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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
21:54:08
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Difficulty:
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two pointers
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
1379D
New Passenger Trams
binary search
,
brute force
,
data structures
,
sortings
,
two pointers
2300
x1090
1379C
Choosing flowers
binary search
,
brute force
,
data structures
,
dfs and similar
,
dp
,
greedy
,
sortings
,
two pointers
2000
x5620
1374E2
Reading Books (hard version)
data structures
,
greedy
,
implementation
,
sortings
,
ternary search
,
two pointers
2500
x945
1374D
Zero Remainder Array
math
,
sortings
,
two pointers
1400
x24117
1372E
Omkar and Last Floor
dp
,
greedy
,
two pointers
2900
x1188
1369C
RationalLee
greedy
,
math
,
sortings
,
two pointers
1400
x19680
1367F2
Flying Sort (Hard Version)
binary search
,
data structures
,
dp
,
greedy
,
sortings
,
two pointers
2400
x1683
1367F1
Flying Sort (Easy Version)
dp
,
greedy
,
two pointers
2100
x3303
1366E
Two Arrays
binary search
,
brute force
,
combinatorics
,
constructive algorithms
,
dp
,
two pointers
2100
x4301
1366B
Shuffle
math
,
two pointers
1300
x21307
1364B
Most socially-distanced subsequence
greedy
,
two pointers
1300
x20118
1364A
XXXXX
brute force
,
data structures
,
number theory
,
two pointers
1200
x28410
1359D
Yet Another Yet Another Task
data structures
,
dp
,
implementation
,
two pointers
2000
x9558
1359B
New Theatre Square
brute force
,
dp
,
greedy
,
implementation
,
two pointers
1000
x27926
1358D
The Best Vacation
binary search
,
brute force
,
greedy
,
implementation
,
two pointers
1900
x8225
1355C
Count Triangles
binary search
,
implementation
,
math
,
two pointers
1800
x10737
1354B
Ternary String
binary search
,
dp
,
implementation
,
two pointers
1200
x31288
1352E
Special Elements
brute force
,
implementation
,
two pointers
1500
x20751
1343D
Constant Palindrome Sum
brute force
,
data structures
,
greedy
,
two pointers
1700
x12766
1343C
Alternating Subsequence
dp
,
greedy
,
two pointers
1200
x38754
1342D
Multiple Testcases
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
,
two pointers
1900
x6126
1336B
Xenia and Colorful Gems
binary search
,
greedy
,
math
,
sortings
,
two pointers
1700
x11419
1335E2
Three Blocks Palindrome (hard version)
brute force
,
data structures
,
dp
,
two pointers
1800
x8389
1335E1
Three Blocks Palindrome (easy version)
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x10898
1333F
Kate and imperfection
greedy
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2200
x4286
1333C
Eugene and an array
binary search
,
data structures
,
implementation
,
two pointers
1700
x12644
1327F
AND Segments
bitmasks
,
combinatorics
,
data structures
,
dp
,
two pointers
2500
x1698
1326E
Bombs
data structures
,
two pointers
2400
x2195
1324D
Pair of Topics
binary search
,
data structures
,
sortings
,
two pointers
1400
x28799
1313E
Concatenation with intersection
data structures
,
hashing
,
strings
,
two pointers
2700
x555
1312F
Attack on Red Kingdom
games
,
two pointers
2500
x920
1305B
Kuroni and Simple Strings
constructive algorithms
,
greedy
,
strings
,
two pointers
1200
x11803
1304D
Shortest and Longest LIS
constructive algorithms
,
graphs
,
greedy
,
two pointers
1800
x6354
1304C
Air Conditioner
dp
,
greedy
,
implementation
,
sortings
,
two pointers
1500
x16487
1290B
Irreducible Anagrams
binary search
,
constructive algorithms
,
data structures
,
strings
,
two pointers
1800
x5513
1285E
Delete a Segment
brute force
,
constructive algorithms
,
data structures
,
dp
,
graphs
,
sortings
,
trees
,
two pointers
2300
x1851
1282C
Petya and Exam
greedy
,
sortings
,
two pointers
1800
x4332
1272F
Two Bracket Sequences
dp
,
strings
,
two pointers
2200
x1988
1266D
Decreasing Debts
constructive algorithms
,
data structures
,
graphs
,
greedy
,
implementation
,
math
,
two pointers
2000
x3650
1265B
Beautiful Numbers
data structures
,
implementation
,
math
,
two pointers
1300
x12744
1257D
Yet Another Monster Killing Problem
binary search
,
data structures
,
dp
,
greedy
,
sortings
,
two pointers
1700
x7620
1257C
Dominated Subarray
greedy
,
implementation
,
sortings
,
strings
,
two pointers
1200
x16067
1254B2
Send Boxes to Alice (Hard Version)
constructive algorithms
,
greedy
,
math
,
number theory
,
ternary search
,
two pointers
2100
x3205
1254B1
Send Boxes to Alice (Easy Version)
constructive algorithms
,
greedy
,
math
,
number theory
,
ternary search
,
two pointers
1800
x4695
1252E
Songwriter
greedy
,
two pointers
2200
x1251
1251C
Minimize The Integer
greedy
,
two pointers
1600
x12528
1251A
Broken Keyboard
brute force
,
strings
,
two pointers
1000
x19764
1250G
Discarding Game
dp
,
greedy
,
two pointers
2300
x724
1244E
Minimizing Difference
binary search
,
constructive algorithms
,
greedy
,
sortings
,
ternary search
,
two pointers
2000
x5250
1237B
Balanced Tunnel
data structures
,
sortings
,
two pointers
1300
x16316
1225B2
TV Subscriptions (Hard Version)
implementation
,
two pointers
1300
x10760
1223D
Sequence Sorting
dp
,
greedy
,
two pointers
2000
x4077
1209G1
Into Blocks (easy version)
data structures
,
dsu
,
greedy
,
implementation
,
two pointers
2000
x3269
1208B
Uniqueness
binary search
,
brute force
,
implementation
,
two pointers
1500
x10601
1203D2
Remove the Substring (hard version)
binary search
,
greedy
,
implementation
,
two pointers
1700
x7468
1200D
White Lines
brute force
,
data structures
,
dp
,
implementation
,
two pointers
1900
x4148
1198A
MP3
sortings
,
two pointers
1600
x9049
1196D2
RGB Substring (hard version)
data structures
,
dp
,
implementation
,
two pointers
1600
x9761
1195E
OpenStreetMap
data structures
,
two pointers
2100
x3189
1194F
Crossword Expert
combinatorics
,
dp
,
number theory
,
probabilities
,
two pointers
2400
x998
1190D
Tokitsukaze and Strange Rectangle
data structures
,
divide and conquer
,
sortings
,
two pointers
2000
x2311
1190A
Tokitsukaze and Discard Items
implementation
,
two pointers
1400
x9393
1188B
Count Pairs
math
,
matrices
,
number theory
,
two pointers
2300
x4588
1181D
Irrigation
binary search
,
data structures
,
implementation
,
sortings
,
trees
,
two pointers
2200
x2426
1175G
Yet Another Partiton Problem
data structures
,
divide and conquer
,
dp
,
geometry
,
two pointers
3000
x493
1168B
Good Triple
brute force
,
two pointers
1900
x3578
1167E
Range Deleting
binary search
,
combinatorics
,
data structures
,
two pointers
2100
x2695
1166C
A Tale of Two Lands
binary search
,
sortings
,
two pointers
1500
x9680
1158A
The Party and Sweets
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
,
sortings
,
two pointers
1500
x7215
1157F
Maximum Balanced Circle
constructive algorithms
,
dp
,
greedy
,
two pointers
2000
x2661
1156E
Special Segments of Permutation
data structures
,
divide and conquer
,
dsu
,
two pointers
2200
x3114
1156C
Match Points
binary search
,
greedy
,
sortings
,
ternary search
,
two pointers
2000
x6157
1148E
Earth Wind and Fire
constructive algorithms
,
greedy
,
math
,
sortings
,
two pointers
2300
x1685
1148B
Born This Way
binary search
,
brute force
,
two pointers
1600
x7519
1133E
K Balanced Teams
dp
,
sortings
,
two pointers
1800
x5575
1133C
Balanced Team
sortings
,
two pointers
1200
x23457
1131G
Most Dangerous Shark
data structures
,
dp
,
two pointers
2700
x444
1120A
Diana and Liana
greedy
,
implementation
,
two pointers
1900
x1644
1107C
Brutality
greedy
,
sortings
,
two pointers
1300
x10022
1073C
Vasya and Robot
binary search
,
two pointers
1800
x4813
1066B
Heaters
greedy
,
two pointers
1500
x8376
1060C
Maximum Subrectangle
binary search
,
implementation
,
two pointers
1600
x4910
1044A
The Tower is Going Home
binary search
,
two pointers
1700
x2911
1043D
Mysterious Crime
brute force
,
combinatorics
,
math
,
meet-in-the-middle
,
two pointers
1700
x4465
1042D
Petya and Array
data structures
,
divide and conquer
,
two pointers
1800
x6290
1041D
Glider
binary search
,
data structures
,
two pointers
1700
x6007
1041C
Coffee Break
binary search
,
data structures
,
greedy
,
two pointers
1600
x9525
1036D
Vasya and Arrays
greedy
,
two pointers
1600
x9345
1034D
Intervals of Intervals
binary search
,
data structures
,
two pointers
3500
x457
1007A
Reorder the Array
combinatorics
,
data structures
,
math
,
sortings
,
two pointers
1300
x12189
1006C
Three Parts of the Array
binary search
,
data structures
,
two pointers
1200
x21472
989D
A Shade of Moonlight
binary search
,
geometry
,
math
,
sortings
,
two pointers
2500
x517
985E
Pencils and Boxes
binary search
,
data structures
,
dp
,
greedy
,
two pointers
2100
x3692
978C
Letters
binary search
,
implementation
,
two pointers
1000
x25950
965D
Single-use Stones
binary search
,
flows
,
greedy
,
two pointers
1900
x3116
961B
Lecture Sleep
data structures
,
dp
,
implementation
,
two pointers
1200
x21241
958F2
Lightsabers (medium)
binary search
,
two pointers
1800
x1240
954G
Castle Defense
binary search
,
data structures
,
greedy
,
two pointers
2000
x2167
939E
Maximize!
binary search
,
greedy
,
ternary search
,
two pointers
1800
x3164
939C
Convenient For Everybody
binary search
,
two pointers
1600
x4645
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