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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
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shortest paths
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string suffix structures
strings
ternary search
trees
two pointers
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Problems
#
Name
1044B
Intersecting Subtrees
dfs and similar
,
interactive
,
trees
1900
x1256
1141G
Privatization of Roads in Treeland
binary search
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
1900
x1456
982D
Shark
brute force
,
data structures
,
dsu
,
trees
1900
x1756
6E
Exposition
binary search
,
data structures
,
dsu
,
trees
,
two pointers
1900
x1980
109C
Lucky Tree
dp
,
dsu
,
trees
1900
x2039
792D
Paths in a Complete Binary Tree
bitmasks
,
trees
1900
x2211
832D
Misha, Grisha and Underground
dfs and similar
,
graphs
,
trees
1900
x2462
796C
Bank Hacking
constructive algorithms
,
data structures
,
dp
,
trees
1900
x2478
1076E
Vasya and a Tree
data structures
,
trees
1900
x2547
685B
Kay and Snowflake
data structures
,
dfs and similar
,
dp
,
trees
1900
x2557
722D
Generating Sets
binary search
,
data structures
,
dfs and similar
,
greedy
,
strings
,
trees
1900
x2632
500D
New Year Santa Network
combinatorics
,
dfs and similar
,
graphs
,
trees
1900
x2643
14D
Two Paths
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
,
two pointers
1900
x2725
1172B
Nauuo and Circle
combinatorics
,
dfs and similar
,
dp
,
trees
1900
x2872
1092F
Tree with Maximum Cost
dfs and similar
,
dp
,
trees
1900
x3037
472D
Design Tutorial: Inverse the Problem
dfs and similar
,
dsu
,
shortest paths
,
trees
1900
x3140
1153D
Serval and Rooted Tree
binary search
,
dfs and similar
,
dp
,
greedy
,
trees
1900
x3199
739B
Alyona and a tree
binary search
,
data structures
,
dfs and similar
,
graphs
,
trees
1900
x3358
1305D
Kuroni and the Celebration
constructive algorithms
,
dfs and similar
,
interactive
,
trees
1900
x3579
1436D
Bandit in a City
binary search
,
dfs and similar
,
graphs
,
greedy
,
trees
1900
x3776
1245D
Shichikuji and Power Grid
dsu
,
graphs
,
greedy
,
shortest paths
,
trees
1900
x3825
455B
A Lot of Games
dfs and similar
,
dp
,
games
,
implementation
,
strings
,
trees
1900
x3829
191C
Fools and Roads
data structures
,
dfs and similar
,
trees
1900
x4015
1285D
Dr. Evil Underscores
bitmasks
,
brute force
,
dfs and similar
,
divide and conquer
,
dp
,
greedy
,
strings
,
trees
1900
x4908
25D
Roads not only in Berland
dsu
,
graphs
,
trees
1900
x4928
61E
Enemy is weak
data structures
,
trees
1900
x5041
1404B
Tree Tag
dfs and similar
,
dp
,
games
,
trees
1900
x5065
1328E
Tree Queries
dfs and similar
,
graphs
,
trees
1900
x5221
1369D
TediousLee
dp
,
graphs
,
greedy
,
math
,
trees
1900
x6294
638C
Road Improvement
*special problem
,
dfs and similar
,
graphs
,
greedy
,
trees
1800
x995
452B
4-point polyline
brute force
,
constructive algorithms
,
geometry
,
trees
1800
x1810
436C
Dungeons and Candies
dsu
,
graphs
,
greedy
,
trees
1800
x2225
700B
Connecting Universities
dfs and similar
,
dp
,
graphs
,
trees
1800
x2733
827B
High Load
constructive algorithms
,
greedy
,
implementation
,
trees
1800
x2861
675D
Дерево
data structures
,
trees
1800
x2870
1286B
Numbers on Tree
constructive algorithms
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
1800
x3169
923C
Perfect Security
data structures
,
greedy
,
strings
,
trees
1800
x3321
743D
Chloe and pleasant prizes
dfs and similar
,
dp
,
graphs
,
trees
1800
x3336
1083A
The Fair Nut and the Best Path
data structures
,
dp
,
trees
1800
x3445
1118F1
Tree Cutting (Easy Version)
dfs and similar
,
trees
1800
x3485
371D
Vessels
data structures
,
dsu
,
implementation
,
trees
1800
x3522
274B
Zero Tree
dfs and similar
,
dp
,
greedy
,
trees
1800
x3547
1213G
Path Queries
divide and conquer
,
dsu
,
graphs
,
sortings
,
trees
1800
x3571
61D
Eternal Victory
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
trees
1800
x3594
482B
Interesting Array
constructive algorithms
,
data structures
,
trees
1800
x4245
1324F
Maximum White Subtree
dfs and similar
,
dp
,
graphs
,
trees
1800
x4675
1244D
Paint the Tree
brute force
,
constructive algorithms
,
dp
,
graphs
,
implementation
,
trees
1800
x5110
706D
Vasiliy's Multiset
binary search
,
bitmasks
,
data structures
,
trees
1800
x5346
1338B
Edge Weight Assignment
bitmasks
,
constructive algorithms
,
dfs and similar
,
greedy
,
math
,
trees
1800
x6015
1401D
Maximum Distributed Tree
dfs and similar
,
dp
,
greedy
,
implementation
,
math
,
number theory
,
sortings
,
trees
1800
x6018
161D
Distance in Tree
dfs and similar
,
dp
,
trees
1800
x6719
1388C
Uncle Bogdan and Country Happiness
dfs and similar
,
greedy
,
math
,
trees
1800
x6904
290C
WTF?
*special problem
,
graph matchings
,
implementation
,
trees
1700
x1135
193A
Cutting Figure
constructive algorithms
,
graphs
,
trees
1700
x2305
696B
Puzzles
dfs and similar
,
math
,
probabilities
,
trees
1700
x2732
507C
Guess Your Way Out!
implementation
,
math
,
trees
1700
x3477
1085D
Minimum Diameter Tree
constructive algorithms
,
implementation
,
trees
1700
x4222
698B
Fix a Tree
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
trees
1700
x4327
219D
Choosing Capital for Treeland
dfs and similar
,
dp
,
graphs
,
trees
1700
x4742
1176E
Cover it!
dfs and similar
,
dsu
,
graphs
,
shortest paths
,
trees
1700
x5571
1406C
Link Cut Centroids
constructive algorithms
,
dfs and similar
,
graphs
,
trees
1700
x6409
1383A
String Transformation 1
dsu
,
graphs
,
greedy
,
sortings
,
strings
,
trees
,
two pointers
1700
x7617
1037D
Valid BFS?
dfs and similar
,
graphs
,
shortest paths
,
trees
1700
x7883
339D
Xenia and Bit Operations
data structures
,
trees
1700
x13086
1056D
Decorate Apple Tree
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
sortings
,
trees
1600
x3724
979C
Kuro and Walking Route
dfs and similar
,
trees
1600
x4308
682C
Alyona and the Tree
dfs and similar
,
dp
,
graphs
,
trees
1600
x5185
639B
Bear and Forgotten Tree 3
constructive algorithms
,
graphs
,
trees
1600
x5280
1006E
Military Problem
dfs and similar
,
graphs
,
trees
1600
x5839
1098A
Sum in the tree
constructive algorithms
,
dfs and similar
,
greedy
,
trees
1600
x6003
1188A1
Add on a Tree
trees
1600
x6108
369C
Valera and Elections
dfs and similar
,
graphs
,
trees
1600
x6403
780C
Andryusha and Colored Balloons
dfs and similar
,
graphs
,
greedy
,
trees
1600
x6646
1437D
Minimal Height Tree
graphs
,
greedy
,
shortest paths
,
trees
1600
x7130
763A
Timofey and a tree
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
trees
1600
x7211
1363C
Game On Leaves
games
,
trees
1600
x11458
1336A
Linova and Kingdom
dfs and similar
,
dp
,
greedy
,
sortings
,
trees
1600
x12318
431C
k-Tree
dp
,
implementation
,
trees
1600
x14631
212E
IT Restaurants
dfs and similar
,
dp
,
trees
1500
x1042
690C2
Brain Network (medium)
dfs and similar
,
graphs
,
trees
1500
x2012
901A
Hashing Trees
constructive algorithms
,
trees
1500
x4307
959C
Mahmoud and Ehab and the wrong algorithm
constructive algorithms
,
trees
1500
x4398
501C
Misha and Forest
constructive algorithms
,
data structures
,
greedy
,
sortings
,
trees
1500
x4455
821C
Okabe and Boxes
data structures
,
greedy
,
trees
1500
x4872
930A
Peculiar apple-tree
dfs and similar
,
graphs
,
trees
1500
x4979
696A
Lorenzo Von Matterhorn
brute force
,
data structures
,
implementation
,
trees
1500
x4995
982C
Cut 'em all!
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
1500
x6864
1466D
13th Labour of Heracles
data structures
,
greedy
,
sortings
,
trees
1500
x7562
1139C
Edgy Trees
dfs and similar
,
dsu
,
graphs
,
math
,
trees
1500
x7693
1325C
Ehab and Path-etic MEXs
constructive algorithms
,
dfs and similar
,
greedy
,
trees
1500
x9518
839C
Journey
dfs and similar
,
dp
,
graphs
,
probabilities
,
trees
1500
x9650
580C
Kefa and Park
dfs and similar
,
graphs
,
trees
1500
x19860
802J
Send the Fool Further! (easy)
dfs and similar
,
graphs
,
trees
1400
x1964
120F
Spiders
dp
,
greedy
,
trees
1400
x2562
981C
Useful Decomposition
implementation
,
trees
1400
x3760
1143C
Queen
dfs and similar
,
trees
1400
x6757
886C
Petya and Catacombs
dsu
,
greedy
,
implementation
,
trees
1300
x4674
429A
Xor-tree
dfs and similar
,
trees
1300
x6733
755C
PolandBall and Forest
dfs and similar
,
dsu
,
graphs
,
interactive
,
trees
1300
x7031
862B
Mahmoud and Ehab and the bipartiteness
dfs and similar
,
graphs
,
trees
1300
x8705
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