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CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!)
29:38:13
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Difficulty:
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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
1280D
Miss Punyverse
dp
,
greedy
,
trees
2500
x911
1771F
Hossam and Range Minimum Query
binary search
,
bitmasks
,
data structures
,
hashing
,
probabilities
,
strings
,
trees
2500
x936
1625E1
Cats on the Upgrade (easy version)
brute force
,
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
graphs
,
trees
2500
x969
1332F
Independent Set
dfs and similar
,
dp
,
trees
2500
x971
835F
Roads in the Kingdom
dfs and similar
,
dp
,
graphs
,
trees
2500
x980
1188A2
Add on a Tree: Revolution
constructive algorithms
,
dfs and similar
,
implementation
,
trees
2500
x1065
1623E
Middle Duplication
data structures
,
dfs and similar
,
greedy
,
strings
,
trees
2500
x1069
1146F
Leaf Partition
dp
,
trees
2500
x1082
1065F
Up and Down the Tree
dfs and similar
,
dp
,
trees
2500
x1122
825G
Tree Queries
dfs and similar
,
graphs
,
trees
2500
x1125
1779F
Xorcerer's Stones
bitmasks
,
constructive algorithms
,
dp
,
trees
2500
x1206
1485E
Move and Swap
dfs and similar
,
dp
,
greedy
,
trees
2500
x1207
1842F
Tenzing and Tree
dfs and similar
,
greedy
,
shortest paths
,
sortings
,
trees
2500
x1215
1824C
LuoTianyi and XOR-Tree
data structures
,
dfs and similar
,
dp
,
dsu
,
greedy
,
trees
2500
x1217
1858E1
Rollbacks (Easy Version)
brute force
,
data structures
,
dfs and similar
,
trees
2500
x1227
1120D
Power Tree
dfs and similar
,
dp
,
dsu
,
graphs
,
greedy
,
trees
2500
x1239
804D
Expected diameter of a tree
binary search
,
brute force
,
dfs and similar
,
dp
,
sortings
,
trees
2500
x1248
1467E
Distinctive Roots in a Tree
data structures
,
dfs and similar
,
dp
,
trees
2500
x1320
1508C
Complete the MST
bitmasks
,
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
trees
2500
x1404
1253F
Cheap Robot
binary search
,
dsu
,
graphs
,
shortest paths
,
trees
2500
x1566
1637F
Towers
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
2500
x1669
1521D
Nastia Plays with a Tree
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
dsu
,
greedy
,
implementation
,
trees
2500
x1782
1559D2
Mocha and Diana (Hard Version)
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
trees
,
two pointers
2500
x2506
802L
Send the Fool Further! (hard)
dfs and similar
,
dp
,
math
,
trees
2400
x275
847L
Berland SU Computer Network
constructive algorithms
,
dfs and similar
,
graphs
,
hashing
,
trees
2400
x313
856D
Masha and Cactus
dp
,
trees
2400
x360
1184E3
Daleks' Invasion (hard)
data structures
,
dsu
,
graphs
,
trees
2400
x483
288D
Polo the Penguin and Trees
combinatorics
,
dfs and similar
,
trees
2400
x667
1182D
Complete Mirror
constructive algorithms
,
dfs and similar
,
dp
,
hashing
,
implementation
,
trees
2400
x776
1777F
Comfortably Numb
bitmasks
,
data structures
,
divide and conquer
,
strings
,
trees
2400
x802
1905E
One-X
combinatorics
,
dfs and similar
,
dp
,
math
,
trees
2400
x803
1263F
Economic Difficulties
data structures
,
dfs and similar
,
dp
,
flows
,
graphs
,
trees
2400
x830
581F
Zublicanes and Mumocrates
dp
,
trees
,
two pointers
2400
x835
1902F
Trees and XOR Queries Again
data structures
,
dfs and similar
,
divide and conquer
,
graphs
,
implementation
,
math
,
trees
2400
x852
1098C
Construct a tree
binary search
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2400
x860
1252F
Regular Forestation
hashing
,
trees
2400
x861
990F
Flow Control
dfs and similar
,
dp
,
greedy
,
trees
2400
x866
1032F
Vasya and Maximum Matching
dp
,
trees
2400
x883
1099F
Cookies
binary search
,
data structures
,
dfs and similar
,
dp
,
games
,
trees
2400
x896
1132G
Greedy Subsequences
data structures
,
dp
,
trees
2400
x941
1585E
Frequency Queries
data structures
,
dfs and similar
,
trees
2400
x989
1794E
Labeling the Tree with Distances
data structures
,
dp
,
greedy
,
hashing
,
implementation
,
trees
2400
x991
1004E
Sonya and Ice Cream
binary search
,
data structures
,
dp
,
greedy
,
shortest paths
,
trees
2400
x996
632F
Magic Matrix
brute force
,
divide and conquer
,
graphs
,
matrices
,
trees
2400
x1005
258E
Little Elephant and Tree
data structures
,
dfs and similar
,
trees
2400
x1017
1795F
Blocking Chips
binary search
,
constructive algorithms
,
dfs and similar
,
greedy
,
trees
2400
x1031
1868C
Travel Plan
combinatorics
,
dp
,
implementation
,
math
,
trees
2400
x1050
601D
Acyclic Organic Compounds
data structures
,
dfs and similar
,
dsu
,
hashing
,
strings
,
trees
2400
x1076
1632E1
Distance Tree (easy version)
binary search
,
data structures
,
dfs and similar
,
graphs
,
shortest paths
,
trees
2400
x1097
1738F
Connectivity Addicts
constructive algorithms
,
dsu
,
graphs
,
greedy
,
interactive
,
shortest paths
,
trees
2400
x1135
1879E
Interactive Game with Coloring
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
implementation
,
interactive
,
trees
2400
x1162
593D
Happy Tree Party
data structures
,
dfs and similar
,
graphs
,
math
,
trees
2400
x1167
1042F
Leaf Sets
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
,
trees
2400
x1199
962F
Simple Cycles Edges
dfs and similar
,
graphs
,
trees
2400
x1202
277E
Binary Tree on Plane
flows
,
trees
2400
x1202
1499F
Diameter Cuts
combinatorics
,
dfs and similar
,
dp
,
trees
2400
x1224
1109D
Sasha and Interesting Fact from Graph Theory
brute force
,
combinatorics
,
dp
,
math
,
trees
2400
x1251
1770E
Koxia and Tree
combinatorics
,
dfs and similar
,
dp
,
dsu
,
math
,
probabilities
,
trees
2400
x1283
1370F1
The Hidden Pair (Easy Version)
binary search
,
dfs and similar
,
graphs
,
interactive
,
shortest paths
,
trees
2400
x1327
1059E
Split the Tree
binary search
,
data structures
,
dp
,
greedy
,
trees
2400
x1336
914E
Palindromes in a Tree
bitmasks
,
data structures
,
divide and conquer
,
trees
2400
x1352
1707C
DFS Trees
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
,
trees
2400
x1359
1819C
The Fox and the Complete Tree Traversal
constructive algorithms
,
dp
,
implementation
,
math
,
trees
2400
x1364
653E
Bear and Forgotten Tree 2
dfs and similar
,
dsu
,
graphs
,
trees
2400
x1367
1615E
Purple Crayon
data structures
,
dfs and similar
,
games
,
graphs
,
greedy
,
math
,
sortings
,
trees
2400
x1376
1088E
Ehab and a component choosing problem
dp
,
greedy
,
math
,
trees
2400
x1384
1463E
Plan of Lectures
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
2400
x1424
1174F
Ehab and the Big Finale
constructive algorithms
,
divide and conquer
,
graphs
,
implementation
,
interactive
,
trees
2400
x1426
1633E
Spanning Tree Queries
binary search
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
,
sortings
,
trees
2400
x1453
911F
Tree Destruction
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2400
x1490
916E
Jamie and Tree
data structures
,
trees
2400
x1498
1626E
Black and White Tree
dfs and similar
,
greedy
,
trees
2400
x1501
990G
GCD Counting
divide and conquer
,
dp
,
dsu
,
number theory
,
trees
2400
x1684
1761E
Make It Connected
binary search
,
brute force
,
constructive algorithms
,
dsu
,
graphs
,
greedy
,
matrices
,
trees
,
two pointers
2400
x1700
1720D2
Xor-Subsequence (hard version)
bitmasks
,
data structures
,
dp
,
strings
,
trees
2400
x1708
1527D
MEX Tree
combinatorics
,
dfs and similar
,
implementation
,
math
,
trees
2400
x1808
1408E
Avoid Rainbow Cycles
data structures
,
dsu
,
graphs
,
greedy
,
sortings
,
trees
2400
x1857
1491E
Fib-tree
brute force
,
dfs and similar
,
divide and conquer
,
number theory
,
trees
2400
x2007
379F
New Year Tree
data structures
,
divide and conquer
,
trees
2400
x2093
915F
Imbalance Value of a Tree
data structures
,
dsu
,
graphs
,
trees
2400
x2279
1709E
XOR Tree
bitmasks
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
trees
2400
x2363
815C
Karen and Supermarket
brute force
,
dp
,
trees
2400
x2427
1051F
The Shortest Statement
graphs
,
shortest paths
,
trees
2400
x2619
375D
Tree and Queries
data structures
,
dfs and similar
,
trees
2400
x6066
342E
Xenia and Tree
data structures
,
divide and conquer
,
trees
2400
x7467
1403B
Spring cleaning
*special problem
,
data structures
,
dfs and similar
,
graphs
,
trees
2300
x356
856B
Similar Words
dp
,
hashing
,
strings
,
trees
2300
x474
1252B
Cleaning Robots
dp
,
trees
2300
x500
852I
Dating
brute force
,
dfs and similar
,
graphs
,
trees
2300
x547
1045C
Hyperspace Highways
dfs and similar
,
graphs
,
trees
2300
x611
748F
Santa Clauses and a Soccer Championship
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2300
x629
101D
Castle
dp
,
greedy
,
probabilities
,
sortings
,
trees
2300
x667
414D
Mashmokh and Water Tanks
binary search
,
data structures
,
greedy
,
trees
,
two pointers
2300
x670
1575I
Illusions of the Desert
data structures
,
trees
2300
x827
87D
Beautiful Road
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
2300
x833
846E
Chemistry in Berland
dfs and similar
,
greedy
,
trees
2300
x846
509F
Progress Monitoring
dp
,
trees
2300
x851
935E
Fafa and Ancient Mathematics
dfs and similar
,
dp
,
trees
2300
x859
566A
Matching Names
dfs and similar
,
strings
,
trees
2300
x865
294E
Shaass the Great
dp
,
trees
2300
x883
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