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Codeforces Round 987 (Div. 2)
11:07:10
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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
961A
Tetris
implementation
900
x10081
959A
Mahmoud and Ehab and the even-odd game
games
,
math
800
x47786
958B1
Maximum Control (easy)
implementation
1000
x3440
954A
Diagonal Walking
implementation
800
x10540
952A
Quirky Quantifiers
math
800
x11286
950A
Left-handers, Right-handers and Ambidexters
implementation
,
math
800
x15353
948A
Protect Sheep
brute force
,
dfs and similar
,
graphs
,
implementation
900
x13886
946A
Partition
greedy
800
x16589
939B
Hamster Farm
implementation
1000
x10626
939A
Love Triangle
graphs
800
x25458
938A
Word Correction
implementation
800
x11487
937A
Olympiad
implementation
,
sortings
800
x15247
935B
Fafa and the Gates
implementation
900
x11628
935A
Fafa and his Company
brute force
,
implementation
800
x43289
932A
Palindromic Supersequence
constructive algorithms
800
x10306
931A
Friends Meeting
brute force
,
greedy
,
implementation
,
math
800
x12213
920A
Water The Garden
implementation
1000
x7781
919A
Supermarket
brute force
,
greedy
,
implementation
800
x16153
918B
Radio Station
implementation
,
strings
900
x16851
918A
Eleven
brute force
,
implementation
800
x17107
916A
Jamie and Alarm Snooze
brute force
,
implementation
,
math
900
x8612
915A
Garden
implementation
900
x14798
914A
Perfect Squares
brute force
,
implementation
,
math
900
x14173
913A
Modular Exponentiation
implementation
,
math
900
x21385
912A
Tricky Alchemy
implementation
800
x13524
910A
The Way to Home
dfs and similar
,
dp
,
greedy
,
implementation
800
x12081
909A
Generate Login
brute force
,
greedy
,
sortings
1000
x9333
908A
New Year and Counting Cards
brute force
,
implementation
800
x14825
903A
Hungry Student Problem
greedy
,
implementation
900
x14647
900A
Find Extra One
geometry
,
implementation
800
x13660
899A
Splitting in Teams
constructive algorithms
,
greedy
,
math
800
x10260
898A
Rounding
implementation
,
math
800
x16286
897A
Scarborough Fair
implementation
800
x14259
894A
QAQ
brute force
,
dp
800
x34936
893B
Beautiful Divisors
brute force
,
implementation
1000
x11480
893A
Chess For Three
implementation
900
x10271
892A
Greed
greedy
,
implementation
900
x13601
888B
Buggy Robot
greedy
1000
x9798
888A
Local Extrema
brute force
,
implementation
800
x11006
887A
Div. 64
implementation
1000
x11288
886B
Vlad and Cafes
1000
x7923
886A
ACM ICPC
brute force
1000
x10334
884A
Book Reading
implementation
800
x10497
879A
Borya's Diagnosis
implementation
900
x9092
876A
Trip For Meal
math
900
x9398
873A
Chores
implementation
800
x8283
870A
Search for Pretty Integers
brute force
,
implementation
900
x10201
868A
Bark to Unlock
brute force
,
implementation
,
strings
900
x8718
867A
Between the Offices
implementation
800
x19361
864B
Polycarp and Letters
brute force
,
implementation
,
strings
1000
x9156
864A
Fair Game
implementation
,
sortings
1000
x11669
863A
Quasi-palindrome
brute force
,
implementation
900
x10255
862A
Mahmoud and Ehab and the MEX
greedy
,
implementation
1000
x9552
859B
Lazy Security Guard
brute force
,
geometry
,
math
1000
x7061
859A
Declined Finalists
greedy
,
implementation
800
x7744
855A
Tom Riddle's Diary
brute force
,
implementation
,
strings
800
x22008
854A
Fraction
brute force
,
constructive algorithms
,
math
800
x13650
851A
Arpa and a research in Mexican wave
implementation
,
math
800
x9787
849A
Odds and Ends
implementation
1000
x9103
847M
Weather Tomorrow
implementation
,
math
1000
x6307
847G
University Classes
implementation
900
x6848
844A
Diversity
greedy
,
implementation
,
strings
1000
x11020
841A
Generous Kefa
brute force
,
implementation
900
x13240
839A
Arya and Bran
implementation
900
x14198
837A
Text Volume
implementation
800
x9469
835A
Key races
math
800
x20332
834A
The Useless Toy
implementation
900
x8686
832A
Sasha and Sticks
games
,
math
800
x20845
831B
Keyboard Layouts
implementation
,
strings
800
x14513
831A
Unimodal Array
implementation
1000
x10299
822B
Crossword solving
brute force
,
implementation
,
strings
1000
x9538
822A
I'm bored with life
implementation
,
math
,
number theory
800
x33368
821A
Okabe and Future Gadget Laboratory
implementation
800
x8260
820A
Mister B and Book Reading
implementation
900
x8176
818A
Diplomas and Certificates
implementation
,
math
800
x7018
816A
Karen and Morning
brute force
,
implementation
1000
x9138
814A
An abandoned sentiment from past
constructive algorithms
,
greedy
,
implementation
,
sortings
900
x10432
811A
Vladik and Courtesy
brute force
,
implementation
800
x11925
810A
Straight <<A>>
implementation
,
math
900
x8846
808A
Lucky Year
implementation
900
x9367
807A
Is it rated?
implementation
,
sortings
900
x20805
805B
3-palindrome
constructive algorithms
1000
x16961
805A
Fake NP
greedy
,
math
1000
x18083
804A
Find Amir
constructive algorithms
,
greedy
,
math
1000
x15510
802G
Fake News (easy)
implementation
,
strings
800
x7057
801B
Valued Keys
constructive algorithms
,
greedy
,
strings
900
x10347
798A
Mike and palindrome
brute force
,
constructive algorithms
,
strings
1000
x21846
796A
Buying A House
brute force
,
implementation
800
x13058
794A
Bank Robbery
brute force
,
implementation
800
x7052
793A
Oleg and shares
implementation
,
math
900
x6834
791A
Bear and Big Brother
implementation
800
x198399
785A
Anton and Polyhedrons
implementation
,
strings
800
x90119
780A
Andryusha and Socks
implementation
800
x19806
779A
Pupils Redistribution
constructive algorithms
,
math
1000
x9329
777A
Shell Game
constructive algorithms
,
implementation
,
math
1000
x10305
776A
A Serial Killer
brute force
,
implementation
,
strings
900
x12161
770A
New Password
*special problem
,
implementation
800
x20006
769A
Year of University Entrance
*special problem
,
implementation
,
sortings
800
x5772
768A
Oath of the Night's Watch
constructive algorithms
,
sortings
900
x27697
766B
Mahmoud and a Triangle
constructive algorithms
,
geometry
,
greedy
,
math
,
number theory
,
sortings
1000
x33160
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