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CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!)
37:55:06
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Difficulty:
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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
1675F
Vlad and Unfinished Business
dfs and similar
,
dp
,
greedy
,
trees
1800
x4919
1843F1
Omsk Metro (simple version)
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
trees
1800
x4864
274B
Zero Tree
dfs and similar
,
dp
,
greedy
,
trees
1800
x4859
1856E1
PermuTree (easy version)
dfs and similar
,
dp
,
trees
1800
x4798
1833G
Ksyusha and Chinchilla
constructive algorithms
,
dfs and similar
,
dp
,
dsu
,
greedy
,
implementation
,
trees
1800
x4794
1286B
Numbers on Tree
constructive algorithms
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
1800
x4315
1824B1
LuoTianyi and the Floating Islands (Easy Version)
combinatorics
,
math
,
probabilities
,
trees
1800
x4258
743D
Chloe and pleasant prizes
dfs and similar
,
dp
,
graphs
,
trees
1800
x4230
923C
Perfect Security
data structures
,
greedy
,
strings
,
trees
1800
x4104
1740E
Hanging Hearts
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
greedy
,
trees
1800
x4052
700B
Connecting Universities
dfs and similar
,
dp
,
graphs
,
trees
1800
x3737
675D
Tree Construction
data structures
,
trees
1800
x3531
827B
High Load
constructive algorithms
,
greedy
,
implementation
,
trees
1800
x3429
436C
Dungeons and Candies
dsu
,
graphs
,
greedy
,
trees
1800
x2574
452B
4-point polyline
brute force
,
constructive algorithms
,
geometry
,
trees
1800
x1968
638C
Road Improvement
*special problem
,
dfs and similar
,
graphs
,
greedy
,
trees
1800
x1467
25D
Roads not only in Berland
dsu
,
graphs
,
trees
1900
x10104
61E
Enemy is weak
data structures
,
trees
1900
x9859
1328E
Tree Queries
dfs and similar
,
graphs
,
trees
1900
x8670
1369D
TediousLee
dp
,
graphs
,
greedy
,
math
,
trees
1900
x8216
1285D
Dr. Evil Underscores
bitmasks
,
brute force
,
dfs and similar
,
divide and conquer
,
dp
,
greedy
,
strings
,
trees
1900
x7225
1404B
Tree Tag
dfs and similar
,
dp
,
games
,
trees
1900
x7027
1092F
Tree with Maximum Cost
dfs and similar
,
dp
,
trees
1900
x6906
1245D
Shichikuji and Power Grid
dsu
,
graphs
,
greedy
,
shortest paths
,
trees
1900
x6778
191C
Fools and Roads
data structures
,
dfs and similar
,
trees
1900
x6627
1436D
Bandit in a City
binary search
,
dfs and similar
,
graphs
,
greedy
,
trees
1900
x5801
455B
A Lot of Games
dfs and similar
,
dp
,
games
,
implementation
,
strings
,
trees
1900
x5608
1895D
XOR Construction
bitmasks
,
constructive algorithms
,
data structures
,
math
,
string suffix structures
,
trees
1900
x5391
1702G1
Passable Paths (easy version)
dfs and similar
,
trees
1900
x5034
472D
Design Tutorial: Inverse the Problem
dfs and similar
,
dsu
,
shortest paths
,
trees
1900
x4950
1739D
Reset K Edges
binary search
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
1900
x4785
1882D
Tree XOR
bitmasks
,
dfs and similar
,
dp
,
greedy
,
trees
1900
x4751
1305D
Kuroni and the Celebration
constructive algorithms
,
dfs and similar
,
interactive
,
trees
1900
x4687
1153D
Serval and Rooted Tree
binary search
,
dfs and similar
,
dp
,
greedy
,
trees
1900
x4669
739B
Alyona and a tree
binary search
,
data structures
,
dfs and similar
,
graphs
,
trees
1900
x4373
1746D
Paths on the Tree
dfs and similar
,
dp
,
greedy
,
sortings
,
trees
1900
x4361
14D
Two Paths
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
,
two pointers
1900
x4263
1929D
Sasha and a Walk in the City
combinatorics
,
dp
,
math
,
trees
1900
x3912
685B
Kay and Snowflake
data structures
,
dfs and similar
,
dp
,
trees
1900
x3721
1172B
Nauuo and Circle
combinatorics
,
dfs and similar
,
dp
,
trees
1900
x3703
1797D
Li Hua and Tree
brute force
,
data structures
,
dfs and similar
,
dp
,
implementation
,
trees
1900
x3623
1902E
Collapsing Strings
data structures
,
strings
,
trees
1900
x3603
1611E2
Escape The Maze (hard version)
dfs and similar
,
dp
,
greedy
,
shortest paths
,
trees
1900
x3591
1076E
Vasya and a Tree
data structures
,
trees
1900
x3589
1927F
Microcycle
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
sortings
,
trees
1900
x3530
832D
Misha, Grisha and Underground
dfs and similar
,
graphs
,
trees
1900
x3520
1914F
Programming Competition
dfs and similar
,
dp
,
graph matchings
,
greedy
,
trees
1900
x3511
1774E
Two Chess Pieces
dfs and similar
,
dp
,
greedy
,
trees
1900
x3283
1738D
Permutation Addicts
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
trees
1900
x3283
109C
Lucky Tree
dp
,
dsu
,
trees
1900
x3169
1777D
Score of a Tree
bitmasks
,
combinatorics
,
dfs and similar
,
dp
,
math
,
probabilities
,
trees
1900
x3143
722D
Generating Sets
binary search
,
data structures
,
dfs and similar
,
greedy
,
strings
,
trees
1900
x3059
500D
New Year Santa Network
combinatorics
,
dfs and similar
,
graphs
,
trees
1900
x3021
1714F
Build a Tree and That Is It
constructive algorithms
,
implementation
,
trees
1900
x3019
796C
Bank Hacking
constructive algorithms
,
data structures
,
dp
,
trees
1900
x2956
6E
Exposition
binary search
,
data structures
,
dsu
,
trees
,
two pointers
1900
x2923
792D
Paths in a Complete Binary Tree
bitmasks
,
trees
1900
x2874
1899G
Unusual Entertainment
data structures
,
dfs and similar
,
dsu
,
shortest paths
,
sortings
,
trees
,
two pointers
1900
x2793
1926G
Vlad and Trouble at MIT
dfs and similar
,
dp
,
flows
,
graphs
,
greedy
,
implementation
,
trees
1900
x2678
982D
Shark
brute force
,
data structures
,
dsu
,
trees
1900
x2231
1141G
Privatization of Roads in Treeland
binary search
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
1900
x2170
1044B
Intersecting Subtrees
dfs and similar
,
interactive
,
trees
1900
x1539
1184E1
Daleks' Invasion (easy)
graphs
,
trees
1900
x1538
37C
Old Berland Language
data structures
,
greedy
,
trees
1900
x1483
928D
Autocompletion
*special problem
,
strings
,
trees
1900
x796
1363E
Tree Shuffling
dfs and similar
,
dp
,
greedy
,
trees
2000
x6441
1388D
Captain Flint and Treasure
data structures
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
trees
2000
x6083
383C
Propagating tree
data structures
,
dfs and similar
,
trees
2000
x6016
337D
Book of Evil
dfs and similar
,
divide and conquer
,
dp
,
trees
2000
x5733
1399E1
Weights Division (easy version)
data structures
,
dfs and similar
,
greedy
,
trees
2000
x5622
1454E
Number of Simple Paths
combinatorics
,
dfs and similar
,
graphs
,
trees
2000
x5446
461B
Appleman and Tree
dfs and similar
,
dp
,
trees
2000
x5255
1294F
Three Paths on a Tree
dfs and similar
,
dp
,
greedy
,
trees
2000
x5239
1304E
1-Trees and Queries
data structures
,
dfs and similar
,
shortest paths
,
trees
2000
x4811
1101D
GCD Counting
data structures
,
dfs and similar
,
dp
,
number theory
,
trees
2000
x4351
1702G2
Passable Paths (hard version)
data structures
,
dfs and similar
,
trees
2000
x4208
877E
Danil and a Part-time Job
bitmasks
,
data structures
,
trees
2000
x4185
1416C
XOR Inverse
bitmasks
,
data structures
,
divide and conquer
,
dp
,
greedy
,
math
,
sortings
,
strings
,
trees
2000
x4131
1566E
Buds Re-hanging
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
2000
x3984
1857G
Counting Graphs
combinatorics
,
divide and conquer
,
dsu
,
graphs
,
greedy
,
sortings
,
trees
2000
x3968
767C
Garland
dfs and similar
,
graphs
,
greedy
,
trees
2000
x3926
1827B1
Range Sorting (Easy Version)
binary search
,
dp
,
dsu
,
greedy
,
trees
,
two pointers
2000
x3603
1726D
Edge Split
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
probabilities
,
trees
2000
x3509
1646D
Weight the Tree
constructive algorithms
,
dfs and similar
,
dp
,
implementation
,
trees
2000
x3488
842C
Ilya And The Tree
dfs and similar
,
graphs
,
math
,
number theory
,
trees
2000
x3386
1891F
A Growing Tree
data structures
,
dfs and similar
,
trees
2000
x3271
1210C
Kamil and Making a Stream
math
,
number theory
,
trees
2000
x3189
1682D
Circular Spanning Tree
constructive algorithms
,
implementation
,
trees
2000
x3144
474E
Pillars
binary search
,
data structures
,
dp
,
sortings
,
trees
2000
x3052
1060E
Sergey and Subway
dfs and similar
,
dp
,
trees
2000
x2957
1923E
Count Paths
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
,
trees
2000
x2877
1851G
Vlad and the Mountains
binary search
,
data structures
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
,
two pointers
2000
x2831
1815B
Sum Graph
brute force
,
constructive algorithms
,
graphs
,
implementation
,
interactive
,
shortest paths
,
trees
2000
x2801
963B
Destruction of a Tree
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
2000
x2680
817E
Choosing The Commander
bitmasks
,
data structures
,
trees
2000
x2656
1142B
Lynyrd Skynyrd
data structures
,
dfs and similar
,
dp
,
math
,
trees
2000
x2601
1214E
Petya and Construction Set
constructive algorithms
,
graphs
,
math
,
sortings
,
trees
2000
x2491
1280C
Jeremy Bearimy
dfs and similar
,
graphs
,
greedy
,
trees
2000
x2422
1010D
Mars rover
dfs and similar
,
graphs
,
implementation
,
trees
2000
x2298
533B
Work Group
dfs and similar
,
dp
,
graphs
,
strings
,
trees
2000
x2290
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