greedy, implementation, math

Vasya and Golden Ticket

implementation

Crossword solving

brute force, implementation, strings

Hits Different

data structures, dp, implementation, math

Vanya and Table

implementation, math

DZY Loves Hash

implementation

Face Detection

implementation, strings

Mahmoud and Ehab and the MEX

greedy, implementation

The Artful Expedient

brute force, implementation

Bear and Prime Numbers

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

Books Queries

implementation

Indian Summer

implementation

Postcard

constructive algorithms, implementation

Nick and Array

greedy, implementation

Queries for the Array

data structures, dfs and similar, implementation, strings, trees

Tokitsukaze and Mahjong

brute force, implementation

Regular Bracket Sequence

greedy, implementation

New Year and North Pole

geometry, implementation

Draw!

greedy, implementation

Sanatorium

binary search, constructive algorithms, greedy, implementation, math

Complex Market Analysis

binary search, dp, implementation, number theory, schedules, two pointers

Nezzar and Symmetric Array

implementation, math, sortings

Where is the Pizza?

data structures, dfs and similar, dsu, graphs, implementation, math

Arpa and a research in Mexican wave

implementation, math

George and Sleep

implementation

Comparing Two Long Integers

implementation, strings

Bear and Strings

brute force, greedy, implementation, math, strings

Minimum number of steps

combinatorics, greedy, implementation, math

Painting Pebbles

constructive algorithms, greedy, implementation

Turtle vs. Rabbit Race: Optimal Trainings

binary search, implementation, math, ternary search

Phase Shift

dfs and similar, dsu, graphs, greedy, implementation, strings

Grid game

constructive algorithms, implementation

Memory and Trident

implementation, strings

Line Empire

binary search, brute force, dp, greedy, implementation, math

Exams

implementation, math

Visiting a Friend

greedy, implementation

Card Game

greedy, implementation

New Year and Old Property

bitmasks, brute force, implementation

Zuhair and Strings

brute force, implementation, strings

Vlad and an Odd Ordering

binary search, bitmasks, data structures, dp, implementation, math, number theory