Reducing Delivery Cost

brute force, graphs, shortest paths

Swedish Heroes

brute force, dp, implementation

Hexagons

brute force, constructive algorithms, greedy, implementation, math, shortest paths

ABBB

brute force, data structures, greedy, strings

Number of Apartments

brute force, constructive algorithms, math

Searchlights

binary search, brute force, data structures, dp, implementation, sortings, two pointers

Rock, Paper, Scissors

brute force, constructive algorithms, flows, greedy, math

Sage's Birthday (hard version)

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

Stairs

brute force, constructive algorithms, greedy, implementation, math

Maximum Product

brute force, dp, greedy, implementation, sortings

Big Vova

brute force, greedy, math, number theory

Yet Another Array Restoration

brute force, math, number theory

Minimum Product

brute force, greedy, math

Power Sequence

brute force, math, number theory, sortings

Stoned Game

brute force, constructive algorithms, games, greedy

Mercenaries

bitmasks, brute force, combinatorics, dp, dsu, math, two pointers

x-prime Substrings

brute force, dfs and similar, dp, string suffix structures, strings

Zigzags

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

Binary String Reconstruction

2-sat, brute force, constructive algorithms, greedy

RPG Protagonist

brute force, greedy, math

Boboniu and Bit Operations

bitmasks, brute force, dp, greedy

Boboniu Likes to Color Balls

brute force, math

Boboniu Walks on Graph

brute force, dfs and similar, graphs, hashing

505

bitmasks, brute force, constructive algorithms, dp, greedy, implementation

Fix You

brute force, greedy, implementation

Boats Competition

brute force, greedy, two pointers

Captain Flint and Crew Recruitment

brute force, greedy, math, number theory

Segment Intersections

brute force, greedy, implementation, math

Good String

brute force, dp, greedy, two pointers

Array Walk

brute force, dp, greedy

Koa and the Beach (Easy Version)

brute force, dp, greedy

Rearrange

brute force, constructive algorithms, graphs, greedy, sortings

New Passenger Trams

binary search, brute force, data structures, sortings, two pointers

Choosing flowers

binary search, brute force, data structures, dfs and similar, dp, greedy, sortings, two pointers

Dubious Cyrpto

binary search, brute force, math, number theory

Acacius and String

brute force, implementation, strings

a-Good String

bitmasks, brute force, divide and conquer, dp, implementation

Common Subsequence

brute force

Create The Teams

brute force, dp, greedy, implementation, sortings

Three Indices

brute force, data structures

Omkar and Circle

brute force, dp, games, greedy

Tree Modification

brute force, constructive algorithms, dfs and similar, graph matchings, graphs, trees

Replace by MEX

brute force, constructive algorithms, sortings

Cyclic Shifts Sorting

brute force, constructive algorithms, implementation, sortings

Asterism (Easy Version)

binary search, brute force, combinatorics, math, number theory, sortings

Sum of Digits

brute force, constructive algorithms, dp, greedy

Codeforces Subsequences

brute force, constructive algorithms, greedy, math, strings

C+=

brute force, greedy, implementation, math

Necklace Assembly

brute force, dfs and similar, dp, graphs, greedy, number theory

XXXXX

brute force, data structures, number theory, two pointers

Ehab and Prefix MEXs

brute force, constructive algorithms, greedy

Two Arrays

binary search, brute force, combinatorics, constructive algorithms, dp, two pointers

Maximum Subsequence Value

brute force, constructive algorithms

Johnny and His Hobbies

bitmasks, brute force

Odd Selection

brute force, implementation, math

RC Kaboom Show

binary search, brute force, data structures, geometry, math

New Theatre Square

brute force, dp, greedy, implementation, two pointers

Berland Poker

brute force, greedy, math

The Best Vacation

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

Binary Median

binary search, bitmasks, brute force, constructive algorithms

Spy-string

bitmasks, brute force, constructive algorithms, dp, hashing, strings

Not So Simple Polygon Embedding

binary search, brute force, geometry, math

Sequence with Digits

brute force, implementation, math

Decreasing Heights

brute force, dp

K-periodic Garland

brute force, dp, greedy

Special Elements

brute force, implementation, two pointers

Square?

brute force, implementation, math

Phoenix and Berries

brute force, dp, greedy, math

Make It Ascending

bitmasks, brute force, dp

Card Constructions

binary search, brute force, dp, math

Weights Distributing

brute force, graphs, greedy, shortest paths, sortings

Restore the Permutation by Sorted Segments

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

Constant Palindrome Sum

brute force, data structures, greedy, two pointers

Candies

brute force, math

Nastya and CBS

brute force, data structures, hashing

Nastya and Strange Generator

brute force, data structures, greedy, implementation

Chiori and Doll Picking (hard version)

bitmasks, brute force, combinatorics, math

Chiori and Doll Picking (easy version)

bitmasks, brute force, combinatorics, math

Three Blocks Palindrome (hard version)

brute force, data structures, dp, two pointers

Three Blocks Palindrome (easy version)

binary search, brute force, data structures, dp, two pointers

Substring Search

bitmasks, brute force, fft

Circle of Monsters

brute force, constructive algorithms, greedy, math

Perfect Triples

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

Filling Diamonds

brute force, dp, implementation, math

Road to 1600

brute force, constructive algorithms

Challenges in school №41

brute force, constructive algorithms, games, graphs, greedy, implementation, sortings

Elementary!

brute force, dp, strings

Composite Coloring

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

K-th Beautiful String

binary search, brute force, combinatorics, implementation, math

Infinite Path

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

Princesses and Princes

brute force, graphs, greedy

Wise Men (Easy Version)

bitmasks, brute force, dp, meet-in-the-middle

Ehab's REAL Number Theory Problem

brute force, dfs and similar, graphs, number theory, shortest paths

Yet Another Palindrome Problem

brute force, strings

Even Subset Sum Problem

brute force, dp, greedy, implementation

String Modification

brute force, constructive algorithms, implementation, sortings, strings

Kuroni and Antihype

bitmasks, brute force, dp, dsu, graphs

Kuroni and Impossible Calculation

brute force, combinatorics, math, number theory

Kuroni and the Gifts

brute force, constructive algorithms, greedy, sortings

Remove Adjacent

brute force, constructive algorithms, greedy, strings