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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
19:55:12
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Difficulty:
—
dp
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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Status
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Custom test
Problems
#
Name
1132F
Clear the String
dp
2000
x8384
1132E
Knapsack
dfs and similar
,
dp
,
greedy
2300
x1509
1131G
Most Dangerous Shark
data structures
,
dp
,
two pointers
2700
x444
1131E
String Multiplication
dp
,
greedy
,
strings
2300
x1154
1131D
Gourmet choice
dfs and similar
,
dp
,
dsu
,
graphs
,
greedy
2000
x3320
1129D
Isolation
data structures
,
dp
2900
x1100
1129C
Morse Code
binary search
,
data structures
,
dp
,
hashing
,
sortings
,
string suffix structures
,
strings
2400
x930
1120F
Secret Letters
data structures
,
dp
,
greedy
3100
x261
1120D
Power Tree
dfs and similar
,
dp
,
dsu
,
graphs
,
greedy
,
trees
2500
x1422
1120C
Compress String
dp
,
strings
2100
x2117
1119F
Niyaz and Small Degrees
data structures
,
dp
,
trees
3400
x732
1119E
Pavel and Triangles
brute force
,
dp
,
fft
,
greedy
,
ternary search
1900
x5054
1118F2
Tree Cutting (Hard Version)
combinatorics
,
dfs and similar
,
dp
,
trees
2700
x544
1117F
Crisp String
bitmasks
,
dp
2500
x587
1117D
Magic Gems
dp
,
math
,
matrices
2100
x4358
1114D
Flood Fill
dp
1900
x6858
1113A
Sasha and His Trip
dp
,
greedy
,
math
900
x17379
1111E
Tree
data structures
,
dfs and similar
,
dp
,
graphs
,
trees
2500
x945
1111D
Destroy the Colony
combinatorics
,
dp
,
math
2600
x973
1110H
Modest Substrings
dp
,
strings
3500
x283
1110D
Jongmah
dp
2200
x3589
1109D
Sasha and Interesting Fact from Graph Theory
brute force
,
combinatorics
,
dp
,
math
,
trees
2400
x1346
1109A
Sasha and a Bit of Relax
dp
,
implementation
1600
x8529
1108D
Diverse Garland
constructive algorithms
,
dp
,
greedy
1400
x15314
1107G
Vasya and Maximum Profit
binary search
,
constructive algorithms
,
data structures
,
dp
,
dsu
2400
x1072
1107F
Vasya and Endless Credits
dp
,
flows
,
graph matchings
,
graphs
,
sortings
2600
x806
1107E
Vasya and Binary String
dp
2400
x2334
1107D
Compression
dp
,
implementation
,
math
,
number theory
1800
x3736
1106E
Lunar New Year and Red Envelopes
data structures
,
dp
2100
x2585
1105E
Helping Hiasat
bitmasks
,
brute force
,
dp
,
meet-in-the-middle
2200
x1659
1105C
Ayoub and Lost Array
combinatorics
,
dp
,
math
1500
x10445
1103D
Professional layer
bitmasks
,
dp
3100
x414
1102F
Elongated Matrix
binary search
,
bitmasks
,
brute force
,
dp
,
graphs
2000
x2031
1101F
Trucks and Cities
binary search
,
dp
2400
x1370
1101D
GCD Counting
data structures
,
dfs and similar
,
dp
,
number theory
,
trees
2000
x4741
1099F
Cookies
binary search
,
data structures
,
dfs and similar
,
dp
,
games
,
trees
2400
x961
1097H
Mateusz and an Infinite Sequence
bitmasks
,
brute force
,
dp
,
strings
3400
x95
1097G
Vladislav and a Great Legend
combinatorics
,
dp
,
trees
3000
x769
1097D
Makoto and a Blackboard
dp
,
math
,
number theory
,
probabilities
2200
x2874
1097B
Petr and a Combination Lock
bitmasks
,
brute force
,
dp
1200
x29223
1096G
Lucky Tickets
divide and conquer
,
dp
,
fft
2400
x1506
1096F
Inversion Expectation
dp
,
math
,
probabilities
2300
x1812
1096E
The Top Scorer
combinatorics
,
dp
,
math
,
probabilities
2500
x1024
1096D
Easy Problem
dp
1800
x8180
1093F
Vasya and Array
dp
2400
x1019
1092F
Tree with Maximum Cost
dfs and similar
,
dp
,
trees
1900
x8279
1091D
New Year and the Permutation Concatenation
combinatorics
,
dp
,
math
1700
x6812
1089A
Alice the Fan
dp
2200
x1146
1088E
Ehab and a component choosing problem
dp
,
greedy
,
math
,
trees
2400
x1493
1085G
Beautiful Matrix
combinatorics
,
data structures
,
dp
2900
x526
1084C
The Fair Nut and String
combinatorics
,
dp
,
implementation
1500
x8234
1083E
The Fair Nut and Rectangles
data structures
,
dp
,
geometry
2400
x4322
1083A
The Fair Nut and the Best Path
data structures
,
dp
,
trees
1800
x5493
1082F
Speed Dial
dp
,
strings
,
trees
2800
x423
1082E
Increasing Frequency
binary search
,
dp
,
greedy
2000
x4668
1081C
Colorful Bricks
combinatorics
,
dp
,
math
1500
x7344
1077F2
Pictures with Kittens (hard version)
data structures
,
dp
2100
x3381
1077F1
Pictures with Kittens (easy version)
dp
1900
x4481
1076F
Summer Practice Report
dp
,
greedy
2500
x646
1073F
Choosing Two Paths
dfs and similar
,
dp
,
greedy
,
trees
2500
x547
1073E
Segment Sum
bitmasks
,
combinatorics
,
dp
,
math
2300
x2658
1070J
Streets and Avenues in Berhattan
dp
2300
x700
1070G
Monsters and Potions
brute force
,
dp
,
greedy
,
implementation
2300
x844
1070A
Find a Number
dp
,
graphs
,
number theory
,
shortest paths
2200
x2373
1067E
Random Forest Rank
dp
,
graph matchings
,
math
,
trees
2800
x454
1067D
Computer Game
dp
,
greedy
,
math
,
probabilities
3100
x407
1067A
Array Without Local Maximums
dp
1900
x2898
1066F
Yet another 2D Walking
dp
2100
x2073
1065F
Up and Down the Tree
dfs and similar
,
dp
,
trees
2500
x1192
1065D
Three Pieces
dfs and similar
,
dp
,
shortest paths
2200
x1325
1063F
String Journey
data structures
,
dp
,
string suffix structures
3300
x891
1061C
Multiplicity
data structures
,
dp
,
implementation
,
math
,
number theory
1700
x9024
1060F
Shrinking Tree
combinatorics
,
dp
2900
x604
1060E
Sergey and Subway
dfs and similar
,
dp
,
trees
2000
x3189
1059E
Split the Tree
binary search
,
data structures
,
dp
,
greedy
,
trees
2400
x1451
1057C
Tanya and Colored Candies
*special problem
,
dp
2000
x941
1056F
Write The Contest
binary search
,
dp
,
math
2500
x663
1056D
Decorate Apple Tree
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
sortings
,
trees
1600
x5951
1055E
Segments on the Line
binary search
,
dp
2500
x734
1051E
Vasya and Big Integers
binary search
,
data structures
,
dp
,
hashing
,
strings
2600
x976
1051D
Bicolorings
bitmasks
,
dp
1700
x7436
1051C
Vasya and Multisets
brute force
,
dp
,
greedy
,
implementation
,
math
1500
x9304
1044C
Optimal Polygon Perimeter
dp
,
geometry
2100
x1355
1043F
Make It One
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
,
shortest paths
2500
x2422
1042E
Vasya and Magic Matrix
dp
,
math
,
probabilities
2300
x1809
1042B
Vitamins
bitmasks
,
brute force
,
dp
,
implementation
1200
x16337
1041F
Ray in the tube
data structures
,
divide and conquer
,
dp
,
math
2500
x1505
1040B
Shashlik Cooking
dp
,
greedy
,
math
1300
x7130
1039D
You Are Given a Tree
data structures
,
dp
,
trees
2800
x1857
1038F
Wrap Around
dp
,
strings
2900
x348
1038E
Maximum Matching
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
2400
x990
1038D
Slime
dp
,
greedy
,
implementation
1800
x8419
1037C
Equalize
dp
,
greedy
,
strings
1300
x18950
1036C
Classy Numbers
combinatorics
,
dp
1900
x9818
1034E
Little C Loves 3 III
bitmasks
,
dp
,
math
3200
x644
1034C
Region Separation
combinatorics
,
dp
,
number theory
,
trees
2700
x888
1033C
Permutation Game
brute force
,
dp
,
games
1600
x5621
1032F
Vasya and Maximum Matching
dp
,
trees
2400
x968
1032E
The Unbearable Lightness of Weights
dp
,
math
2100
x1692
1032C
Playing Piano
constructive algorithms
,
dp
1700
x3998
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