yesterday

kAmazing Numbers

data structures
binary search
implementation
two pointers

yesterday

XOR Inverse

bitmasks
divide and conquer
strings
trees
data structures
greedy

yesterday

Graph and Queries

data structures
dsu
trees
dfs and similar
graphs

yesterday

Split

data structures
dp
greedy

yesterday

kAmazing Numbers

data structures

yesterday

Graph and Queries

data structures
dsu
trees

yesterday

Impressive Harvesting of The Orchard

data structures

Sept. 25, 2020

ESports Tournament

data structures

Sept. 24, 2020

Pokémon Army (hard version)

data structures
dp
greedy
divide and conquer
implementation

Sept. 24, 2020

Rescue Nibel!

data structures
combinatorics
sortings

Sept. 19, 2020

Rain of Fire

binary search
graphs
dsu
dfs and similar
implementation
data structures

Sept. 14, 2020

Trash Problem

data structures
implementation

Sept. 14, 2020

Equal Product

two pointers
data structures
math
number theory

Sept. 14, 2020

Three Occurrences

hashing
two pointers
data structures
probabilities

Sept. 12, 2020

Three Sequences

math
data structures
greedy
constructive algorithms

Sept. 8, 2020

Discrete Centrifugal Jumps

data structures
dp
graphs

Sept. 6, 2020

Fixed Point Removal

data structures
binary search
greedy
two pointers
constructive algorithms

Sept. 6, 2020

Fixed Point Removal

data structures
sortings
binary search

Aug. 30, 2020

Rainbow Rectangles

data structures
two pointers
sortings

Aug. 28, 2020

The Potion of Great Power

*special
binary search
data structures
graphs
interactive
sortings
two pointers
2sat

Aug. 28, 2020

Spring cleaning

*special
data structures
dfs and similar
graphs
trees

Aug. 26, 2020

Fancy Fence

*special
data structures
dsu
math
sortings
implementation

Aug. 25, 2020

Zigzags

two pointers
data structures
math
brute force
combinatorics

Aug. 25, 2020

Clear the Multiset

dp
greedy
divide and conquer
data structures

Aug. 21, 2020

Incredible photography

data structures
dp

Aug. 21, 2020

Java exam

data structures
graphs

Aug. 21, 2020

Divide Square

data structures
geometry
implementation
sortings

Aug. 21, 2020

Reverse and Swap

binary search
bitmasks
data structures

Aug. 16, 2020

Omkar and Landslide

binary search
constructive algorithms
greedy
math
data structures

Aug. 14, 2020

Good Subarrays

data structures
math
dp

Aug. 14, 2020

Two Types of Spells

data structures
greedy
math
binary search
implementation
sortings

Aug. 14, 2020

Controversial Rounds

dp
two pointers
binary search
data structures
greedy

Aug. 7, 2020

Applejack and Storages

data structures
implementation
greedy
constructive algorithms

Aug. 5, 2020

Binary String To Subsequences

greedy
constructive algorithms
data structures
implementation

Aug. 5, 2020

Weights Division (easy version)

dfs and similar
greedy
trees
data structures

Aug. 5, 2020

Yet Another Segments Subset

dp
sortings
data structures
graphs

July 30, 2020

Captain Flint and Treasure

graphs
greedy
dfs and similar
trees
implementation
data structures

July 30, 2020

Uncle Bogdan and Projections

geometry
sortings
data structures

July 29, 2020

Bicolored Segments

data structures
dp
graph matchings
sortings

July 24, 2020

Strange Operation

data structures
dp
combinatorics

July 22, 2020

Mixture

*special
data structures
geometry
math
sortings

July 22, 2020

Joker

*special
bitmasks
data structures
divide and conquer
dsu

July 21, 2020

Prefix Flip (Easy Version)

constructive algorithms
data structures
strings

July 21, 2020

Prefix Flip (Hard Version)

constructive algorithms
data structures
strings
two pointers
implementation

July 21, 2020

Prefix Flip (Easy Version)

constructive algorithms
data structures
strings

July 21, 2020

Prefix Flip (Hard Version)

constructive algorithms
data structures
strings
implementation

July 19, 2020

Choosing flowers

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

July 19, 2020

New Passenger Trams

sortings
brute force
data structures
two pointers
binary search

July 19, 2020

Chess Strikes Back (easy version)

data structures
binary search

July 19, 2020

Chess Strikes Back (hard version)

data structures
divide and conquer

more
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