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2023 Post World Finals Online ICPC Challenge powered by Huawei
11 days
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Codeforces Round 944 (Div. 4)
15:01:05
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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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shortest paths
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strings
ternary search
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Problems
#
Name
500A
New Year Transportation
dfs and similar
,
graphs
,
implementation
1000
x50260
520B
Two Buttons
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
,
shortest paths
1400
x47960
489B
BerSU Ball
dfs and similar
,
dp
,
graph matchings
,
greedy
,
sortings
,
two pointers
1200
x46551
580C
Kefa and Park
dfs and similar
,
graphs
,
trees
1500
x39789
115A
Party
dfs and similar
,
graphs
,
trees
900
x32835
445A
DZY Loves Chessboard
dfs and similar
,
implementation
1200
x28239
1324C
Frog Jumps
binary search
,
data structures
,
dfs and similar
,
greedy
,
implementation
1100
x26919
1593B
Make it Divisible by 25
dfs and similar
,
dp
,
greedy
,
math
,
math
900
x25195
1829D
Gold Rush
brute force
,
dfs and similar
,
dp
,
implementation
1000
x24203
1549B
Gregor and the Pawn Game
dfs and similar
,
dp
,
flows
,
graph matchings
,
graphs
,
greedy
,
implementation
800
x23766
1598A
Computer Game
brute force
,
dfs and similar
,
dp
,
implementation
800
x22768
1433D
Districts Connection
constructive algorithms
,
dfs and similar
1200
x21757
893C
Rumor
dfs and similar
,
graphs
,
greedy
1300
x21670
377A
Maze
dfs and similar
1600
x21377
217A
Ice Skating
brute force
,
dfs and similar
,
dsu
,
graphs
1200
x20375
1020B
Badge
brute force
,
dfs and similar
,
graphs
1000
x20198
1336A
Linova and Kingdom
dfs and similar
,
dp
,
greedy
,
sortings
,
trees
1600
x19328
977E
Cyclic Components
dfs and similar
,
dsu
,
graphs
1500
x19247
1490D
Permutation Transformation
dfs and similar
,
divide and conquer
,
implementation
1200
x18833
1311B
WeirdSort
dfs and similar
,
sortings
1200
x18486
1829E
The Lakes
dfs and similar
,
dsu
,
graphs
,
implementation
1100
x18204
277A
Learning Languages
dfs and similar
,
dsu
1400
x18110
977D
Divide by three, multiply by two
dfs and similar
,
math
,
sortings
1400
x17609
1669G
Fall Down
dfs and similar
,
implementation
1200
x17349
546C
Soldier and Cards
brute force
,
dfs and similar
,
games
1400
x17071
1167C
News Distribution
dfs and similar
,
dsu
,
graphs
1400
x17048
1843D
Apple Tree
combinatorics
,
dfs and similar
,
dp
,
math
,
trees
1200
x17035
1661B
Getting Zero
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
1300
x16988
1941D
Rudolf and the Ball Game
dfs and similar
,
dp
,
implementation
1200
x16569
1249B2
Books Exchange (hard version)
dfs and similar
,
dsu
,
math
1300
x16254
1352F
Binary String Reconstruction
constructive algorithms
,
dfs and similar
,
math
1500
x16248
1829F
Forever Winter
dfs and similar
,
graphs
,
math
1300
x16172
1365D
Solve The Maze
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
shortest paths
1700
x16151
862B
Mahmoud and Ehab and the bipartiteness
dfs and similar
,
graphs
,
trees
1300
x15989
839C
Journey
dfs and similar
,
dp
,
graphs
,
probabilities
,
trees
1500
x15902
522A
Reposts
*special problem
,
dfs and similar
,
dp
,
graphs
,
trees
1200
x15714
1332C
K-Complete Word
dfs and similar
,
dsu
,
greedy
,
implementation
,
strings
1500
x15652
510C
Fox And Names
dfs and similar
,
graphs
,
sortings
1600
x15110
771A
Bear and Friendship Condition
dfs and similar
,
dsu
,
graphs
1500
x14634
1741D
Masha and a Beautiful Tree
dfs and similar
,
divide and conquer
,
graphs
,
sortings
,
trees
1300
x14478
1948C
Arrow Path
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
shortest paths
1300
x14382
1676G
White-Black Balanced Subtrees
dfs and similar
,
dp
,
graphs
,
trees
1300
x14200
1627C
Not Assigning
constructive algorithms
,
dfs and similar
,
number theory
,
trees
1400
x14042
1106D
Lunar New Year and a Wander
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1500
x13923
1623B
Game on Ranges
brute force
,
dfs and similar
,
implementation
,
sortings
1100
x13904
1528A
Parsa's Humongous Tree
dfs and similar
,
divide and conquer
,
dp
,
greedy
,
trees
1600
x13877
1037D
Valid BFS?
dfs and similar
,
graphs
,
shortest paths
,
trees
1700
x13847
687A
NP-Hard Problem
dfs and similar
,
graphs
1500
x13774
1487C
Minimum Ties
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
1500
x13696
161D
Distance in Tree
dfs and similar
,
dp
,
trees
1800
x13571
510B
Fox And Two Dots
dfs and similar
1500
x13413
948A
Protect Sheep
brute force
,
dfs and similar
,
graphs
,
implementation
900
x13379
1263D
Secret Passwords
dfs and similar
,
dsu
,
graphs
1500
x13291
727A
Transformation: from A to B
brute force
,
dfs and similar
,
math
1000
x13201
1517C
Fillomino 2
constructive algorithms
,
dfs and similar
,
greedy
,
implementation
1400
x13063
1033A
King Escape
dfs and similar
,
graphs
,
implementation
1000
x12958
1325C
Ehab and Path-etic MEXs
constructive algorithms
,
dfs and similar
,
greedy
,
trees
1500
x12956
427C
Checkposts
dfs and similar
,
graphs
,
two pointers
1700
x12950
600E
Lomsat gelral
data structures
,
dfs and similar
,
dsu
,
trees
2300
x12669
1830A
Copil Copac Draws Trees
dfs and similar
,
dp
,
graphs
,
trees
1400
x12452
1702E
Split Into Two Sets
dfs and similar
,
dsu
,
graphs
1600
x12338
445B
DZY Loves Chemistry
dfs and similar
,
dsu
,
greedy
1400
x12113
505B
Mr. Kitayuta's Colorful Graph
dfs and similar
,
dp
,
dsu
,
graphs
1400
x12090
1800E2
Unforgivable Curse (hard version)
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
strings
1500
x12048
1139C
Edgy Trees
dfs and similar
,
dsu
,
graphs
,
math
,
trees
1500
x12026
1303C
Perfect Keyboard
dfs and similar
,
greedy
,
implementation
1600
x11822
129B
Students and Shoelaces
brute force
,
dfs and similar
,
graphs
,
implementation
1200
x11692
755C
PolandBall and Forest
dfs and similar
,
dsu
,
graphs
,
interactive
,
trees
1300
x11685
1593E
Gardener and Tree
brute force
,
data structures
,
dfs and similar
,
greedy
,
implementation
,
trees
1600
x11672
910A
The Way to Home
dfs and similar
,
dp
,
greedy
,
implementation
800
x11387
1143C
Queen
dfs and similar
,
trees
1400
x11370
1893A
Anonymous Informant
brute force
,
dfs and similar
,
graphs
,
implementation
1400
x11260
1182B
Plus from Picture
dfs and similar
,
implementation
,
strings
1300
x10985
441C
Valera and Tubes
constructive algorithms
,
dfs and similar
,
implementation
1500
x10844
982C
Cut 'em all!
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
1500
x10811
1144F
Graph Without Long Directed Paths
dfs and similar
,
graphs
1700
x10778
598D
Igor In the Museum
dfs and similar
,
graphs
,
shortest paths
1700
x10529
1689C
Infected Tree
dfs and similar
,
dp
,
trees
1600
x10497
902B
Coloring a Tree
dfs and similar
,
dsu
,
greedy
1200
x10473
1176E
Cover it!
dfs and similar
,
dsu
,
graphs
,
shortest paths
,
trees
1700
x10439
1900C
Anji's Binary Tree
dfs and similar
,
dp
,
trees
1300
x10414
1968D
Permutation Game
brute force
,
dfs and similar
,
games
,
graphs
,
greedy
,
math
1300
x10366
1833E
Round Dance
dfs and similar
,
dsu
,
graphs
,
shortest paths
1600
x10299
763A
Timofey and a tree
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
trees
1600
x10110
429A
Xor-tree
dfs and similar
,
trees
1300
x9996
1406C
Link Cut Centroids
constructive algorithms
,
dfs and similar
,
graphs
,
trees
1700
x9821
1735C
Phase Shift
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
strings
1400
x9574
1670C
Where is the Pizza?
data structures
,
dfs and similar
,
dsu
,
graphs
,
implementation
,
math
1400
x9514
1861C
Queries for the Array
data structures
,
dfs and similar
,
implementation
,
strings
,
trees
1600
x9457
1851E
Nastya and Potions
dfs and similar
,
dp
,
graphs
,
sortings
1500
x9441
1006E
Military Problem
dfs and similar
,
graphs
,
trees
1600
x9432
369C
Valera and Elections
dfs and similar
,
graphs
,
trees
1600
x9413
1388C
Uncle Bogdan and Country Happiness
dfs and similar
,
greedy
,
math
,
trees
1800
x9345
919D
Substring
dfs and similar
,
dp
,
graphs
1700
x9324
1681D
Required Length
brute force
,
dfs and similar
,
dp
,
hashing
,
shortest paths
1700
x9268
246D
Colorful Graph
brute force
,
dfs and similar
,
graphs
1600
x9197
1761C
Set Construction
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
1400
x9171
1324F
Maximum White Subtree
dfs and similar
,
dp
,
graphs
,
trees
1800
x9083
920C
Swap Adjacent Elements
dfs and similar
,
greedy
,
math
,
sortings
,
two pointers
1400
x8996
1401D
Maximum Distributed Tree
dfs and similar
,
dp
,
greedy
,
implementation
,
math
,
number theory
,
sortings
,
trees
1800
x8861
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