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Before contest
Codeforces Round 941 (Div. 1)
19:41:27
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Before contest
Codeforces Round 941 (Div. 2)
19:41:27
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→ Filter Problems
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dfs and similar
combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
constructive algorithms
data structures
dfs and similar
divide and conquer
dp
dsu
expression parsing
fft
flows
games
geometry
graph matchings
graphs
greedy
hashing
implementation
interactive
math
matrices
meet-in-the-middle
number theory
probabilities
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strings
ternary search
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Problems
#
Name
1861C
Queries for the Array
data structures
,
dfs and similar
,
implementation
,
strings
,
trees
1600
x9407
1670C
Where is the Pizza?
data structures
,
dfs and similar
,
dsu
,
graphs
,
implementation
,
math
1400
x9480
1735C
Phase Shift
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
strings
1400
x9542
1406C
Link Cut Centroids
constructive algorithms
,
dfs and similar
,
graphs
,
trees
1700
x9794
429A
Xor-tree
dfs and similar
,
trees
1300
x9975
763A
Timofey and a tree
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
trees
1600
x10080
1833E
Round Dance
dfs and similar
,
dsu
,
graphs
,
shortest paths
1600
x10197
598D
Igor In the Museum
dfs and similar
,
graphs
,
shortest paths
1700
x10314
1900C
Anji's Binary Tree
dfs and similar
,
dp
,
trees
1300
x10348
1176E
Cover it!
dfs and similar
,
dsu
,
graphs
,
shortest paths
,
trees
1700
x10409
902B
Coloring a Tree
dfs and similar
,
dsu
,
greedy
1200
x10449
1689C
Infected Tree
dfs and similar
,
dp
,
trees
1600
x10453
1144F
Graph Without Long Directed Paths
dfs and similar
,
graphs
1700
x10747
982C
Cut 'em all!
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
1500
x10760
441C
Valera and Tubes
constructive algorithms
,
dfs and similar
,
implementation
1500
x10822
1182B
Plus from Picture
dfs and similar
,
implementation
,
strings
1300
x10838
1143C
Queen
dfs and similar
,
trees
1400
x11169
1893A
Anonymous Informant
brute force
,
dfs and similar
,
graphs
,
implementation
1400
x11181
910A
The Way to Home
dfs and similar
,
dp
,
greedy
,
implementation
800
x11356
755C
PolandBall and Forest
dfs and similar
,
dsu
,
graphs
,
interactive
,
trees
1300
x11399
1593E
Gardener and Tree
brute force
,
data structures
,
dfs and similar
,
greedy
,
implementation
,
trees
1600
x11619
129B
Students and Shoelaces
brute force
,
dfs and similar
,
graphs
,
implementation
1200
x11660
1303C
Perfect Keyboard
dfs and similar
,
greedy
,
implementation
1600
x11809
1139C
Edgy Trees
dfs and similar
,
dsu
,
graphs
,
math
,
trees
1500
x11961
1800E2
Unforgivable Curse (hard version)
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
strings
1500
x11985
505B
Mr. Kitayuta's Colorful Graph
dfs and similar
,
dp
,
dsu
,
graphs
1400
x12064
445B
DZY Loves Chemistry
dfs and similar
,
dsu
,
greedy
1400
x12070
1702E
Split Into Two Sets
dfs and similar
,
dsu
,
graphs
1600
x12265
1830A
Copil Copac Draws Trees
dfs and similar
,
dp
,
graphs
,
trees
1400
x12356
600E
Lomsat gelral
data structures
,
dfs and similar
,
dsu
,
trees
2300
x12597
1325C
Ehab and Path-etic MEXs
constructive algorithms
,
dfs and similar
,
greedy
,
trees
1500
x12860
427C
Checkposts
dfs and similar
,
graphs
,
two pointers
1700
x12908
1033A
King Escape
dfs and similar
,
graphs
,
implementation
1000
x12909
1517C
Fillomino 2
constructive algorithms
,
dfs and similar
,
greedy
,
implementation
1400
x13049
727A
Transformation: from A to B
brute force
,
dfs and similar
,
math
1000
x13179
1263D
Secret Passwords
dfs and similar
,
dsu
,
graphs
1500
x13216
948A
Protect Sheep
brute force
,
dfs and similar
,
graphs
,
implementation
900
x13349
510B
Fox And Two Dots
dfs and similar
1500
x13374
161D
Distance in Tree
dfs and similar
,
dp
,
trees
1800
x13516
1487C
Minimum Ties
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
1500
x13663
687A
NP-Hard Problem
dfs and similar
,
graphs
1500
x13730
1037D
Valid BFS?
dfs and similar
,
graphs
,
shortest paths
,
trees
1700
x13759
1528A
Parsa's Humongous Tree
dfs and similar
,
divide and conquer
,
dp
,
greedy
,
trees
1600
x13804
1106D
Lunar New Year and a Wander
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1500
x13883
1623B
Game on Ranges
brute force
,
dfs and similar
,
implementation
,
sortings
1100
x13889
1627C
Not Assigning
constructive algorithms
,
dfs and similar
,
number theory
,
trees
1400
x14011
1948C
Arrow Path
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
shortest paths
1300
x14047
1676G
White-Black Balanced Subtrees
dfs and similar
,
dp
,
graphs
,
trees
1300
x14085
1741D
Masha and a Beautiful Tree
dfs and similar
,
divide and conquer
,
graphs
,
sortings
,
trees
1300
x14403
771A
Bear and Friendship Condition
dfs and similar
,
dsu
,
graphs
1500
x14591
510C
Fox And Names
dfs and similar
,
graphs
,
sortings
1600
x15034
1332C
K-Complete Word
dfs and similar
,
dsu
,
greedy
,
implementation
,
strings
1500
x15571
522A
Reposts
*special problem
,
dfs and similar
,
dp
,
graphs
,
trees
1200
x15691
839C
Journey
dfs and similar
,
dp
,
graphs
,
probabilities
,
trees
1500
x15848
862B
Mahmoud and Ehab and the bipartiteness
dfs and similar
,
graphs
,
trees
1300
x15892
1829F
Forever Winter
dfs and similar
,
graphs
,
math
1300
x16054
1365D
Solve The Maze
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
shortest paths
1700
x16090
1352F
Binary String Reconstruction
constructive algorithms
,
dfs and similar
,
math
1500
x16169
1249B2
Books Exchange (hard version)
dfs and similar
,
dsu
,
math
1300
x16223
1941D
Rudolf and the Ball Game
dfs and similar
,
dp
,
implementation
1200
x16309
1167C
News Distribution
dfs and similar
,
dsu
,
graphs
1400
x16889
1661B
Getting Zero
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
1300
x16932
1843D
Apple Tree
combinatorics
,
dfs and similar
,
dp
,
math
,
trees
1200
x16960
546C
Soldier and Cards
brute force
,
dfs and similar
,
games
1400
x17034
1669G
Fall Down
dfs and similar
,
implementation
1200
x17262
977D
Divide by three, multiply by two
dfs and similar
,
math
,
sortings
1400
x17545
277A
Learning Languages
dfs and similar
,
dsu
1400
x18068
1829E
The Lakes
dfs and similar
,
dsu
,
graphs
,
implementation
1100
x18094
1311B
WeirdSort
dfs and similar
,
sortings
1200
x18469
1490D
Permutation Transformation
dfs and similar
,
divide and conquer
,
implementation
1200
x18761
977E
Cyclic Components
dfs and similar
,
dsu
,
graphs
1500
x19142
1336A
Linova and Kingdom
dfs and similar
,
dp
,
greedy
,
sortings
,
trees
1600
x19254
1020B
Badge
brute force
,
dfs and similar
,
graphs
1000
x20144
217A
Ice Skating
brute force
,
dfs and similar
,
dsu
,
graphs
1200
x20329
377A
Maze
dfs and similar
1600
x21290
893C
Rumor
dfs and similar
,
graphs
,
greedy
1300
x21563
1433D
Districts Connection
constructive algorithms
,
dfs and similar
1200
x21692
1598A
Computer Game
brute force
,
dfs and similar
,
dp
,
implementation
800
x22709
1549B
Gregor and the Pawn Game
dfs and similar
,
dp
,
flows
,
graph matchings
,
graphs
,
greedy
,
implementation
800
x23727
1829D
Gold Rush
brute force
,
dfs and similar
,
dp
,
implementation
1000
x24052
1593B
Make it Divisible by 25
dfs and similar
,
dp
,
greedy
,
math
,
math
900
x25064
1324C
Frog Jumps
binary search
,
data structures
,
dfs and similar
,
greedy
,
implementation
1100
x26839
445A
DZY Loves Chessboard
dfs and similar
,
implementation
1200
x28130
115A
Party
dfs and similar
,
graphs
,
trees
900
x32733
580C
Kefa and Park
dfs and similar
,
graphs
,
trees
1500
x39602
489B
BerSU Ball
dfs and similar
,
dp
,
graph matchings
,
greedy
,
sortings
,
two pointers
1200
x46341
520B
Two Buttons
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
,
shortest paths
1400
x47742
500A
New Year Transportation
dfs and similar
,
graphs
,
implementation
1000
x50080
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