Max GEQ Sum

binary search, constructive algorithms, data structures, divide and conquer, implementation, two pointers

Shoe Shuffling

constructive algorithms, greedy, implementation, two pointers

Black and White Stripe

implementation, two pointers

Restoring the Duration of Tasks

data structures, greedy, implementation

Array Decrements

greedy, implementation

Lex String

brute force, greedy, implementation, sortings, two pointers

Cute number

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

Linguistics

greedy, implementation, sortings, strings

Column Swapping

brute force, constructive algorithms, greedy, implementation, sortings

Circular Spanning Tree

constructive algorithms, implementation, trees

LIS or Reverse LIS?

constructive algorithms, greedy, implementation, math

Double Sort

implementation, sortings

Card Trick

implementation, math

Robots

implementation

Rooks Defenders

data structures, implementation

Stone Age Problem

data structures, implementation

Tokitsukaze and Good 01-String (hard version)

dp, greedy, implementation

Tokitsukaze and Good 01-String (easy version)

implementation

Tokitsukaze and All Zero Sequence

implementation

Tokitsukaze and Meeting

data structures, implementation, math

Longest Strike

data structures, greedy, implementation, sortings, two pointers

X-Sum

brute force, greedy, implementation

Most Similar Words

brute force, greedy, implementation, implementation, math, strings

Lucky?

implementation

Vertical Paths

graphs, implementation, trees

Detective Task

implementation

Make It Increasing

greedy, implementation

Desktop Rearrangement

data structures, greedy, implementation

A-B-C Sort

constructive algorithms, implementation, sortings

Infinite Replacement

combinatorics, implementation, strings

Cyclic Rotation

constructive algorithms, greedy, implementation, two pointers

Unequal Array

constructive algorithms, greedy, implementation

I love AAAB

constructive algorithms, implementation

Log Chopping

games, implementation, math

String Building

implementation

Very Suspicious

binary search, brute force, geometry, greedy, implementation, math

Where is the Pizza?

data structures, dfs and similar, dsu, graphs, implementation, math

Dorms War

brute force, implementation, strings

Prof. Slim

greedy, implementation, sortings

Fall Down

dfs and similar, implementation

Colorful Stamp

implementation

Odd/Even Increments

greedy, greedy, implementation, math

Triple

implementation, sortings

Division?

implementation

Direction Change

implementation, math

Yin Yang

implementation

Fancy Stack

combinatorics, dp, implementation

MinimizOR

bitmasks, brute force, data structures, divide and conquer, greedy, implementation, two pointers

Are You Safe?

*special problem, implementation

Pōja Verdon

*special problem, implementation, math

Mike's Sequence

*special problem, divide and conquer, implementation, math

Circular Maze

brute force, dfs and similar, graphs, implementation

Ice Cream Shop

brute force, implementation, sortings

Antennas

data structures, dfs and similar, graphs, graphs, implementation, implementation, shortest paths, shortest paths

Evolution of Weasels

greedy, implementation, strings

Organizing SWERC

brute force, implementation

Promising String (hard version)

data structures, implementation, math, strings

Promising String (easy version)

brute force, implementation, math, strings

Matrix and Shifts

brute force, constructive algorithms, greedy, implementation

Maximum Product Strikes Back

brute force, implementation, math, two pointers

Reverse Sort Sum

constructive algorithms, data structures, greedy, implementation, math, two pointers

Line Empire

binary search, brute force, dp, greedy, implementation, math

Red Versus Blue

constructive algorithms, greedy, implementation, math

Gojou and Matrix Game

data structures, dp, games, hashing, implementation, math, number theory, sortings

Marin and Photoshoot

constructive algorithms, implementation, math

Bracket Sequence Deletion

greedy, implementation

Alice and the Cake

data structures, greedy, implementation, sortings

Maximum Cake Tastiness

brute force, greedy, implementation, sortings

Fault-tolerant Network

brute force, data structures, implementation

Playoff

implementation

Vitaly and Advanced Useless Algorithms

dp, greedy, implementation

Rescheduling the Exam

binary search, data structures, greedy, implementation, math, sortings

Twist the Permutation

brute force, constructive algorithms, implementation, math

Weight of the System of Nested Segments

greedy, hashing, implementation, sortings

Deletions of Two Adjacent Letters

implementation, strings

Game of Ball Passing

greedy, implementation

Game

implementation

Air Reform

data structures, dfs and similar, divide and conquer, dsu, graphs, implementation, trees

Serious Business

data structures, divide and conquer, dp, implementation, shortest paths

Tyler and Strings

combinatorics, data structures, implementation

Madoka and the Elegant Gift

brute force, constructive algorithms, graphs, implementation

Madoka and Math Dad

implementation, math

Playing Around the Table

constructive algorithms, greedy, implementation

Weight the Tree

constructive algorithms, dfs and similar, dp, implementation, trees

Expand the Path

brute force, combinatorics, data structures, implementation, math

Cross Coloring

data structures, implementation, math

Increase Subarray Sums

brute force, dp, greedy, implementation

Anti-Fibonacci Permutation

brute force, constructive algorithms, implementation

Doors and Keys

implementation

Repetitions Decoding

constructive algorithms, implementation, sortings

Colorful Operations

brute force, data structures, implementation

Big Brush

constructive algorithms, data structures, greedy, implementation

Best Pair

binary search, brute force, implementation

Andrew and Stones

greedy, implementation

Fibonacci Additions

brute force, data structures, hashing, implementation, math

ABC

implementation

Grid Xor

constructive algorithms, greedy, implementation, interactive, math

Meximum Array

binary search, constructive algorithms, greedy, implementation, math, two pointers

Not Splitting

geometry, graphs, greedy, implementation, shortest paths

Not Escaping

data structures, dp, implementation, shortest paths, two pointers