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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
3 days
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implementation
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
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Custom test
Problems
#
Name
680B
Bear and Finding Criminals
constructive algorithms
,
implementation
1000
x23491
1506C
Double-ended Strings
brute force
,
implementation
,
strings
1000
x23502
272A
Dima and Friends
implementation
,
math
1000
x23594
1676D
X-Sum
brute force
,
greedy
,
implementation
1000
x24106
1955B
Progressive Square
constructive algorithms
,
data structures
,
implementation
,
sortings
1000
x24246
1829D
Gold Rush
brute force
,
dfs and similar
,
dp
,
implementation
1000
x24377
1744C
Traffic Light
binary search
,
implementation
,
two pointers
1000
x24436
978C
Letters
binary search
,
implementation
,
two pointers
1000
x24475
352A
Jeff and Digits
brute force
,
implementation
,
math
1000
x24711
102B
Sum of Digits
implementation
1000
x24720
75A
Life Without Zeros
implementation
1000
x25077
237A
Free Cash
implementation
1000
x25857
1373A
Donut Shops
greedy
,
implementation
,
math
1000
x25864
219A
k-String
implementation
,
strings
1000
x26134
1690D
Black and White Stripe
implementation
,
two pointers
1000
x27026
1359B
New Theatre Square
brute force
,
dp
,
greedy
,
implementation
,
two pointers
1000
x27113
118B
Present from Lena
constructive algorithms
,
implementation
1000
x28471
139A
Petr and Book
implementation
1000
x28820
1141A
Game 23
implementation
,
math
1000
x29764
268B
Buttons
implementation
,
math
1000
x30984
450A
Jzzhu and Children
implementation
1000
x32675
499B
Lecture
implementation
,
strings
1000
x37619
577A
Multiplication Table
implementation
,
number theory
1000
x38243
742A
Arpa’s hard exam and Mehrdad’s naive cheat
implementation
,
math
,
number theory
1000
x40104
476A
Dreamoon and Stairs
implementation
,
math
1000
x41354
379A
New Year Candles
implementation
1000
x44620
500A
New Year Transportation
dfs and similar
,
graphs
,
implementation
1000
x50454
339B
Xenia and Ringroad
implementation
1000
x66668
131A
cAPS lOCK
implementation
,
strings
1000
x81573
69A
Young Physicist
implementation
,
math
1000
x155895
118A
String Task
implementation
,
strings
1000
x182157
648A
Наибольший подъем
constructive algorithms
,
implementation
900
x585
130A
Hexagonal numbers
*special problem
,
implementation
900
x1524
412A
Poster
greedy
,
implementation
900
x4313
299B
Ksusha the Squirrel
brute force
,
implementation
900
x5134
48A
Rock-paper-scissors
implementation
,
schedules
900
x5645
45A
Codecraft III
implementation
900
x6355
847G
University Classes
implementation
900
x6532
793A
Oleg and shares
implementation
,
math
900
x6581
10A
Power Consumption Calculation
implementation
900
x6695
137A
Postcards and photos
implementation
900
x6920
729A
Interview with Oleg
implementation
,
strings
900
x7304
244A
Dividing Orange
implementation
900
x7758
1468N
Waste Sorting
greedy
,
implementation
900
x7902
653A
Bear and Three Balls
brute force
,
implementation
,
sortings
900
x8017
820A
Mister B and Book Reading
implementation
900
x8038
424A
Squats
implementation
900
x8210
52A
123-sequence
implementation
900
x8324
916A
Jamie and Alarm Snooze
brute force
,
implementation
,
math
900
x8484
834A
The Useless Toy
implementation
900
x8505
868A
Bark to Unlock
brute force
,
implementation
,
strings
900
x8530
747B
Mammoth's Genome Decoding
implementation
,
strings
900
x8580
810A
Straight <<A>>
implementation
,
math
900
x8720
263B
Squares
greedy
,
implementation
,
sortings
900
x8726
415A
Mashmokh and Lights
implementation
900
x8800
765A
Neverending competitions
implementation
,
math
900
x8868
879A
Borya's Diagnosis
implementation
900
x8965
975A
Aramic script
implementation
,
strings
900
x8978
376A
Lever
implementation
,
math
900
x9037
981A
Antipalindrome
brute force
,
implementation
,
strings
900
x9067
808A
Lucky Year
implementation
900
x9091
622B
The Time
implementation
900
x9105
631A
Interview
brute force
,
implementation
900
x9139
549A
Face Detection
implementation
,
strings
900
x9357
387A
George and Sleep
implementation
900
x9527
44A
Indian Summer
implementation
900
x9529
616A
Comparing Two Long Integers
implementation
,
strings
900
x9581
194A
Exams
implementation
,
math
900
x9649
465A
inc ARG
implementation
900
x9895
586A
Alena's Schedule
implementation
900
x9900
961A
Tetris
implementation
900
x9911
1737A
Ela Sorting Books
greedy
,
implementation
,
strings
900
x9962
870A
Search for Pretty Integers
brute force
,
implementation
900
x9969
863A
Quasi-palindrome
brute force
,
implementation
900
x9987
893A
Chess For Three
implementation
900
x10027
989A
A Blend of Springtime
implementation
,
strings
900
x10165
94A
Restoring Password
implementation
,
strings
900
x10167
814A
An abandoned sentiment from past
constructive algorithms
,
greedy
,
implementation
,
sortings
900
x10263
980A
Links and Pearls
implementation
,
math
900
x10266
745A
Hongcow Learns the Cyclic Shift
implementation
,
strings
900
x10306
168A
Wizards and Demonstration
implementation
,
math
900
x10323
373A
Collecting Beats is Fun
implementation
900
x10328
1150B
Tiling Challenge
greedy
,
implementation
900
x10796
369A
Valera and Plates
greedy
,
implementation
900
x10811
63A
Sinking Ship
implementation
,
sortings
,
strings
900
x10909
1004A
Sonya and Hotels
implementation
900
x10988
408A
Line to Cashier
implementation
900
x11018
935B
Fafa and the Gates
implementation
900
x11369
545A
Toy Cars
implementation
900
x11442
611A
New Year and Days
implementation
900
x11561
764B
Timofey and cubes
constructive algorithms
,
implementation
900
x11630
1169A
Circle Metro
implementation
,
math
900
x11697
776A
A Serial Killer
brute force
,
implementation
,
strings
900
x11850
1011A
Stages
greedy
,
implementation
,
sortings
900
x11947
11A
Increasing Sequence
constructive algorithms
,
implementation
,
math
900
x12456
697A
Pineapple Incident
implementation
,
math
900
x12599
841A
Generous Kefa
brute force
,
implementation
900
x12943
892A
Greed
greedy
,
implementation
900
x13219
948A
Protect Sheep
brute force
,
dfs and similar
,
graphs
,
implementation
900
x13408
914A
Perfect Squares
brute force
,
implementation
,
math
900
x13818
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