Theatre Square

math

String Task

implementation, strings

Young Physicist

implementation, math

Chat room

greedy, strings

Lucky Division

brute force, number theory

Expression

brute force, math

cAPS lOCK

implementation, strings

Dragons

greedy, sortings

Xenia and Ringroad

implementation

Raising Bacteria

bitmasks

Football

strings

New Year Transportation

dfs and similar, graphs, implementation

New Year Candles

implementation

Move Brackets

greedy, strings

Olesya and Rodion

math

Dreamoon and Stairs

implementation, math

Arpa’s hard exam and Mehrdad’s naive cheat

implementation, math, number theory

Road To Zero

greedy, math

Multiplication Table

implementation, number theory

Lecture

implementation, strings

The number of positions

math

Nastia and Nearly Good Numbers

constructive algorithms, math, number theory

K-divisible Sum

binary search, constructive algorithms, greedy, math

Board Moves

math

Jzzhu and Children

implementation

Mahmoud and a Triangle

constructive algorithms, geometry, greedy, math, number theory, sortings

Buttons

implementation, math

Not Adjacent Matrix

constructive algorithms

Lovely Palindromes

constructive algorithms, math

String LCM

brute force, math, number theory, strings

Game 23

implementation, math

Filling Shapes

dp, math

Bad Ugly Numbers

constructive algorithms, number theory

Mahmoud and Longest Uncommon Subsequence

constructive algorithms, strings

Petr and Book

implementation

Berland Poker

brute force, greedy, math

Present from Lena

constructive algorithms, implementation

Payment Without Change

math

Distinct Split

brute force, greedy, strings

New Theatre Square

brute force, dp, greedy, implementation, two pointers

Black and White Stripe

implementation, two pointers

Rudolf and 121

brute force, dp, greedy, math

Different Divisors

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

Regular Bracket Sequence

constructive algorithms, greedy

Make Equal Again

brute force, greedy, math

k-String

implementation, strings

Red and Blue

dp, greedy

Donut Shops

greedy, implementation, math

Free Cash

implementation

Choose the Different Ones!

brute force, greedy, math

Maximum Cost Deletion

greedy, math

Balanced Remainders

brute force, constructive algorithms, math

Life Without Zeros

implementation

Ski Resort

combinatorics, math, two pointers

Bogosort

constructive algorithms, sortings

Sum of Digits

implementation

Jeff and Digits

brute force, implementation, math

Maria Breaks the Self-isolation

greedy, sortings

Olya and Game with Arrays

constructive algorithms, greedy, math, sortings

Traffic Light

binary search, implementation, two pointers

Letters

binary search, implementation, two pointers

Gold Rush

brute force, dfs and similar, dp, implementation

Progressive Square

constructive algorithms, data structures, implementation, sortings

Minimum Extraction

brute force, sortings

Phoenix and Puzzle

brute force, geometry, math, number theory

Little Artem

constructive algorithms

X-Sum

brute force, greedy, implementation

Cormen --- The Best Friend Of a Man

dp, greedy

Save More Mice

binary search, greedy, greedy

Count the Number of Pairs

greedy, strings

Two Divisors

constructive algorithms, math, number theory

Sage's Birthday (easy version)

binary search, constructive algorithms, greedy, sortings

Towers

sortings

Dima and Friends

implementation, math

Double-ended Strings

brute force, implementation, strings

YetnotherrokenKeoard

data structures, implementation, strings

Bear and Finding Criminals

constructive algorithms, implementation

Boboniu Likes to Color Balls

brute force, math

Numbers on Whiteboard

constructive algorithms, data structures, greedy, implementation, math

Raspberries

dp, math

Premutation

brute force, implementation, math

Not a Cheap String

greedy

Valera and X

implementation

Monsters

greedy, math, sortings

Infinite Replacement

combinatorics, implementation, strings

Koxia and Whiteboards

brute force, greedy

Different Differences

constructive algorithms, greedy, math

Supercentral Point

implementation

Johnny and Ancient Computer

implementation

Challenging Valleys

implementation, two pointers

Powering the Hero (easy version)

data structures, greedy

Tiles Comeback

greedy

Assigning to Classes

greedy, implementation, sortings

Swap and Delete

strings

Pasha and Stick

combinatorics, math

Yet Another Permutation Problem

constructive algorithms, greedy, math, number theory

Captain Flint and a Long Voyage

greedy, math

MEXor Mixup

bitmasks, greedy

Deadly Laser

implementation

Buying Torches

math