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Codeforces Round 937 (Div. 4)
00:41:55
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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
1868D
Flower-like Pseudotree
constructive algorithms
,
graphs
,
greedy
,
implementation
,
trees
3000
x241
434E
Furukawa Nagisa's Tree
binary search
,
divide and conquer
,
sortings
,
trees
3000
x252
1252D
Find String in a Grid
data structures
,
dp
,
strings
,
trees
3000
x259
1776M
Parmigiana With Seafood
binary search
,
dp
,
greedy
,
trees
3000
x320
1797F
Li Hua and Path
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
trees
3000
x321
1168D
Anagram Paths
dp
,
implementation
,
trees
3000
x331
533A
Berland Miners
binary search
,
data structures
,
dfs and similar
,
greedy
,
trees
3000
x341
1920F2
Smooth Sailing (Hard Version)
binary search
,
data structures
,
dsu
,
geometry
,
graphs
,
trees
3000
x381
1787G
Colorful Tree Again
brute force
,
data structures
,
trees
3000
x389
1299D
Around the World
bitmasks
,
combinatorics
,
dfs and similar
,
dp
,
graphs
,
graphs
,
math
,
trees
3000
x407
1763F
Edge Queries
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
,
trees
3000
x411
1801E
Gasoline prices
data structures
,
divide and conquer
,
dsu
,
hashing
,
trees
3000
x423
1381D
The Majestic Brown Tree Snake
dfs and similar
,
dp
,
greedy
,
trees
,
two pointers
3000
x441
696E
...Wait for it...
data structures
,
dsu
,
trees
3000
x455
1889D
Game of Stacks
brute force
,
dfs and similar
,
graphs
,
implementation
,
trees
3000
x492
1854D
Michael and Hotel
binary search
,
interactive
,
trees
3000
x499
1442E
Black, White and Grey Tree
binary search
,
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
3000
x545
1707D
Partial Virtual Trees
combinatorics
,
dfs and similar
,
dp
,
math
,
trees
3000
x550
1438F
Olha and Igor
interactive
,
probabilities
,
trees
3000
x603
1320E
Treeland and Viruses
data structures
,
dfs and similar
,
dp
,
shortest paths
,
trees
3000
x611
1361E
James and the Chase
dfs and similar
,
graphs
,
probabilities
,
trees
3000
x612
1844G
Tree Weights
bitmasks
,
constructive algorithms
,
data structures
,
dfs and similar
,
implementation
,
math
,
matrices
,
number theory
,
trees
3000
x627
1097G
Vladislav and a Great Legend
combinatorics
,
dp
,
trees
3000
x645
566C
Logistical Questions
dfs and similar
,
divide and conquer
,
trees
3000
x687
150E
Freezing with Style
binary search
,
data structures
,
divide and conquer
,
trees
3000
x770
504E
Misha and LCP on Tree
binary search
,
dfs and similar
,
hashing
,
string suffix structures
,
trees
3000
x849
603E
Pastoral Oddities
data structures
,
divide and conquer
,
dsu
,
math
,
trees
3000
x1143
871E
Restore the Tree
graphs
,
greedy
,
trees
2900
x145
980F
Cactus to Tree
dp
,
graphs
,
trees
2900
x186
403E
Two Rooted Trees
data structures
,
implementation
,
trees
2900
x200
793E
Problem of offices
constructive algorithms
,
dfs and similar
,
dp
,
trees
2900
x238
1361D
Johnny and James
greedy
,
implementation
,
math
,
trees
2900
x303
117E
Tree or not Tree
data structures
,
divide and conquer
,
implementation
,
trees
2900
x303
1654G
Snowy Mountain
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
trees
2900
x349
925E
May Holidays
data structures
,
trees
2900
x349
718D
Andrew and Chemistry
dp
,
hashing
,
trees
2900
x381
997D
Cycles in product
combinatorics
,
divide and conquer
,
trees
2900
x422
226E
Noble Knight's Path
data structures
,
trees
2900
x429
1055F
Tree and XOR
strings
,
trees
2900
x439
1276D
Tree Elimination
dp
,
trees
2900
x475
1528E
Mashtali and Hagh Trees
combinatorics
,
dp
,
trees
2900
x493
763D
Timofey and a flat tree
data structures
,
graphs
,
hashing
,
shortest paths
,
trees
2900
x507
1667D
Edge Elimination
constructive algorithms
,
dfs and similar
,
dp
,
trees
2900
x626
1553H
XOR and Distance
bitmasks
,
divide and conquer
,
trees
2900
x660
343E
Pumping Stations
brute force
,
dfs and similar
,
divide and conquer
,
flows
,
graphs
,
greedy
,
trees
2900
x665
1580D
Subsequence
brute force
,
divide and conquer
,
dp
,
greedy
,
trees
2900
x745
1083C
Max Mex
data structures
,
trees
2900
x834
512D
Fox And Travelling
dp
,
trees
2900
x922
1479D
Odd Mineral Resource
binary search
,
bitmasks
,
brute force
,
data structures
,
probabilities
,
trees
2900
x933
741D
Arpa’s letter-marked tree and Mehrdad’s Dokhtar-kosh paths
data structures
,
dfs and similar
,
trees
2900
x2388
962G
Visible Black Areas
data structures
,
dsu
,
geometry
,
trees
2800
x124
1725I
Imitating the Key Tree
combinatorics
,
dsu
,
trees
2800
x176
1904F
Beautiful Tree
data structures
,
dfs and similar
,
graphs
,
implementation
,
trees
2800
x286
217E
Alien DNA
data structures
,
dsu
,
trees
2800
x288
1633F
Perfect Matching
data structures
,
divide and conquer
,
interactive
,
trees
2800
x300
1935F
Andrey's Tree
binary search
,
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
implementation
,
trees
2800
x312
762F
Tree nesting
combinatorics
,
graphs
,
trees
2800
x344
833D
Red-Black Cobweb
data structures
,
divide and conquer
,
implementation
,
trees
2800
x361
1214H
Tiles Placement
constructive algorithms
,
dfs and similar
,
trees
2800
x367
1389G
Directing Edges
dfs and similar
,
dp
,
graphs
,
trees
2800
x372
1379E
Inverse Genealogy
constructive algorithms
,
divide and conquer
,
dp
,
math
,
trees
2800
x383
842E
Nikita and game
binary search
,
dfs and similar
,
divide and conquer
,
graphs
,
trees
2800
x392
1082F
Speed Dial
dp
,
strings
,
trees
2800
x397
1783G
Weighed Tree Radius
data structures
,
divide and conquer
,
implementation
,
trees
2800
x401
1067E
Random Forest Rank
dp
,
graph matchings
,
math
,
trees
2800
x407
776F
Sherlock's bet to Moriarty
constructive algorithms
,
data structures
,
divide and conquer
,
geometry
,
graphs
,
implementation
,
trees
2800
x407
348E
Pilgrims
dfs and similar
,
dp
,
trees
2800
x425
750F
New Year and Finding Roots
constructive algorithms
,
implementation
,
interactive
,
trees
2800
x460
418D
Big Problems for Organizers
data structures
,
graphs
,
trees
2800
x460
1749F
Distance to the Path
data structures
,
dfs and similar
,
trees
2800
x462
1088F
Ehab and a weird weight formula
data structures
,
trees
2800
x479
1606F
Tree Queries
brute force
,
dp
,
trees
2800
x504
1810F
M-tree
data structures
,
math
,
sortings
,
trees
2800
x520
51F
Caterpillar
dfs and similar
,
dp
,
graphs
,
trees
2800
x539
1830D
Mex Tree
brute force
,
dp
,
trees
2800
x565
1625E2
Cats on the Upgrade (hard version)
binary search
,
data structures
,
dfs and similar
,
graphs
,
trees
2800
x569
1827D
Two Centroids
data structures
,
dfs and similar
,
greedy
,
trees
2800
x682
1413F
Roads and Ramen
data structures
,
trees
2800
x687
620F
Xors on Segments
data structures
,
strings
,
trees
2800
x688
986E
Prince's Problem
brute force
,
data structures
,
math
,
number theory
,
trees
2800
x694
830D
Singer House
combinatorics
,
dp
,
graphs
,
trees
2800
x789
1394D
Boboniu and Jianghu
dp
,
greedy
,
sortings
,
trees
2800
x792
983E
NN country
binary search
,
data structures
,
trees
2800
x863
516D
Drazil and Morning Exercise
dfs and similar
,
dp
,
dsu
,
trees
,
two pointers
2800
x1216
163E
e-Government
data structures
,
dfs and similar
,
dp
,
strings
,
trees
2800
x1491
1039D
You Are Given a Tree
data structures
,
dp
,
trees
2800
x1618
1375G
Tree Modification
brute force
,
constructive algorithms
,
dfs and similar
,
graph matchings
,
graphs
,
trees
2800
x1621
547E
Mike and Friends
data structures
,
string suffix structures
,
strings
,
trees
2800
x1906
555E
Case of Computer Network
dfs and similar
,
graphs
,
trees
2800
x2153
613D
Kingdom and its Cities
dfs and similar
,
divide and conquer
,
dp
,
graphs
,
sortings
,
trees
2800
x2594
690F2
Tree of Life (medium)
constructive algorithms
,
hashing
,
trees
2700
x76
42E
Baldman and the military
dfs and similar
,
graphs
,
trees
2700
x185
48G
Galaxy Union
dp
,
trees
,
two pointers
2700
x246
81E
Pairs
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
trees
2700
x314
812D
Sagheer and Kindergarten
dfs and similar
,
graphs
,
implementation
,
trees
2700
x324
724F
Uniformly Branched Trees
combinatorics
,
dp
,
trees
2700
x385
860E
Arkady and a Nobody-men
data structures
,
dfs and similar
,
trees
2700
x416
1140G
Double Tree
data structures
,
divide and conquer
,
shortest paths
,
trees
2700
x434
868E
Policeman and a Tree
dp
,
graphs
,
trees
2700
x439
1452G
Game On Tree
data structures
,
dfs and similar
,
greedy
,
trees
2700
x447
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