Dima and Text Messages

brute force, strings

Divisibility by 25

brute force, greedy

Fight the Monster

binary search, brute force, implementation

Jeopardy of Dropped Balls

binary search, brute force, dsu, implementation

Travelling Salesman and Special Numbers

brute force, combinatorics, dp

Balls Game

brute force, two pointers

BerOS File Suggestion

brute force, implementation

Unlucky Numbers

brute force, dp, greedy, implementation

Permutations

brute force

Portal

brute force, data structures, dp, greedy, implementation

Easy As ABC

brute force

Edge Split

brute force, constructive algorithms, dfs and similar, dsu, graphs, probabilities, trees

GCD on a grid

brute force, dfs and similar, dp, implementation, math, number theory

PFAST Inc.

bitmasks, brute force, graphs

MUH and House of Cards

binary search, brute force, greedy, math

T-Shirt Hunt

brute force, implementation

DZY Loves Modification

brute force, data structures, greedy

To Go Or Not To Go?

brute force, dfs and similar, graphs, greedy, implementation, shortest paths

Tell Your World

brute force, geometry

Shopping

brute force

Sum of Progression

brute force, data structures, dp, implementation, math

Good Triple

brute force, two pointers

Shifts

brute force, two pointers

Three Logos

bitmasks, brute force, constructive algorithms, geometry, implementation, math

Two Tables

brute force, implementation

New Problem

brute force, strings

Chess

brute force, implementation, math

Bus Number

brute force, combinatorics, math

Longest Subsequence

brute force, math, number theory

The Beatles

brute force, math

Numerical Sequence (easy version)

binary search, brute force, math

Amity Assessment

brute force, constructive algorithms, implementation

Earn or Unlock

bitmasks, brute force, dp

The Wu

bitmasks, brute force, data structures

Accounting

brute force, math

Image Preview

binary search, brute force, dp, two pointers

Recovering BST

brute force, dp, math, number theory, trees

Predict Outcome of the Game

brute force, implementation, math

Nene and the Mex Operator

bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math

Constructing Tests

binary search, brute force, constructive algorithms

Game of the Rows

brute force, greedy, implementation

Power Transmission (Easy Edition)

brute force, geometry

Permutation Shift

brute force, combinatorics, constructive algorithms, dfs and similar, dsu, graphs, math

Best Pair

binary search, brute force, implementation

Timofey and Black-White Tree

brute force, dfs and similar, divide and conquer, graphs, greedy, math, shortest paths, trees

Reverse Card (Hard Version)

brute force, math, number theory

Four Segments

brute force, constructive algorithms, geometry, implementation, math

Connect the Points

brute force, constructive algorithms, geometry

Infinite Path

brute force, dfs and similar, graphs, math, number theory

Captain Marmot

brute force, geometry

No Palindromes

brute force, constructive algorithms, divide and conquer, greedy, hashing, implementation, math, strings

New Year and Fireworks

brute force, data structures, dfs and similar, dp, implementation

Decreasing Heights

brute force, dp

MEX vs DIFF

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

Doremy's Drying Plan (Easy Version)

brute force, data structures, dp, greedy, sortings

Expand the Path

brute force, combinatorics, data structures, implementation, math

Flag

brute force, combinatorics, dp, implementation

Five Dimensional Points

brute force, geometry, math

Message

brute force

Perfect Triples

bitmasks, brute force, constructive algorithms, divide and conquer, math

Monsters

brute force, data structures, dfs and similar, dsu, graphs, greedy

Vasya and Beautiful Arrays

brute force, dp, number theory

My pretty girl Noora

brute force, dp, greedy, math, number theory

New Year's Puzzle

brute force, dp, graph matchings, greedy, sortings

Nearest Fraction

brute force, implementation, two pointers

Clothes

brute force

Calendar

brute force, implementation

String Manipulation 1.0

*special problem, binary search, brute force, data structures, strings

World of Darkraft: Battle for Azathoth

brute force, data structures, sortings

Number of Triplets

binary search, brute force

Sum Graph

brute force, constructive algorithms, graphs, implementation, interactive, shortest paths, trees

Roman Digits

brute force, combinatorics, dp, greedy, math

Kirk and a Binary String (easy version)

brute force, greedy, strings

Little Artem and Dance

brute force, constructive algorithms, implementation

Solution for Cube

brute force, implementation

Orchestra

brute force, implementation

Chladni Figure

brute force, strings

Boundary

brute force, math

Paired Payment

binary search, brute force, constructive algorithms, dp, flows, graphs, shortest paths

The LCMs Must be Large

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

Encryption (easy)

brute force

Anya and Cubes

binary search, bitmasks, brute force, dp, math, meet-in-the-middle

Video Cards

brute force, data structures, implementation, math, number theory

They Have Fooled

brute force, schedules

Rotate Columns (easy version)

bitmasks, brute force, dp, greedy, sortings

Petr#

brute force, data structures, hashing, strings

Trees and Segments

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

Sum of Digits

brute force, constructive algorithms, dp, greedy

Tree Master

brute force, data structures, dfs and similar, trees

Sereja and Prefixes

binary search, brute force

Jerry's Protest

brute force, combinatorics, dp, probabilities

Clique Partition

brute force, constructive algorithms, graphs, greedy, implementation

Smallest number

brute force

Counting Sticks

brute force, implementation

Minimum Possible LCM

brute force, greedy, math, number theory

Speedrun

brute force, dfs and similar, dp, graphs, greedy, math, sortings, two pointers

Four Segments

brute force, data structures, dp

Land Lot

brute force, implementation

Hossam and (sub-)palindromic tree

brute force, data structures, dfs and similar, dp, strings, trees

Beauty Pageant

brute force, constructive algorithms, greedy