Noldbach problem

brute force, math, number theory

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

binary search, brute force, implementation

Milica and String

brute force, implementation, strings

Prison Break

brute force, math

Balls of Steel

brute force, geometry, greedy

Suits

brute force, greedy, math

New Year and Counting Cards

brute force, implementation

MEX and Array

brute force, dp, greedy, math

Sage's Birthday (hard version)

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

Maximum Sum of Products

brute force, dp, implementation, math, two pointers

Trust Nobody

brute force, greedy, implementation, sortings

Monsters (easy version)

brute force, greedy

Bestie

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

Lucky Numbers (easy)

binary search, bitmasks, brute force

Power Sequence

brute force, math, number theory, sortings

Dasha and Stairs

brute force, constructive algorithms, implementation, math

Make it Increasing

brute force, greedy, math

Beru-taxi

brute force, geometry, implementation

Pursuit

binary search, brute force, greedy, sortings

Grandma Capa Knits a Scarf

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

A Perfectly Balanced String?

brute force, greedy, strings

Triangular numbers

brute force, math

Sets and Union

bitmasks, brute force, constructive algorithms, greedy

Diverse Substrings

brute force, implementation, strings

Giga Tower

brute force

Ugu

brute force, dp, greedy, implementation

Berland Crossword

bitmasks, brute force, greedy, implementation

Game on Ranges

brute force, dfs and similar, implementation, sortings

Bicycle Chain

brute force, implementation

Incinerate

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

Reverse String

brute force, dp, hashing, implementation, strings

Arrow Path

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

Kuroni and the Gifts

brute force, constructive algorithms, greedy, sortings

Make It Permutation

brute force, greedy, sortings

Perfect Squares

brute force, implementation, math

Phone Numbers

brute force

Little Elephant and Magic Square

brute force, implementation

Minimum Ties

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

Minimal Cost

brute force, math

Tear It Apart

brute force, implementation, math, strings

Sail

brute force, greedy, implementation

Boboniu and Bit Operations

bitmasks, brute force, dp, greedy

Kuroni and Impossible Calculation

brute force, combinatorics, math, number theory

Game with Multiset

binary search, bitmasks, brute force, greedy

Fraction

brute force, constructive algorithms, math

Verse For Santa

binary search, brute force, implementation

Protect Sheep

brute force, dfs and similar, graphs, implementation

Increase Subarray Sums

brute force, dp, greedy, implementation

Permutation Printing

brute force, constructive algorithms, math

LR-remainders

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

Multiplication Table

binary search, brute force

Maximum Crossings (Easy Version)

brute force

Going to the Cinema

brute force, greedy, sortings

Getting Points

binary search, brute force, greedy

Transformation: from A to B

brute force, dfs and similar, math

Mocha and Diana (Easy Version)

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

Nastya and Strange Generator

brute force, data structures, greedy, implementation

Min Max Sort

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

Far Relative’s Birthday Cake

brute force, combinatorics, constructive algorithms, implementation

Party

brute force, graphs

Factorials and Powers of Two

bitmasks, brute force, constructive algorithms, dp, math

Three displays

brute force, dp, implementation

Sasha and the Casino

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

Help Vasilisa the Wise 2

brute force, math

Mark and His Unfinished Essay

brute force, implementation

Generous Kefa

brute force, implementation

Buying A House

brute force, implementation

Kyoya and Photobooks

brute force, math, strings

Ehab and Prefix MEXs

brute force, constructive algorithms, greedy

Twist the Permutation

brute force, constructive algorithms, implementation, math

Flipper

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

Dorms War

brute force, implementation, strings

Cobb

bitmasks, brute force, greedy, math

Find the Spruce

brute force, dp, implementation

Hexadecimal's Numbers

brute force, implementation, math

Prime Matrix

binary search, brute force, math, number theory

Minimum Grid Path

brute force, data structures, greedy, math

Ebony and Ivory

brute force, math, number theory

Set or Decrease

binary search, brute force, greedy, sortings

Strange Test

binary search, bitmasks, brute force, dp, math

Erase and Extend (Easy Version)

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

Constant Palindrome Sum

brute force, data structures, greedy, two pointers

Left and Right Houses

brute force

Array Destruction

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

Vampiric Powers, anyone?

bitmasks, brute force, dp, greedy

Insert and Equalize

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

Little Dima and Equation

brute force, implementation, math, number theory

Unforgivable Curse (easy version)

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

Constructive Problem

brute force, greedy

Column Swapping

brute force, constructive algorithms, greedy, implementation, sortings

Repainting Street

brute force, brute force, greedy

Lucky Substring

brute force, implementation

Unforgivable Curse (hard version)

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

Make It Round

brute force, number theory

Reconnaissance

brute force

Representative Edges

brute force, geometry, implementation, math

George and Round

brute force, greedy, two pointers