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Problems
#
Name
1294F
Three Paths on a Tree
dfs and similar
,
dp
,
greedy
,
trees
2000
x5360
1454E
Number of Simple Paths
combinatorics
,
dfs and similar
,
graphs
,
trees
2000
x5520
1399E1
Weights Division (easy version)
data structures
,
dfs and similar
,
greedy
,
trees
2000
x5692
337D
Book of Evil
dfs and similar
,
divide and conquer
,
dp
,
trees
2000
x5838
383C
Propagating tree
data structures
,
dfs and similar
,
trees
2000
x6124
1388D
Captain Flint and Treasure
data structures
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
trees
2000
x6131
1363E
Tree Shuffling
dfs and similar
,
dp
,
greedy
,
trees
2000
x6495
1970G1
Min-Fund Prison (Easy)
dfs and similar
,
trees
1900
x714
1970C3
Game on Tree (Hard)
dfs and similar
,
dp
,
games
,
trees
1900
x777
928D
Autocompletion
*special problem
,
strings
,
trees
1900
x801
1949C
Annual Ants' Gathering
dfs and similar
,
dp
,
greedy
,
trees
1900
x1249
37C
Old Berland Language
data structures
,
greedy
,
trees
1900
x1511
1044B
Intersecting Subtrees
dfs and similar
,
interactive
,
trees
1900
x1550
1184E1
Daleks' Invasion (easy)
graphs
,
trees
1900
x1559
1141G
Privatization of Roads in Treeland
binary search
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
1900
x2191
982D
Shark
brute force
,
data structures
,
dsu
,
trees
1900
x2247
792D
Paths in a Complete Binary Tree
bitmasks
,
trees
1900
x2905
1899G
Unusual Entertainment
data structures
,
dfs and similar
,
dsu
,
shortest paths
,
sortings
,
trees
,
two pointers
1900
x2920
796C
Bank Hacking
constructive algorithms
,
data structures
,
dp
,
trees
1900
x2979
1926G
Vlad and Trouble at MIT
dfs and similar
,
dp
,
flows
,
graphs
,
greedy
,
implementation
,
trees
1900
x2982
6E
Exposition
binary search
,
data structures
,
dsu
,
trees
,
two pointers
1900
x3007
500D
New Year Santa Network
combinatorics
,
dfs and similar
,
graphs
,
trees
1900
x3066
1714F
Build a Tree and That Is It
constructive algorithms
,
implementation
,
trees
1900
x3084
722D
Generating Sets
binary search
,
data structures
,
dfs and similar
,
greedy
,
strings
,
trees
1900
x3090
109C
Lucky Tree
dp
,
dsu
,
trees
1900
x3194
1777D
Score of a Tree
bitmasks
,
combinatorics
,
dfs and similar
,
dp
,
math
,
probabilities
,
trees
1900
x3231
1774E
Two Chess Pieces
dfs and similar
,
dp
,
greedy
,
trees
1900
x3319
1738D
Permutation Addicts
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
trees
1900
x3332
1076E
Vasya and a Tree
data structures
,
trees
1900
x3616
832D
Misha, Grisha and Underground
dfs and similar
,
graphs
,
trees
1900
x3619
1611E2
Escape The Maze (hard version)
dfs and similar
,
dp
,
greedy
,
shortest paths
,
trees
1900
x3661
1914F
Programming Competition
dfs and similar
,
dp
,
graph matchings
,
greedy
,
trees
1900
x3696
1797D
Li Hua and Tree
brute force
,
data structures
,
dfs and similar
,
dp
,
implementation
,
trees
1900
x3709
1172B
Nauuo and Circle
combinatorics
,
dfs and similar
,
dp
,
trees
1900
x3746
1902E
Collapsing Strings
data structures
,
strings
,
trees
1900
x3785
685B
Kay and Snowflake
data structures
,
dfs and similar
,
dp
,
trees
1900
x3790
1927F
Microcycle
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
sortings
,
trees
1900
x3830
1929D
Sasha and a Walk in the City
combinatorics
,
dp
,
math
,
trees
1900
x4199
14D
Two Paths
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
,
two pointers
1900
x4319
739B
Alyona and a tree
binary search
,
data structures
,
dfs and similar
,
graphs
,
trees
1900
x4430
1746D
Paths on the Tree
dfs and similar
,
dp
,
greedy
,
sortings
,
trees
1900
x4432
1305D
Kuroni and the Celebration
constructive algorithms
,
dfs and similar
,
interactive
,
trees
1900
x4757
1153D
Serval and Rooted Tree
binary search
,
dfs and similar
,
dp
,
greedy
,
trees
1900
x4840
1739D
Reset K Edges
binary search
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
1900
x4893
1882D
Tree XOR
bitmasks
,
dfs and similar
,
dp
,
greedy
,
trees
1900
x4998
472D
Design Tutorial: Inverse the Problem
dfs and similar
,
dsu
,
shortest paths
,
trees
1900
x5038
1702G1
Passable Paths (easy version)
dfs and similar
,
trees
1900
x5133
1895D
XOR Construction
bitmasks
,
constructive algorithms
,
data structures
,
math
,
string suffix structures
,
trees
1900
x5597
455B
A Lot of Games
dfs and similar
,
dp
,
games
,
implementation
,
strings
,
trees
1900
x5685
1436D
Bandit in a City
binary search
,
dfs and similar
,
graphs
,
greedy
,
trees
1900
x5862
191C
Fools and Roads
data structures
,
dfs and similar
,
trees
1900
x6753
1245D
Shichikuji and Power Grid
dsu
,
graphs
,
greedy
,
shortest paths
,
trees
1900
x6926
1404B
Tree Tag
dfs and similar
,
dp
,
games
,
trees
1900
x7096
1092F
Tree with Maximum Cost
dfs and similar
,
dp
,
trees
1900
x7259
1285D
Dr. Evil Underscores
bitmasks
,
brute force
,
dfs and similar
,
divide and conquer
,
dp
,
greedy
,
strings
,
trees
1900
x7352
1369D
TediousLee
dp
,
graphs
,
greedy
,
math
,
trees
1900
x8274
1328E
Tree Queries
dfs and similar
,
graphs
,
trees
1900
x8867
61E
Enemy is weak
data structures
,
trees
1900
x10139
25D
Roads not only in Berland
dsu
,
graphs
,
trees
1900
x10417
638C
Road Improvement
*special problem
,
dfs and similar
,
graphs
,
greedy
,
trees
1800
x1494
452B
4-point polyline
brute force
,
constructive algorithms
,
geometry
,
trees
1800
x1980
436C
Dungeons and Candies
dsu
,
graphs
,
greedy
,
trees
1800
x2581
827B
High Load
constructive algorithms
,
greedy
,
implementation
,
trees
1800
x3438
675D
Tree Construction
data structures
,
trees
1800
x3668
700B
Connecting Universities
dfs and similar
,
dp
,
graphs
,
trees
1800
x3787
1740E
Hanging Hearts
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
greedy
,
trees
1800
x4118
923C
Perfect Security
data structures
,
greedy
,
strings
,
trees
1800
x4158
743D
Chloe and pleasant prizes
dfs and similar
,
dp
,
graphs
,
trees
1800
x4253
1824B1
LuoTianyi and the Floating Islands (Easy Version)
combinatorics
,
math
,
probabilities
,
trees
1800
x4346
1286B
Numbers on Tree
constructive algorithms
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
1800
x4389
274B
Zero Tree
dfs and similar
,
dp
,
greedy
,
trees
1800
x4900
1856E1
PermuTree (easy version)
dfs and similar
,
dp
,
trees
1800
x4926
1833G
Ksyusha and Chinchilla
constructive algorithms
,
dfs and similar
,
dp
,
dsu
,
greedy
,
implementation
,
trees
1800
x4962
1843F1
Omsk Metro (simple version)
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
trees
1800
x4997
1675F
Vlad and Unfinished Business
dfs and similar
,
dp
,
greedy
,
trees
1800
x5036
1083A
The Fair Nut and the Best Path
data structures
,
dp
,
trees
1800
x5208
1851F
Lisa and the Martians
bitmasks
,
greedy
,
math
,
strings
,
trees
1800
x5328
371D
Vessels
data structures
,
dsu
,
implementation
,
trees
1800
x5345
1118F1
Tree Cutting (Easy Version)
dfs and similar
,
trees
1800
x5702
1720D1
Xor-Subsequence (easy version)
bitmasks
,
brute force
,
dp
,
strings
,
trees
,
two pointers
1800
x5739
1534D
Lost Tree
constructive algorithms
,
interactive
,
trees
1800
x5782
1805D
A Wide, Wide Graph
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
1800
x6070
482B
Interesting Array
constructive algorithms
,
data structures
,
trees
1800
x6177
61D
Eternal Victory
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
trees
1800
x6268
1213G
Path Queries
divide and conquer
,
dsu
,
graphs
,
sortings
,
trees
1800
x6642
1244D
Paint the Tree
brute force
,
constructive algorithms
,
dp
,
graphs
,
implementation
,
trees
1800
x7233
1535D
Playoff Tournament
data structures
,
dfs and similar
,
dp
,
implementation
,
trees
1800
x7499
1338B
Edge Weight Assignment
bitmasks
,
constructive algorithms
,
dfs and similar
,
greedy
,
math
,
trees
1800
x8103
1401D
Maximum Distributed Tree
dfs and similar
,
dp
,
greedy
,
implementation
,
math
,
number theory
,
sortings
,
trees
1800
x8870
1324F
Maximum White Subtree
dfs and similar
,
dp
,
graphs
,
trees
1800
x9139
706D
Vasiliy's Multiset
binary search
,
bitmasks
,
data structures
,
trees
1800
x9309
1388C
Uncle Bogdan and Country Happiness
dfs and similar
,
greedy
,
math
,
trees
1800
x9366
161D
Distance in Tree
dfs and similar
,
dp
,
trees
1800
x13654
1970C2
Game on Tree (Medium)
dfs and similar
,
dp
,
games
,
trees
1700
x1235
290C
WTF?
*special problem
,
graph matchings
,
implementation
,
trees
1700
x1518
696B
Puzzles
dfs and similar
,
math
,
probabilities
,
trees
1700
x3390
193A
Cutting Figure
constructive algorithms
,
graphs
,
trees
1700
x3851
507C
Guess Your Way Out!
implementation
,
math
,
trees
1700
x4278
1085D
Minimum Diameter Tree
constructive algorithms
,
implementation
,
trees
1700
x5305
1822F
Gardening Friends
brute force
,
dfs and similar
,
dp
,
graphs
,
trees
1700
x5608
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