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

XOR Inverse

bitmasks
divide and conquer
strings
trees

yesterday

Graph and Queries

data structures
dsu
trees

Sept. 12, 2020

Link Cut Centroids

dfs and similar
graphs
constructive algorithms
trees

Sept. 6, 2020

Tree Tag

dfs and similar
dp
games
trees

Sept. 6, 2020

Tree Tag

dfs and similar
dp
games
trees
constructive algorithms
strings

Aug. 30, 2020

Distance Matching

constructive algorithms
dfs and similar
trees

Aug. 28, 2020

Spring cleaning

*special
data structures
dfs and similar
graphs
trees

Aug. 26, 2020

Star Trek

*special
combinatorics
dfs and similar
dp
games
graphs
trees
matrices

Aug. 21, 2020

Maximum Distributed Tree

greedy
number theory
sortings
trees
dfs and similar
dp
implementation
math

Aug. 16, 2020

Circumference of a Tree

dfs and similar
trees

Aug. 16, 2020

Dynamic Diameter

dfs and similar
trees

Aug. 16, 2020

Sloth Naptime

trees

Aug. 16, 2020

Cycle Free Flow

trees

Aug. 16, 2020

Filthy Rich Trees

trees

Aug. 16, 2020

The Lorax

trees

Aug. 12, 2020

Boboniu and Jianghu

dp
sortings
trees
greedy

Aug. 9, 2020

Pairs of Pairs

constructive algorithms
dfs and similar
graphs
trees
greedy

Aug. 5, 2020

Weights Division (easy version)

dfs and similar
greedy
trees
data structures

Aug. 5, 2020

Weights Division (hard version)

dfs and similar
greedy
trees
two pointers
binary search
sortings

July 30, 2020

Uncle Bogdan and Country Happiness

trees
greedy
dfs and similar
math

July 30, 2020

Captain Flint and Treasure

graphs
greedy
dfs and similar
trees
implementation
data structures

July 29, 2020

Directing Edges

graphs
trees
dfs and similar
dp

July 24, 2020

String Transformation 1

graphs
trees
greedy
dsu
sortings
strings
two pointers

July 24, 2020

String Transformation 2

dp
graphs
trees
bitmasks

July 24, 2020

String Transformation 1

graphs
trees
dfs and similar
dsu
sortings
greedy

July 24, 2020

String Transformation 2

dp
graphs
trees
bitmasks

July 23, 2020

Village (Minimum)

*special
greedy
dp
trees

July 23, 2020

Village (Maximum)

*special
dfs and similar
trees

July 21, 2020

The Majestic Brown Tree Snake

dp
greedy
trees
dfs and similar
two pointers

July 19, 2020

Inverse Genealogy

constructive algorithms
dp
math
trees
divide and conquer

July 17, 2020

Removing Leaves

greedy
implementation
trees
data structures

July 12, 2020

E. Merging Towers

data structures
dsu
implementation
trees

July 4, 2020

G. Tree Modification

trees
dfs and similar
constructive algorithms
brute force
graphs
graph matchings

June 23, 2020

D. TediousLee

dp
graphs
greedy
math
matrices
trees

June 20, 2020

F1. The Hidden Pair (Easy Version)

interactive
shortest paths
trees
dfs and similar

June 20, 2020

F2. The Hidden Pair (Hard Version)

interactive
shortest paths
trees
dfs and similar

June 18, 2020

G. Shifting Dominoes

geometry
trees

June 14, 2020

G. Secret Society and a Certain Someone

trees

June 13, 2020

D. Ehab's Last Corollary

trees

June 4, 2020

D. Johnny and James

trees

June 4, 2020

E. James and the Chase

probabilities
trees

May 16, 2020

C. Начинающий маг

trees

May 6, 2020

E. Train Tracks

trees

April 23, 2020

D. Nastya and Time Machine

trees

April 15, 2020

A. Linova and Kingdom

trees

April 15, 2020

F. Journey

divide and conquer
trees

April 15, 2020

C. Linova and Kingdom

trees

April 12, 2020

B. Edge Weight Assignment

bitmasks
trees

more
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