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Codeforces Round 959 sponsored by NEAR (Div. 1 + Div. 2)
18:46:13
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*has extra registration
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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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Custom test
Problems
#
Name
1395C
Boboniu and Bit Operations
bitmasks
,
brute force
,
dp
,
greedy
1600
x13814
1391C
Cyclic Permutations
combinatorics
,
dp
,
graphs
,
math
1500
x14728
1389C
Good String
brute force
,
dp
,
greedy
,
two pointers
1500
x18663
1389B
Array Walk
brute force
,
dp
,
greedy
1600
x16230
1385D
a-Good String
bitmasks
,
brute force
,
divide and conquer
,
dp
,
implementation
1500
x18786
1380C
Create The Teams
brute force
,
dp
,
greedy
,
implementation
,
sortings
1400
x20257
1373D
Maximum Sum on Even Positions
divide and conquer
,
dp
,
greedy
,
implementation
1600
x15279
1360E
Polygon
dp
,
graphs
,
implementation
,
shortest paths
1300
x24909
1350B
Orac and Models
dp
,
math
,
number theory
1400
x21393
1336A
Linova and Kingdom
dfs and similar
,
dp
,
greedy
,
sortings
,
trees
1600
x19950
1320A
Journey Planning
data structures
,
dp
,
greedy
,
math
,
sortings
1400
x15959
1315B
Homecoming
binary search
,
dp
,
greedy
,
strings
1300
x9143
1313C1
Skyscrapers (easy version)
brute force
,
data structures
,
dp
,
greedy
1500
x10334
1307C
Cow and Message
brute force
,
dp
,
math
,
strings
1500
x11739
1304C
Air Conditioner
dp
,
greedy
,
implementation
,
sortings
,
two pointers
1500
x16145
1295C
Obtain The String
dp
,
greedy
,
strings
1600
x12793
1288C
Two Arrays
combinatorics
,
dp
1600
x12613
1285B
Just Eat It!
dp
,
greedy
,
implementation
1300
x21919
1284B
New Year and Ascent Sequence
binary search
,
combinatorics
,
data structures
,
dp
,
implementation
,
sortings
1400
x10784
1282B2
K for the Price of One (Hard Version)
dp
,
greedy
,
sortings
1600
x10087
1282B1
K for the Price of One (Easy Version)
dp
,
greedy
,
sortings
1400
x11404
1276A
As Simple as One and Two
dp
,
greedy
1400
x12237
1272D
Remove One Element
brute force
,
dp
1500
x16269
1253C
Sweets Eating
dp
,
greedy
,
math
,
sortings
1500
x14088
1245C
Constanze's Machine
dp
1400
x17237
1238C
Standard Free2play
dp
,
greedy
,
math
1600
x7343
1234C
Pipes
dp
,
implementation
1500
x12452
1215B
The Number of Products
combinatorics
,
dp
,
implementation
1400
x12553
1207C
Gas Pipeline
dp
,
greedy
1500
x9739
1196D2
RGB Substring (hard version)
data structures
,
dp
,
implementation
,
two pointers
1600
x9617
1195C
Basketball Exercise
dp
1400
x24905
1189C
Candies!
data structures
,
dp
,
implementation
,
math
1400
x10490
1178B
WOW Factor
dp
,
strings
1300
x14705
1176C
Lose it!
dp
,
greedy
,
implementation
1300
x14001
1151B
Dima and a Bad XOR
bitmasks
,
brute force
,
constructive algorithms
,
dp
1600
x10923
1109A
Sasha and a Bit of Relax
dp
,
implementation
1600
x8428
1108D
Diverse Garland
constructive algorithms
,
dp
,
greedy
1400
x14867
1105C
Ayoub and Lost Array
combinatorics
,
dp
,
math
1500
x10241
1084C
The Fair Nut and String
combinatorics
,
dp
,
implementation
1500
x7853
1081C
Colorful Bricks
combinatorics
,
dp
,
math
1500
x7168
1056D
Decorate Apple Tree
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
sortings
,
trees
1600
x5767
1051C
Vasya and Multisets
brute force
,
dp
,
greedy
,
implementation
,
math
1500
x9210
1040B
Shashlik Cooking
dp
,
greedy
,
math
1300
x7040
1037C
Equalize
dp
,
greedy
,
strings
1300
x18495
1033C
Permutation Game
brute force
,
dp
,
games
1600
x5487
1005D
Polycarp and Div 3
dp
,
greedy
,
number theory
1500
x9970
991D
Bishwock
dp
,
greedy
1500
x7083
987C
Three displays
brute force
,
dp
,
implementation
1400
x13250
982C
Cut 'em all!
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
1500
x11126
940B
Our Tanya is Crying Out Loud
dp
,
greedy
1400
x8903
928B
Chat
*special problem
,
dp
1400
x2519
913C
Party Lemonade
bitmasks
,
dp
,
greedy
1600
x7808
891A
Pride
brute force
,
dp
,
greedy
,
math
,
number theory
1500
x9889
888D
Almost Identity Permutations
combinatorics
,
dp
,
math
1600
x7956
877B
Nikita and string
brute force
,
dp
1500
x10205
873B
Balanced Substring
dp
,
implementation
1500
x7588
870C
Maximum splitting
dp
,
greedy
,
math
,
number theory
1300
x9016
868C
Qualification Rounds
bitmasks
,
brute force
,
constructive algorithms
,
dp
1500
x4581
859C
Pie Rules
dp
,
games
1500
x5315
858C
Did you mean...
dp
,
greedy
,
implementation
1500
x5594
855B
Marvolo Gaunt's Ring
brute force
,
data structures
,
dp
1500
x8469
839C
Journey
dfs and similar
,
dp
,
graphs
,
probabilities
,
trees
1500
x16294
835C
Star sky
dp
,
implementation
1600
x7711
817C
Really Big Numbers
binary search
,
brute force
,
dp
,
math
1600
x7184
814C
An impassioned circulation of affection
brute force
,
dp
,
strings
,
two pointers
1600
x6398
812B
Sagheer, the Hausmeister
bitmasks
,
brute force
,
dp
1600
x5135
798B
Mike and strings
brute force
,
dp
,
strings
1300
x8309
797B
Odd sum
dp
,
greedy
,
implementation
1400
x10315
788A
Functions again
dp
,
two pointers
1600
x9017
777C
Alyona and Spreadsheet
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
two pointers
1600
x6319
777B
Game of Credit Cards
data structures
,
dp
,
greedy
,
sortings
1300
x9384
763A
Timofey and a tree
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
trees
1600
x10298
761C
Dasha and Password
brute force
,
dp
,
implementation
1500
x5855
756B
Travel Card
binary search
,
dp
1600
x3418
741B
Arpa's weak amphitheater and Mehrdad's valuable Hoses
dfs and similar
,
dp
,
dsu
1600
x5176
734C
Anton and Making Potions
binary search
,
dp
,
greedy
,
two pointers
1600
x5311
706C
Hard problem
dp
,
strings
1600
x15893
698A
Vacations
dp
1400
x29381
682C
Alyona and the Tree
dfs and similar
,
dp
,
graphs
,
trees
1600
x7071
676C
Vasya and String
binary search
,
dp
,
strings
,
two pointers
1500
x18426
665C
Simple Strings
dp
,
greedy
,
strings
1300
x9698
660C
Hard Process
binary search
,
dp
,
two pointers
1600
x9214
653B
Bear and Compressing
brute force
,
dfs and similar
,
dp
,
strings
1300
x4914
637D
Running with Obstacles
*special problem
,
data structures
,
dp
,
greedy
1600
x1980
628B
New Skateboard
dp
1300
x10479
626B
Cards
constructive algorithms
,
dp
,
math
1300
x6560
615B
Longtail Hedgehog
dp
,
graphs
1600
x4998
611C
New Year and Domino
dp
,
implementation
1500
x8396
607A
Chain Reaction
binary search
,
dp
1600
x9435
603A
Alternative Thinking
dp
,
greedy
,
math
1600
x7594
602B
Approximating a Constant Range
dp
,
implementation
,
two pointers
1400
x10616
597B
Restaurant
dp
,
greedy
,
sortings
1600
x4718
573B
Bear and Blocks
binary search
,
data structures
,
dp
,
math
1600
x5743
566F
Clique in the Divisibility Graph
dp
,
math
,
number theory
1500
x3563
553A
Kyoya and Colored Balls
combinatorics
,
dp
,
math
1500
x8466
550C
Divisibility by Eight
brute force
,
dp
,
math
1500
x27859
550A
Two Substrings
brute force
,
dp
,
greedy
,
implementation
,
strings
1500
x37060
548B
Mike and Fun
brute force
,
dp
,
greedy
,
implementation
1400
x8348
545C
Woodcutters
dp
,
greedy
1500
x27099
538B
Quasi Binary
constructive algorithms
,
dp
,
greedy
,
implementation
1400
x17778
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