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CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!)
38:34:20
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Difficulty:
—
trees
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
schedules
shortest paths
sortings
string suffix structures
strings
ternary search
trees
two pointers
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Problems
#
Name
1843C
Sum in Binary Tree
bitmasks
,
combinatorics
,
math
,
trees
800
x30451
115A
Party
dfs and similar
,
graphs
,
trees
900
x32374
1057A
Bmail Computer Network
*special problem
,
dfs and similar
,
trees
900
x5688
1511C
Yet Another Card Deck
brute force
,
data structures
,
implementation
,
trees
1100
x21776
1905B
Begginer's Zelda
greedy
,
trees
1100
x14883
1843D
Apple Tree
combinatorics
,
dfs and similar
,
dp
,
math
,
trees
1200
x16675
522A
Reposts
*special problem
,
dfs and similar
,
dp
,
graphs
,
trees
1200
x15566
913B
Christmas Spruce
implementation
,
trees
1200
x15272
1583B
Omkar and Heavenly Tree
constructive algorithms
,
trees
1200
x11871
1857D
Strong Vertices
math
,
sortings
,
trees
1300
x17268
862B
Mahmoud and Ehab and the bipartiteness
dfs and similar
,
graphs
,
trees
1300
x15488
1741D
Masha and a Beautiful Tree
dfs and similar
,
divide and conquer
,
graphs
,
sortings
,
trees
1300
x14188
1676G
White-Black Balanced Subtrees
dfs and similar
,
dp
,
graphs
,
trees
1300
x13721
1675D
Vertical Paths
graphs
,
implementation
,
trees
1300
x12416
755C
PolandBall and Forest
dfs and similar
,
dsu
,
graphs
,
interactive
,
trees
1300
x11293
1900C
Anji's Binary Tree
dfs and similar
,
dp
,
trees
1300
x9980
429A
Xor-tree
dfs and similar
,
trees
1300
x9845
886C
Petya and Catacombs
dsu
,
greedy
,
implementation
,
trees
1300
x5419
1627C
Not Assigning
constructive algorithms
,
dfs and similar
,
number theory
,
trees
1400
x13894
1559D1
Mocha and Diana (Easy Version)
brute force
,
constructive algorithms
,
dsu
,
graphs
,
greedy
,
trees
1400
x13092
1830A
Copil Copac Draws Trees
dfs and similar
,
dp
,
graphs
,
trees
1400
x12135
1143C
Queen
dfs and similar
,
trees
1400
x10988
981C
Useful Decomposition
implementation
,
trees
1400
x5090
802J
Send the Fool Further! (easy)
dfs and similar
,
graphs
,
trees
1400
x3969
120F
Spiders
dp
,
greedy
,
trees
1400
x3480
580C
Kefa and Park
dfs and similar
,
graphs
,
trees
1500
x39142
839C
Journey
dfs and similar
,
dp
,
graphs
,
probabilities
,
trees
1500
x15682
1325C
Ehab and Path-etic MEXs
constructive algorithms
,
dfs and similar
,
greedy
,
trees
1500
x12761
1139C
Edgy Trees
dfs and similar
,
dsu
,
graphs
,
math
,
trees
1500
x11722
1466D
13th Labour of Heracles
data structures
,
greedy
,
sortings
,
trees
1500
x10676
982C
Cut 'em all!
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
1500
x10628
1611D
Weights Assignment For Tree Edges
constructive algorithms
,
trees
1500
x9405
930A
Peculiar apple-tree
dfs and similar
,
graphs
,
trees
1500
x6689
821C
Okabe and Boxes
data structures
,
greedy
,
trees
1500
x6551
696A
Lorenzo Von Matterhorn
brute force
,
data structures
,
implementation
,
trees
1500
x5961
959C
Mahmoud and Ehab and the wrong algorithm
constructive algorithms
,
trees
1500
x5659
501C
Misha and Forest
constructive algorithms
,
data structures
,
greedy
,
sortings
,
trees
1500
x5496
901A
Hashing Trees
constructive algorithms
,
trees
1500
x4992
690C2
Brain Network (medium)
dfs and similar
,
graphs
,
trees
1500
x3535
212E
IT Restaurants
dfs and similar
,
dp
,
trees
1500
x1648
431C
k-Tree
dp
,
implementation
,
trees
1600
x24215
1336A
Linova and Kingdom
dfs and similar
,
dp
,
greedy
,
sortings
,
trees
1600
x19041
1363C
Game On Leaves
games
,
trees
1600
x17672
1528A
Parsa's Humongous Tree
dfs and similar
,
divide and conquer
,
dp
,
greedy
,
trees
1600
x13646
1437D
Minimal Height Tree
graphs
,
greedy
,
shortest paths
,
trees
1600
x12222
1593E
Gardener and Tree
brute force
,
data structures
,
dfs and similar
,
greedy
,
implementation
,
trees
1600
x11474
1689C
Infected Tree
dfs and similar
,
dp
,
trees
1600
x10316
763A
Timofey and a tree
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
trees
1600
x10022
1006E
Military Problem
dfs and similar
,
graphs
,
trees
1600
x9336
369C
Valera and Elections
dfs and similar
,
graphs
,
trees
1600
x9311
1861C
Queries for the Array
data structures
,
dfs and similar
,
implementation
,
strings
,
trees
1600
x9254
780C
Andryusha and Colored Balloons
dfs and similar
,
graphs
,
greedy
,
trees
1600
x8790
1523C
Compression and Expansion
brute force
,
data structures
,
greedy
,
implementation
,
trees
1600
x8549
1098A
Sum in the tree
constructive algorithms
,
dfs and similar
,
greedy
,
trees
1600
x8319
1188A1
Add on a Tree
trees
1600
x8115
1665C
Tree Infection
binary search
,
greedy
,
sortings
,
trees
1600
x7963
1946C
Tree Cutting
binary search
,
dp
,
greedy
,
implementation
,
trees
1600
x7167
682C
Alyona and the Tree
dfs and similar
,
dp
,
graphs
,
trees
1600
x6955
1609D
Social Network
dsu
,
graphs
,
greedy
,
implementation
,
trees
1600
x6844
1899F
Alex's whims
constructive algorithms
,
graphs
,
greedy
,
shortest paths
,
trees
1600
x6412
639B
Bear and Forgotten Tree 3
constructive algorithms
,
graphs
,
trees
1600
x6367
979C
Kuro and Walking Route
dfs and similar
,
trees
1600
x6028
1056D
Decorate Apple Tree
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
sortings
,
trees
1600
x5555
339D
Xenia and Bit Operations
data structures
,
trees
1700
x23303
1037D
Valid BFS?
dfs and similar
,
graphs
,
shortest paths
,
trees
1700
x13589
1176E
Cover it!
dfs and similar
,
dsu
,
graphs
,
shortest paths
,
trees
1700
x10263
1383A
String Transformation 1
dsu
,
graphs
,
greedy
,
sortings
,
strings
,
trees
,
two pointers
1700
x10184
1406C
Link Cut Centroids
constructive algorithms
,
dfs and similar
,
graphs
,
trees
1700
x9737
219D
Choosing Capital for Treeland
dfs and similar
,
dp
,
graphs
,
trees
1700
x8408
1693B
Fake Plastic Trees
dfs and similar
,
dp
,
greedy
,
trees
1700
x7973
1592C
Bakry and Partitioning
bitmasks
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
trees
1700
x7476
1714G
Path Prefixes
binary search
,
data structures
,
dfs and similar
,
trees
1700
x6994
1611E1
Escape The Maze (easy version)
dfs and similar
,
greedy
,
shortest paths
,
trees
,
two pointers
1700
x6804
1873H
Mad City
dfs and similar
,
dsu
,
games
,
graphs
,
shortest paths
,
trees
1700
x6352
1881F
Minimum Maximum Distance
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
1700
x5689
698B
Fix a Tree
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
trees
1700
x5579
1822F
Gardening Friends
brute force
,
dfs and similar
,
dp
,
graphs
,
trees
1700
x5403
1085D
Minimum Diameter Tree
constructive algorithms
,
implementation
,
trees
1700
x5273
507C
Guess Your Way Out!
implementation
,
math
,
trees
1700
x4262
193A
Cutting Figure
constructive algorithms
,
graphs
,
trees
1700
x3725
696B
Puzzles
dfs and similar
,
math
,
probabilities
,
trees
1700
x3369
290C
WTF?
*special problem
,
graph matchings
,
implementation
,
trees
1700
x1506
161D
Distance in Tree
dfs and similar
,
dp
,
trees
1800
x13293
1388C
Uncle Bogdan and Country Happiness
dfs and similar
,
greedy
,
math
,
trees
1800
x9293
706D
Vasiliy's Multiset
binary search
,
bitmasks
,
data structures
,
trees
1800
x9143
1324F
Maximum White Subtree
dfs and similar
,
dp
,
graphs
,
trees
1800
x8861
1401D
Maximum Distributed Tree
dfs and similar
,
dp
,
greedy
,
implementation
,
math
,
number theory
,
sortings
,
trees
1800
x8794
1338B
Edge Weight Assignment
bitmasks
,
constructive algorithms
,
dfs and similar
,
greedy
,
math
,
trees
1800
x7987
1535D
Playoff Tournament
data structures
,
dfs and similar
,
dp
,
implementation
,
trees
1800
x7430
1244D
Paint the Tree
brute force
,
constructive algorithms
,
dp
,
graphs
,
implementation
,
trees
1800
x7171
1213G
Path Queries
divide and conquer
,
dsu
,
graphs
,
sortings
,
trees
1800
x6527
61D
Eternal Victory
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
trees
1800
x6180
482B
Interesting Array
constructive algorithms
,
data structures
,
trees
1800
x6113
1805D
A Wide, Wide Graph
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
1800
x5906
1534D
Lost Tree
constructive algorithms
,
interactive
,
trees
1800
x5711
1720D1
Xor-Subsequence (easy version)
bitmasks
,
brute force
,
dp
,
strings
,
trees
,
two pointers
1800
x5655
1118F1
Tree Cutting (Easy Version)
dfs and similar
,
trees
1800
x5506
371D
Vessels
data structures
,
dsu
,
implementation
,
trees
1800
x5169
1851F
Lisa and the Martians
bitmasks
,
greedy
,
math
,
strings
,
trees
1800
x5141
1083A
The Fair Nut and the Best Path
data structures
,
dp
,
trees
1800
x5114
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