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Name
317C
Balance
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2500
x490
916D
Jamie and To-do List
data structures
,
interactive
,
trees
2200
x488
1276D
Tree Elimination
dp
,
trees
2900
x486
696E
...Wait for it...
data structures
,
dsu
,
trees
3000
x485
1260F
Colored Tree
data structures
,
trees
2700
x481
754E
Dasha and cyclic table
bitmasks
,
brute force
,
fft
,
strings
,
trees
2600
x481
757G
Can Bash Save the Day?
data structures
,
divide and conquer
,
graphs
,
trees
3400
x480
70E
Information Reform
dp
,
implementation
,
trees
2700
x478
856B
Similar Words
dp
,
hashing
,
strings
,
trees
2300
x477
855D
Rowena Ravenclaw's Diadem
trees
2500
x475
1749F
Distance to the Path
data structures
,
dfs and similar
,
trees
2800
x472
750F
New Year and Finding Roots
constructive algorithms
,
implementation
,
interactive
,
trees
2800
x471
418D
Big Problems for Organizers
data structures
,
graphs
,
trees
2800
x468
1140G
Double Tree
data structures
,
divide and conquer
,
shortest paths
,
trees
2700
x462
1137F
Matches Are Not a Child's Play
data structures
,
trees
3400
x460
868E
Policeman and a Tree
dp
,
graphs
,
trees
2700
x460
152E
Garden
bitmasks
,
dp
,
graphs
,
trees
2500
x460
1481F
AB Tree
dp
,
greedy
,
trees
3100
x457
1452G
Game On Tree
data structures
,
dfs and similar
,
greedy
,
trees
2700
x454
1381D
The Majestic Brown Tree Snake
dfs and similar
,
dp
,
greedy
,
trees
,
two pointers
3000
x447
1055F
Tree and XOR
strings
,
trees
2900
x447
1662G
Gastronomic Event
dp
,
greedy
,
trees
x445
1517F
Reunion
combinatorics
,
dp
,
trees
3200
x443
758E
Broken Tree
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2600
x443
1482H
Exam
data structures
,
string suffix structures
,
trees
3400
x434
1801E
Gasoline prices
data structures
,
divide and conquer
,
dsu
,
hashing
,
trees
3000
x433
1725E
Electrical Efficiency
combinatorics
,
data structures
,
dp
,
math
,
number theory
,
trees
2500
x433
840E
In a Trap
trees
3200
x433
226E
Noble Knight's Path
data structures
,
trees
2900
x433
348E
Pilgrims
dfs and similar
,
dp
,
trees
2800
x426
997D
Cycles in product
combinatorics
,
divide and conquer
,
trees
2900
x424
1610H
Squid Game
data structures
,
dfs and similar
,
greedy
,
trees
3100
x422
860E
Arkady and a Nobody-men
data structures
,
dfs and similar
,
trees
2700
x422
1067E
Random Forest Rank
dp
,
graph matchings
,
math
,
trees
2800
x421
1763F
Edge Queries
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
,
trees
3000
x419
1299D
Around the World
bitmasks
,
combinatorics
,
dfs and similar
,
dp
,
graphs
,
graphs
,
math
,
trees
3000
x419
1228F
One Node is Gone
constructive algorithms
,
implementation
,
trees
2500
x417
1193B
Magic Tree
*special problem
,
data structures
,
dp
,
trees
x417
776F
Sherlock's bet to Moriarty
constructive algorithms
,
data structures
,
divide and conquer
,
geometry
,
graphs
,
implementation
,
trees
2800
x415
1866K
Keen Tree Calculation
binary search
,
data structures
,
dp
,
geometry
,
graphs
,
implementation
,
trees
2500
x412
1783G
Weighed Tree Radius
data structures
,
divide and conquer
,
implementation
,
trees
2800
x411
1710D
Recover the Tree
constructive algorithms
,
trees
3400
x408
1082F
Speed Dial
dp
,
strings
,
trees
2800
x408
1920F2
Smooth Sailing (Hard Version)
binary search
,
data structures
,
dsu
,
geometry
,
graphs
,
trees
3000
x407
1129E
Legendary Tree
binary search
,
interactive
,
trees
3100
x407
1368G
Shifting Dominoes
data structures
,
geometry
,
graphs
,
trees
3200
x398
1935F
Andrey's Tree
binary search
,
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
implementation
,
trees
2800
x397
842E
Nikita and game
binary search
,
dfs and similar
,
divide and conquer
,
graphs
,
trees
2800
x397
1787G
Colorful Tree Again
brute force
,
data structures
,
trees
3000
x396
639F
Bear and Chemistry
data structures
,
dfs and similar
,
graphs
,
trees
3300
x394
1379E
Inverse Genealogy
constructive algorithms
,
divide and conquer
,
dp
,
math
,
trees
2800
x390
724F
Uniformly Branched Trees
combinatorics
,
dp
,
trees
2700
x390
1648E
Air Reform
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
graphs
,
implementation
,
trees
3200
x384
718D
Andrew and Chemistry
dp
,
hashing
,
trees
2900
x382
1389G
Directing Edges
dfs and similar
,
dp
,
graphs
,
trees
2800
x381
1214H
Tiles Placement
constructive algorithms
,
dfs and similar
,
trees
2800
x374
833D
Red-Black Cobweb
data structures
,
divide and conquer
,
implementation
,
trees
2800
x373
533A
Berland Miners
binary search
,
data structures
,
dfs and similar
,
greedy
,
trees
3000
x373
1859F
Teleportation in Byteland
data structures
,
dfs and similar
,
divide and conquer
,
graphs
,
shortest paths
,
trees
3200
x371
536E
Tavas on the Path
data structures
,
divide and conquer
,
trees
3100
x371
97E
Leaders
dfs and similar
,
dsu
,
graphs
,
trees
2200
x370
856D
Masha and Cactus
dp
,
trees
2400
x369
1774G
Segment Covering
brute force
,
combinatorics
,
constructive algorithms
,
data structures
,
dp
,
trees
3200
x368
1827E
Bus Routes
binary search
,
constructive algorithms
,
dfs and similar
,
greedy
,
trees
3400
x363
925E
May Holidays
data structures
,
trees
2900
x359
1403B
Spring cleaning
*special problem
,
data structures
,
dfs and similar
,
graphs
,
trees
2300
x358
1654G
Snowy Mountain
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
trees
2900
x357
1725J
Journey
dp
,
trees
2500
x356
955F
Heaps
dp
,
trees
2600
x353
1776M
Parmigiana With Seafood
binary search
,
dp
,
greedy
,
trees
3000
x352
1957F1
Frequency Mismatch (Easy Version)
binary search
,
data structures
,
divide and conquer
,
hashing
,
probabilities
,
trees
2600
x347
843C
Upgrading Tree
constructive algorithms
,
dfs and similar
,
graphs
,
math
,
trees
2600
x346
762F
Tree nesting
combinatorics
,
graphs
,
trees
2800
x345
1168D
Anagram Paths
dp
,
implementation
,
trees
3000
x335
1970A2
Balanced Unshuffle (Medium)
brute force
,
constructive algorithms
,
trees
2400
x334
1797F
Li Hua and Path
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
trees
3000
x329
1019E
Raining season
data structures
,
divide and conquer
,
trees
3200
x328
1970G2
Min-Fund Prison (Medium)
brute force
,
dfs and similar
,
dp
,
graphs
,
trees
2200
x327
1970A3
Balanced Unshuffle (Hard)
constructive algorithms
,
trees
2400
x327
1508E
Tree Calendar
brute force
,
constructive algorithms
,
data structures
,
dfs and similar
,
sortings
,
trees
3100
x327
81E
Pairs
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
trees
2700
x327
812D
Sagheer and Kindergarten
dfs and similar
,
graphs
,
implementation
,
trees
2700
x326
1252D
Find String in a Grid
data structures
,
dp
,
strings
,
trees
3000
x325
1396E
Distance Matching
constructive algorithms
,
dfs and similar
,
trees
3200
x321
1045A
Last chance
data structures
,
flows
,
graph matchings
,
graphs
,
trees
2500
x321
1949J
Amanda the Amoeba
graphs
,
implementation
,
trees
,
two pointers
2600
x319
847L
Berland SU Computer Network
constructive algorithms
,
dfs and similar
,
graphs
,
hashing
,
trees
2400
x315
1583H
Omkar and Tours
data structures
,
divide and conquer
,
sortings
,
trees
3300
x314
117E
Tree or not Tree
data structures
,
divide and conquer
,
implementation
,
trees
2900
x311
1904F
Beautiful Tree
data structures
,
dfs and similar
,
graphs
,
implementation
,
trees
2800
x309
1284F
New Year and Social Network
data structures
,
graph matchings
,
graphs
,
math
,
trees
3200
x309
1633F
Perfect Matching
data structures
,
divide and conquer
,
interactive
,
trees
2800
x308
1427F
Boring Card Game
data structures
,
greedy
,
trees
3200
x308
1361D
Johnny and James
greedy
,
implementation
,
math
,
trees
2900
x307
1712F
Triameter
binary search
,
data structures
,
dfs and similar
,
trees
3200
x305
1575E
Eye-Pleasing City Park Tour
data structures
,
trees
2600
x303
217E
Alien DNA
data structures
,
dsu
,
trees
2800
x290
1718D
Permutation for Burenka
data structures
,
graph matchings
,
greedy
,
math
,
trees
3300
x288
822F
Madness
constructive algorithms
,
dfs and similar
,
trees
2500
x288
1957F2
Frequency Mismatch (Hard Version)
binary search
,
data structures
,
dfs and similar
,
hashing
,
probabilities
,
trees
2700
x286
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35:30:12
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