Sept. 19, 2020

Rain of Fire

binary search
graphs
dsu
dfs and similar
implementation
data structures

Sept. 12, 2020

Link Cut Centroids

dfs and similar
graphs
constructive algorithms
trees

Sept. 8, 2020

Egor in the Republic of Dagestan

constructive algorithms
dp
graphs
shortest paths
greedy
dfs and similar

Sept. 6, 2020

Tree Tag

dfs and similar
dp
games
trees

Sept. 6, 2020

Game of Pairs

interactive
math
constructive algorithms
dfs and similar
number theory

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. 25, 2020

xprime Substrings

dp
strings
string suffix structures
brute force
dfs and similar

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

Omkar and Pies

bitmasks
math
dp
dfs and similar
shortest paths

Aug. 12, 2020

Boboniu Walks on Graph

graphs
brute force
hashing
dfs and similar

Aug. 9, 2020

Pairs of Pairs

constructive algorithms
dfs and similar
graphs
trees
greedy

Aug. 7, 2020

Rarity and New Dress

dp
implementation
dfs and similar
shortest paths

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
dfs and similar
dsu
sortings
greedy

July 23, 2020

Graph

*special
dfs and similar
dp
math
binary search
ternary search

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

Choosing flowers

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

July 17, 2020

Directing Edges

dfs and similar
graphs
constructive algorithms

July 17, 2020

Columns Swaps

dfs and similar
graphs
dsu
implementation
2sat

July 4, 2020

G. Tree Modification

trees
dfs and similar
constructive algorithms
brute force
graphs
graph matchings

June 23, 2020

E. DeadLee

data structures
greedy
implementation
sortings
dfs and similar

June 23, 2020

F. BareLee

dp
games
dfs and similar

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

May 17, 2020

E. Graph Coloring

dfs and similar

May 12, 2020

C. Orac and Game of Life

dfs and similar
shortest paths

May 9, 2020

F. Binary String Reconstruction

dfs and similar

May 6, 2020

B. Monopole Magnets

dfs and similar
dsu

May 6, 2020

C. Quantifier Question

dfs and similar

May 1, 2020

F. Phoenix and Memory

dfs and similar

Feb. 29, 2020

F. Riana and Fiber Chatroom

dfs and similar
dsu
sortings

Feb. 4, 2020

F. Berland Beauty

dfs and similar
sortings
trees

Dec. 29, 2019

G. Subset with Zero Sum

dfs and similar

Dec. 7, 2019

H. Hellcife is on fire

dfs and similar

Dec. 7, 2019

J. Jingle Bells

dfs and similar

Nov. 24, 2019

C. Arson In Berland Forest

dfs and similar
shortest paths

Sept. 23, 2019

B. Kamil and Making a Stream

dfs and similar
trees

Aug. 11, 2019

F. Graph Traveler

dfs and similar

July 20, 2019

F1. Short Colorful Strip

combinatorics
dfs and similar

July 20, 2019

G. The Awesomest Vertex

dfs and similar

more
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