Sum of Substrings

brute force, constructive algorithms, greedy, math, strings

Milica and String

brute force, implementation, strings

Madoka and the Elegant Gift

brute force, constructive algorithms, graphs, implementation

Good Numbers (easy version)

brute force, greedy, implementation

ConneR and the A.R.C. Markland-N

binary search, brute force, implementation

Prison Break

brute force, math

Balls of Steel

brute force, geometry, greedy

Sage's Birthday (hard version)

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

Suits

brute force, greedy, math

MEX and Array

brute force, dp, greedy, math

New Year and Counting Cards

brute force, implementation

Maximum Sum of Products

brute force, dp, implementation, math, two pointers

Arrow Path

brute force, constructive algorithms, dfs and similar, dp, graphs, shortest paths

Trust Nobody

brute force, greedy, implementation, sortings

Monsters (easy version)

brute force, greedy

Lucky Numbers (easy)

binary search, bitmasks, brute force

Grandma Capa Knits a Scarf

brute force, data structures, greedy, strings, two pointers

Bestie

brute force, combinatorics, constructive algorithms, implementation, math, number theory

Make it Increasing

brute force, greedy, math

Power Sequence

brute force, math, number theory, sortings

Triangular numbers

brute force, math

Dasha and Stairs

brute force, constructive algorithms, implementation, math

A Perfectly Balanced String?

brute force, greedy, strings

Sets and Union

bitmasks, brute force, constructive algorithms, greedy

Beru-taxi

brute force, geometry, implementation

Diverse Substrings

brute force, implementation, strings

Pursuit

binary search, brute force, greedy, sortings

Giga Tower

brute force

Ugu

brute force, dp, greedy, implementation

Berland Crossword

bitmasks, brute force, greedy, implementation

Incinerate

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

Bicycle Chain

brute force, implementation

Game on Ranges

brute force, dfs and similar, implementation, sortings

Reverse String

brute force, dp, hashing, implementation, strings

Make It Permutation

brute force, greedy, sortings

Perfect Squares

brute force, implementation, math

Kuroni and the Gifts

brute force, constructive algorithms, greedy, sortings

LR-remainders

brute force, data structures, implementation, math, two pointers

Phone Numbers

brute force

Game with Multiset

binary search, bitmasks, brute force, greedy

Minimum Ties

brute force, constructive algorithms, dfs and similar, graphs, greedy, implementation, math

Little Elephant and Magic Square

brute force, implementation

Permutation Printing

brute force, constructive algorithms, math

Kuroni and Impossible Calculation

brute force, combinatorics, math, number theory

Tear It Apart

brute force, implementation, math, strings

Minimal Cost

brute force, math

Sail

brute force, greedy, implementation

Boboniu and Bit Operations

bitmasks, brute force, dp, greedy

Fraction

brute force, constructive algorithms, math

Protect Sheep

brute force, dfs and similar, graphs, implementation

Increase Subarray Sums

brute force, dp, greedy, implementation

Verse For Santa

binary search, brute force, implementation

Getting Points

binary search, brute force, greedy

Sasha and the Casino

binary search, brute force, constructive algorithms, games, greedy, math

Multiplication Table

binary search, brute force

Maximum Crossings (Easy Version)

brute force

Min Max Sort

binary search, brute force, greedy, math, two pointers

Mocha and Diana (Easy Version)

brute force, constructive algorithms, dsu, graphs, greedy, trees

Going to the Cinema

brute force, greedy, sortings

Factorials and Powers of Two

bitmasks, brute force, constructive algorithms, dp, math

Transformation: from A to B

brute force, dfs and similar, math

Nastya and Strange Generator

brute force, data structures, greedy, implementation

Party

brute force, graphs

Far Relative’s Birthday Cake

brute force, combinatorics, constructive algorithms, implementation

Three displays

brute force, dp, implementation

Help Vasilisa the Wise 2

brute force, math

Mark and His Unfinished Essay

brute force, implementation

Generous Kefa

brute force, implementation

Left and Right Houses

brute force

Buying A House

brute force, implementation

Kyoya and Photobooks

brute force, math, strings

Flipper

brute force, constructive algorithms, greedy

Twist the Permutation

brute force, constructive algorithms, implementation, math

Ehab and Prefix MEXs

brute force, constructive algorithms, greedy

Colour the Flag

brute force, implementation

Division

brute force, math, number theory

Dubious Cyrpto

binary search, brute force, math, number theory

Cobb

bitmasks, brute force, greedy, math

Dorms War

brute force, implementation, strings

Prime Matrix

binary search, brute force, math, number theory

Set or Decrease

binary search, brute force, greedy, sortings

Hexadecimal's Numbers

brute force, implementation, math

Find the Spruce

brute force, dp, implementation

Minimum Grid Path

brute force, data structures, greedy, math

Ebony and Ivory

brute force, math, number theory

Insert and Equalize

brute force, constructive algorithms, greedy, math, number theory

Make It Round

brute force, number theory

Erase and Extend (Easy Version)

binary search, brute force, dp, greedy, hashing, implementation, string suffix structures, strings, two pointers

Strange Test

binary search, bitmasks, brute force, dp, math

Vampiric Powers, anyone?

bitmasks, brute force, dp, greedy

Array Destruction

brute force, constructive algorithms, data structures, greedy, implementation, sortings

Constant Palindrome Sum

brute force, data structures, greedy, two pointers

Unforgivable Curse (easy version)

brute force, constructive algorithms, dsu, graphs, greedy, strings

Little Dima and Equation

brute force, implementation, math, number theory

Constructive Problem

brute force, greedy

Nearly Shortest Repeating Substring

brute force, implementation, number theory, strings

Unforgivable Curse (hard version)

brute force, constructive algorithms, dfs and similar, dsu, graphs, greedy, strings

Column Swapping

brute force, constructive algorithms, greedy, implementation, sortings

Reconnaissance

brute force

Lucky Substring

brute force, implementation