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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
15:00:45
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→ Filter Problems
Difficulty:
—
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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Status
Standings
Custom test
Problems
#
Name
915A
Garden
implementation
900
x14819
914B
Conan and Agasa play a Card Game
games
,
greedy
,
implementation
1200
x8636
914A
Perfect Squares
brute force
,
implementation
,
math
900
x14201
913B
Christmas Spruce
implementation
,
trees
1200
x16180
913A
Modular Exponentiation
implementation
,
math
900
x21403
912A
Tricky Alchemy
implementation
800
x13539
911E
Stack Sorting
constructive algorithms
,
data structures
,
greedy
,
implementation
2000
x2562
911B
Two Cakes
binary search
,
brute force
,
implementation
1200
x11469
911A
Nearest Minimums
implementation
1100
x11508
910B
Door Frames
greedy
,
implementation
1600
x1710
910A
The Way to Home
dfs and similar
,
dp
,
greedy
,
implementation
800
x12120
909D
Colorful Points
data structures
,
greedy
,
implementation
2100
x1949
908F
New Year and Rainbow Roads
graphs
,
greedy
,
implementation
2400
x1401
908C
New Year and Curling
brute force
,
geometry
,
implementation
,
math
1500
x6934
908B
New Year and Buggy Bot
brute force
,
implementation
1200
x7672
908A
New Year and Counting Cards
brute force
,
implementation
800
x14830
907B
Tic-Tac-Toe
implementation
1400
x4069
907A
Masha and Bears
brute force
,
implementation
1300
x5710
906A
Shockers
implementation
,
strings
1600
x4142
903E
Swapping Characters
brute force
,
hashing
,
implementation
,
strings
2200
x1481
903B
The Modcrab
greedy
,
implementation
1200
x7769
903A
Hungry Student Problem
greedy
,
implementation
900
x14659
902A
Visiting a Friend
greedy
,
implementation
1100
x9857
900A
Find Extra One
geometry
,
implementation
800
x13670
899E
Segments Removal
data structures
,
dsu
,
flows
,
implementation
,
two pointers
2000
x3098
899B
Months and Years
implementation
1200
x5901
898C
Phone Numbers
implementation
,
strings
1400
x5308
898B
Proper Nutrition
brute force
,
implementation
,
number theory
1100
x9611
898A
Rounding
implementation
,
math
800
x16296
897A
Scarborough Fair
implementation
800
x14295
895A
Pizza Separation
brute force
,
implementation
1200
x6575
893D
Credit Card
data structures
,
dp
,
greedy
,
implementation
1900
x3074
893B
Beautiful Divisors
brute force
,
implementation
1000
x11495
893A
Chess For Three
implementation
900
x10278
892B
Wrath
greedy
,
implementation
,
two pointers
1200
x9050
892A
Greed
greedy
,
implementation
900
x13612
888C
K-Dominant Character
binary search
,
implementation
,
two pointers
1400
x8267
888A
Local Extrema
brute force
,
implementation
800
x11053
887C
Solution for Cube
brute force
,
implementation
1500
x2900
887B
Cubes for Masha
brute force
,
implementation
1300
x5642
887A
Div. 64
implementation
1000
x11293
886D
Restoration of string
constructive algorithms
,
graphs
,
implementation
2000
x1803
886C
Petya and Catacombs
dsu
,
greedy
,
implementation
,
trees
1300
x5483
884B
Japanese Crosswords Strike Back
implementation
1100
x6888
884A
Book Reading
implementation
800
x10506
883K
Road Widening
constructive algorithms
,
greedy
,
implementation
1800
x1103
883H
Palindromic Cut
brute force
,
implementation
,
strings
1800
x1621
883F
Lost in Transliteration
implementation
1300
x2283
883E
Field of Wonders
implementation
,
strings
1500
x1913
883C
Downloading B++
binary search
,
implementation
2300
x629
883A
Automatic Door
implementation
2200
x594
879B
Table Tennis
data structures
,
implementation
1200
x12488
879A
Borya's Diagnosis
implementation
900
x9095
878B
Teams Formation
data structures
,
implementation
2300
x1071
877A
Alex and broken contest
implementation
,
strings
1100
x10897
876B
Divisiblity of Differences
implementation
,
math
,
number theory
1300
x9222
875C
National Property
2-sat
,
dfs and similar
,
graphs
,
implementation
2100
x2136
875B
Sorting the Coins
dsu
,
implementation
,
sortings
,
two pointers
1500
x5213
873B
Balanced Substring
dp
,
implementation
1500
x7853
873A
Chores
implementation
800
x8336
870A
Search for Pretty Integers
brute force
,
implementation
900
x10211
869A
The Artful Expedient
brute force
,
implementation
1100
x9470
868D
Huge Strings
bitmasks
,
brute force
,
dp
,
implementation
,
strings
2200
x926
868B
Race Against Time
implementation
1400
x3686
868A
Bark to Unlock
brute force
,
implementation
,
strings
900
x8723
867A
Between the Offices
implementation
800
x19380
864D
Make a Permutation!
greedy
,
implementation
,
math
1500
x6013
864C
Bus
greedy
,
implementation
,
math
1500
x5866
864B
Polycarp and Letters
brute force
,
implementation
,
strings
1000
x9169
864A
Fair Game
implementation
,
sortings
1000
x11679
863D
Yet Another Array Queries Problem
data structures
,
implementation
1800
x3298
863C
1-2-3
graphs
,
implementation
1800
x2519
863A
Quasi-palindrome
brute force
,
implementation
900
x10259
862A
Mahmoud and Ehab and the MEX
greedy
,
implementation
1000
x9563
859A
Declined Finalists
greedy
,
implementation
800
x7788
858E
Tests Renumeration
greedy
,
implementation
2200
x510
858D
Polycarp's phone book
data structures
,
implementation
,
sortings
1600
x3855
858C
Did you mean...
dp
,
greedy
,
implementation
1500
x5636
858B
Which floor?
brute force
,
implementation
1500
x3754
855A
Tom Riddle's Diary
brute force
,
implementation
,
strings
800
x22077
852G
Bathroom terminal
implementation
1700
x1291
852A
Digits
brute force
,
implementation
,
math
2500
x389
851A
Arpa and a research in Mexican wave
implementation
,
math
800
x9792
850B
Arpa and a list of numbers
implementation
,
number theory
2100
x2033
849A
Odds and Ends
implementation
1000
x9110
848B
Rooter's Song
constructive algorithms
,
data structures
,
geometry
,
implementation
,
sortings
,
two pointers
1900
x1905
847M
Weather Tomorrow
implementation
,
math
1000
x6309
847K
Travel Cards
greedy
,
implementation
,
sortings
1800
x1696
847I
Noise Level
dfs and similar
,
implementation
,
math
1900
x1534
847G
University Classes
implementation
900
x6851
847A
Union of Doubly Linked Lists
implementation
1500
x3388
846A
Curriculum Vitae
brute force
,
implementation
1500
x4267
845B
Luba And The Ticket
brute force
,
greedy
,
implementation
1600
x5044
845A
Chess Tourney
implementation
,
sortings
1100
x7799
844A
Diversity
greedy
,
implementation
,
strings
1000
x11026
843A
Sorting by Subsequences
dfs and similar
,
dsu
,
implementation
,
math
,
sortings
1400
x5682
841A
Generous Kefa
brute force
,
implementation
900
x13252
839B
Game of the Rows
brute force
,
greedy
,
implementation
1900
x3330
839A
Arya and Bran
implementation
900
x14209
837E
Vasya's Function
binary search
,
implementation
,
math
2100
x1802
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