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Name
337D
Book of Evil
dfs and similar
,
divide and conquer
,
dp
,
trees
2000
x5834
1534D
Lost Tree
constructive algorithms
,
interactive
,
trees
1800
x5780
1057A
Bmail Computer Network
*special problem
,
dfs and similar
,
trees
900
x5772
1720D1
Xor-Subsequence (easy version)
bitmasks
,
brute force
,
dp
,
strings
,
trees
,
two pointers
1800
x5735
1118F1
Tree Cutting (Easy Version)
dfs and similar
,
trees
1800
x5697
1399E1
Weights Division (easy version)
data structures
,
dfs and similar
,
greedy
,
trees
2000
x5692
959C
Mahmoud and Ehab and the wrong algorithm
constructive algorithms
,
trees
1500
x5689
455B
A Lot of Games
dfs and similar
,
dp
,
games
,
implementation
,
strings
,
trees
1900
x5683
1056D
Decorate Apple Tree
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
sortings
,
trees
1600
x5639
698B
Fix a Tree
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
trees
1700
x5614
1822F
Gardening Friends
brute force
,
dfs and similar
,
dp
,
graphs
,
trees
1700
x5596
1895D
XOR Construction
bitmasks
,
constructive algorithms
,
data structures
,
math
,
string suffix structures
,
trees
1900
x5591
1454E
Number of Simple Paths
combinatorics
,
dfs and similar
,
graphs
,
trees
2000
x5519
501C
Misha and Forest
constructive algorithms
,
data structures
,
greedy
,
sortings
,
trees
1500
x5509
343D
Water Tree
data structures
,
dfs and similar
,
graphs
,
trees
2100
x5493
886C
Petya and Catacombs
dsu
,
greedy
,
implementation
,
trees
1300
x5433
1294F
Three Paths on a Tree
dfs and similar
,
dp
,
greedy
,
trees
2000
x5360
371D
Vessels
data structures
,
dsu
,
implementation
,
trees
1800
x5341
461B
Appleman and Tree
dfs and similar
,
dp
,
trees
2000
x5337
1851F
Lisa and the Martians
bitmasks
,
greedy
,
math
,
strings
,
trees
1800
x5322
1085D
Minimum Diameter Tree
constructive algorithms
,
implementation
,
trees
1700
x5304
620E
New Year Tree
bitmasks
,
data structures
,
trees
2100
x5213
1083A
The Fair Nut and the Best Path
data structures
,
dp
,
trees
1800
x5203
981C
Useful Decomposition
implementation
,
trees
1400
x5161
455C
Civilization
dfs and similar
,
dp
,
dsu
,
ternary search
,
trees
2100
x5156
796D
Police Stations
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
2100
x5137
1702G1
Passable Paths (easy version)
dfs and similar
,
trees
1900
x5126
1009F
Dominant Indices
data structures
,
dsu
,
trees
2300
x5123
1675F
Vlad and Unfinished Business
dfs and similar
,
dp
,
greedy
,
trees
1800
x5032
472D
Design Tutorial: Inverse the Problem
dfs and similar
,
dsu
,
shortest paths
,
trees
1900
x5032
901A
Hashing Trees
constructive algorithms
,
trees
1500
x5011
1843F1
Omsk Metro (simple version)
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
trees
1800
x4992
1882D
Tree XOR
bitmasks
,
dfs and similar
,
dp
,
greedy
,
trees
1900
x4985
1833G
Ksyusha and Chinchilla
constructive algorithms
,
dfs and similar
,
dp
,
dsu
,
greedy
,
implementation
,
trees
1800
x4959
1304E
1-Trees and Queries
data structures
,
dfs and similar
,
shortest paths
,
trees
2000
x4925
1856E1
PermuTree (easy version)
dfs and similar
,
dp
,
trees
1800
x4920
274B
Zero Tree
dfs and similar
,
dp
,
greedy
,
trees
1800
x4896
1739D
Reset K Edges
binary search
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
1900
x4889
1153D
Serval and Rooted Tree
binary search
,
dfs and similar
,
dp
,
greedy
,
trees
1900
x4838
1305D
Kuroni and the Celebration
constructive algorithms
,
dfs and similar
,
interactive
,
trees
1900
x4757
1746D
Paths on the Tree
dfs and similar
,
dp
,
greedy
,
sortings
,
trees
1900
x4430
1101D
GCD Counting
data structures
,
dfs and similar
,
dp
,
number theory
,
trees
2000
x4427
739B
Alyona and a tree
binary search
,
data structures
,
dfs and similar
,
graphs
,
trees
1900
x4427
1286B
Numbers on Tree
constructive algorithms
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
1800
x4388
1702G2
Passable Paths (hard version)
data structures
,
dfs and similar
,
trees
2000
x4339
1824B1
LuoTianyi and the Floating Islands (Easy Version)
combinatorics
,
math
,
probabilities
,
trees
1800
x4337
14D
Two Paths
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
,
two pointers
1900
x4316
802J
Send the Fool Further! (easy)
dfs and similar
,
graphs
,
trees
1400
x4299
507C
Guess Your Way Out!
implementation
,
math
,
trees
1700
x4278
877E
Danil and a Part-time Job
bitmasks
,
data structures
,
trees
2000
x4260
743D
Chloe and pleasant prizes
dfs and similar
,
dp
,
graphs
,
trees
1800
x4253
1929D
Sasha and a Walk in the City
combinatorics
,
dp
,
math
,
trees
1900
x4190
1416C
XOR Inverse
bitmasks
,
data structures
,
divide and conquer
,
dp
,
greedy
,
math
,
sortings
,
strings
,
trees
2000
x4186
923C
Perfect Security
data structures
,
greedy
,
strings
,
trees
1800
x4157
1740E
Hanging Hearts
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
greedy
,
trees
1800
x4117
1857G
Counting Graphs
combinatorics
,
divide and conquer
,
dsu
,
graphs
,
greedy
,
sortings
,
trees
2000
x4098
1566E
Buds Re-hanging
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
2000
x4020
1364D
Ehab's Last Corollary
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
trees
2100
x4018
767C
Garland
dfs and similar
,
graphs
,
greedy
,
trees
2000
x3982
1000E
We Need More Bosses
dfs and similar
,
graphs
,
trees
2100
x3950
1555E
Boring Segments
data structures
,
sortings
,
trees
,
two pointers
2100
x3866
486D
Valid Sets
dfs and similar
,
dp
,
math
,
trees
2100
x3858
193A
Cutting Figure
constructive algorithms
,
graphs
,
trees
1700
x3845
1927F
Microcycle
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
sortings
,
trees
1900
x3818
685B
Kay and Snowflake
data structures
,
dfs and similar
,
dp
,
trees
1900
x3787
700B
Connecting Universities
dfs and similar
,
dp
,
graphs
,
trees
1800
x3782
1902E
Collapsing Strings
data structures
,
strings
,
trees
1900
x3773
1172B
Nauuo and Circle
combinatorics
,
dfs and similar
,
dp
,
trees
1900
x3742
734E
Anton and Tree
dfs and similar
,
dp
,
trees
2100
x3736
1278D
Segment Tree
data structures
,
dsu
,
graphs
,
trees
2100
x3729
1797D
Li Hua and Tree
brute force
,
data structures
,
dfs and similar
,
dp
,
implementation
,
trees
1900
x3706
1156D
0-1-Tree
dfs and similar
,
divide and conquer
,
dp
,
dsu
,
trees
2200
x3691
1914F
Programming Competition
dfs and similar
,
dp
,
graph matchings
,
greedy
,
trees
1900
x3688
587C
Duff in the Army
data structures
,
trees
2200
x3682
1827B1
Range Sorting (Easy Version)
binary search
,
dp
,
dsu
,
greedy
,
trees
,
two pointers
2000
x3669
1611E2
Escape The Maze (hard version)
dfs and similar
,
dp
,
greedy
,
shortest paths
,
trees
1900
x3661
675D
Tree Construction
data structures
,
trees
1800
x3655
1076E
Vasya and a Tree
data structures
,
trees
1900
x3615
832D
Misha, Grisha and Underground
dfs and similar
,
graphs
,
trees
1900
x3610
1919D
01 Tree
constructive algorithms
,
data structures
,
dsu
,
greedy
,
sortings
,
trees
2100
x3607
690C2
Brain Network (medium)
dfs and similar
,
graphs
,
trees
1500
x3584
1726D
Edge Split
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
probabilities
,
trees
2000
x3551
1646D
Weight the Tree
constructive algorithms
,
dfs and similar
,
dp
,
implementation
,
trees
2000
x3549
280C
Game on Tree
implementation
,
math
,
probabilities
,
trees
2200
x3511
120F
Spiders
dp
,
greedy
,
trees
1400
x3510
827B
High Load
constructive algorithms
,
greedy
,
implementation
,
trees
1800
x3437
842C
Ilya And The Tree
dfs and similar
,
graphs
,
math
,
number theory
,
trees
2000
x3415
1446C
Xor Tree
binary search
,
bitmasks
,
data structures
,
divide and conquer
,
dp
,
trees
2100
x3397
696B
Puzzles
dfs and similar
,
math
,
probabilities
,
trees
1700
x3386
1891F
A Growing Tree
data structures
,
dfs and similar
,
trees
2000
x3385
282E
Sausage Maximization
bitmasks
,
data structures
,
trees
2200
x3363
1738D
Permutation Addicts
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
trees
1900
x3331
1774E
Two Chess Pieces
dfs and similar
,
dp
,
greedy
,
trees
1900
x3318
1656E
Equal Tree Sums
constructive algorithms
,
dfs and similar
,
math
,
trees
2200
x3304
1025D
Recovering BST
brute force
,
dp
,
math
,
number theory
,
trees
2100
x3300
1777D
Score of a Tree
bitmasks
,
combinatorics
,
dfs and similar
,
dp
,
math
,
probabilities
,
trees
1900
x3227
1923E
Count Paths
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
,
trees
2000
x3209
1210C
Kamil and Making a Stream
math
,
number theory
,
trees
2000
x3205
1175E
Minimal Segment Cover
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
greedy
,
implementation
,
trees
2200
x3205
109C
Lucky Tree
dp
,
dsu
,
trees
1900
x3193
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