yesterday

kAmazing Numbers

data structures
binary search
implementation
two pointers

Sept. 19, 2020

Sage's Birthday (hard version)

binary search
sortings
greedy
two pointers
brute force
constructive algorithms

Sept. 14, 2020

Equal Product

two pointers
data structures
math
number theory

Sept. 14, 2020

Three Occurrences

hashing
two pointers
data structures
probabilities

Sept. 8, 2020

Chocolate Bunny

interactive
math
constructive algorithms
two pointers

Sept. 6, 2020

Fixed Point Removal

data structures
binary search
greedy
two pointers
constructive algorithms

Sept. 4, 2020

Two Platforms

two pointers
dp
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. 25, 2020

Zigzags

two pointers
data structures
math
brute force
combinatorics

Aug. 25, 2020

Mercenaries

bitmasks
combinatorics
two pointers
math
brute force
dsu
dp

Aug. 14, 2020

Controversial Rounds

dp
two pointers
binary search
data structures
greedy

Aug. 12, 2020

Boboniu Chats with Du

dp
greedy
two pointers
sortings

Aug. 7, 2020

Twilight and Ancient Scroll (harder version)

dp
implementation
strings
string suffix structures
hashing
two pointers

Aug. 5, 2020

Boats Competition

brute force
two pointers
greedy

Aug. 5, 2020

Weights Division (hard version)

dfs and similar
greedy
trees
two pointers
binary search
sortings

July 29, 2020

Good String

brute force
dp
greedy
two pointers

July 24, 2020

String Transformation 1

graphs
trees
greedy
dsu
sortings
strings
two pointers

July 21, 2020

Prefix Flip (Hard Version)

constructive algorithms
data structures
strings
two pointers
implementation

July 21, 2020

Mastermind

constructive algorithms
greedy
implementation
sortings
graph matchings
two pointers

July 21, 2020

The Majestic Brown Tree Snake

dp
greedy
trees
dfs and similar
two pointers

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 12, 2020

D. Berserk And Fireball

greedy
math
implementation
two pointers
constructive algorithms

July 11, 2020

Omkar and Last Floor

dp
two pointers
greedy

June 28, 2020

D. Zero Remainder Array

math
sortings
two pointers

June 28, 2020

E2. Reading Books (hard version)

greedy
sortings
data structures
two pointers
implementation
ternary search

June 23, 2020

C. RationalLee

greedy
math
sortings
two pointers

June 16, 2020

F1. Flying Sort (Easy Version)

two pointers

June 16, 2020

F2. Flying Sort (Hard Version)

two pointers

June 13, 2020

A. XXXXX

two pointers

June 13, 2020

B. Most sociallydistanced subsequence

two pointers

June 11, 2020

B. Shuffle

two pointers

June 11, 2020

E. Two Arrays

combinatorics
two pointers

May 17, 2020

B. Ternary String

two pointers

May 16, 2020

C. Count Triangles

two pointers

May 9, 2020

E. Special Elements

two pointers

April 26, 2020

D. Multiple Testcases

two pointers

April 21, 2020

C. Alternating Subsequence

two pointers

April 21, 2020

D. Constant Palindrome Sum

two pointers

April 15, 2020

B. Xenia and Colorful Gems

two pointers

April 13, 2020

E1. Three Blocks Palindrome (easy version)

two pointers

April 13, 2020

E2. Three Blocks Palindrome (hard version)

two pointers

April 8, 2020

C. Eugene and an array

two pointers

April 8, 2020

F. Kate and imperfection

two pointers

March 23, 2020

F. AND Segments

bitmasks
combinatorics
two pointers

March 19, 2020

E. Bombs

two pointers

March 12, 2020

D. Pair of Topics

two pointers

March 9, 2020

F. Attack on Red Kingdom

games
two pointers

March 3, 2020

B. Kuroni and Simple Strings

two pointers

more
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