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Refact.ai Match 1 (Codeforces Round 985)
3 days
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combine-tags-by-or
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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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Status
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Custom test
Problems
#
Name
952A
Quirky Quantifiers
math
800
x11274
950A
Left-handers, Right-handers and Ambidexters
implementation
,
math
800
x15322
948A
Protect Sheep
brute force
,
dfs and similar
,
graphs
,
implementation
900
x13849
946A
Partition
greedy
800
x16572
939B
Hamster Farm
implementation
1000
x10617
939A
Love Triangle
graphs
800
x25392
938A
Word Correction
implementation
800
x11481
937A
Olympiad
implementation
,
sortings
800
x15230
935B
Fafa and the Gates
implementation
900
x11594
935A
Fafa and his Company
brute force
,
implementation
800
x43164
932A
Palindromic Supersequence
constructive algorithms
800
x10304
931A
Friends Meeting
brute force
,
greedy
,
implementation
,
math
800
x12196
920A
Water The Garden
implementation
1000
x7772
919A
Supermarket
brute force
,
greedy
,
implementation
800
x16146
918B
Radio Station
implementation
,
strings
900
x16766
918A
Eleven
brute force
,
implementation
800
x17092
916A
Jamie and Alarm Snooze
brute force
,
implementation
,
math
900
x8606
915A
Garden
implementation
900
x14747
914A
Perfect Squares
brute force
,
implementation
,
math
900
x14152
913A
Modular Exponentiation
implementation
,
math
900
x21346
912A
Tricky Alchemy
implementation
800
x13508
910A
The Way to Home
dfs and similar
,
dp
,
greedy
,
implementation
800
x12043
909A
Generate Login
brute force
,
greedy
,
sortings
1000
x9327
908A
New Year and Counting Cards
brute force
,
implementation
800
x14821
903A
Hungry Student Problem
greedy
,
implementation
900
x14628
900A
Find Extra One
geometry
,
implementation
800
x13629
899A
Splitting in Teams
constructive algorithms
,
greedy
,
math
800
x10253
898A
Rounding
implementation
,
math
800
x16233
897A
Scarborough Fair
implementation
800
x14244
894A
QAQ
brute force
,
dp
800
x34700
893B
Beautiful Divisors
brute force
,
implementation
1000
x11465
893A
Chess For Three
implementation
900
x10265
892A
Greed
greedy
,
implementation
900
x13561
888B
Buggy Robot
greedy
1000
x9793
888A
Local Extrema
brute force
,
implementation
800
x10991
887A
Div. 64
implementation
1000
x11286
886B
Vlad and Cafes
1000
x7915
886A
ACM ICPC
brute force
1000
x10327
884A
Book Reading
implementation
800
x10485
879A
Borya's Diagnosis
implementation
900
x9090
876A
Trip For Meal
math
900
x9393
873A
Chores
implementation
800
x8277
870A
Search for Pretty Integers
brute force
,
implementation
900
x10200
868A
Bark to Unlock
brute force
,
implementation
,
strings
900
x8705
867A
Between the Offices
implementation
800
x19343
864B
Polycarp and Letters
brute force
,
implementation
,
strings
1000
x9150
864A
Fair Game
implementation
,
sortings
1000
x11662
863A
Quasi-palindrome
brute force
,
implementation
900
x10251
862A
Mahmoud and Ehab and the MEX
greedy
,
implementation
1000
x9538
859B
Lazy Security Guard
brute force
,
geometry
,
math
1000
x7057
859A
Declined Finalists
greedy
,
implementation
800
x7738
855A
Tom Riddle's Diary
brute force
,
implementation
,
strings
800
x21953
854A
Fraction
brute force
,
constructive algorithms
,
math
800
x13642
851A
Arpa and a research in Mexican wave
implementation
,
math
800
x9782
849A
Odds and Ends
implementation
1000
x9094
847M
Weather Tomorrow
implementation
,
math
1000
x6298
847G
University Classes
implementation
900
x6837
844A
Diversity
greedy
,
implementation
,
strings
1000
x11015
841A
Generous Kefa
brute force
,
implementation
900
x13210
839A
Arya and Bran
implementation
900
x14178
837A
Text Volume
implementation
800
x9450
835A
Key races
math
800
x20322
834A
The Useless Toy
implementation
900
x8679
832A
Sasha and Sticks
games
,
math
800
x20810
831B
Keyboard Layouts
implementation
,
strings
800
x14502
831A
Unimodal Array
implementation
1000
x10291
822B
Crossword solving
brute force
,
implementation
,
strings
1000
x9532
822A
I'm bored with life
implementation
,
math
,
number theory
800
x33269
821A
Okabe and Future Gadget Laboratory
implementation
800
x8248
820A
Mister B and Book Reading
implementation
900
x8173
818A
Diplomas and Certificates
implementation
,
math
800
x6978
816A
Karen and Morning
brute force
,
implementation
1000
x9134
814A
An abandoned sentiment from past
constructive algorithms
,
greedy
,
implementation
,
sortings
900
x10406
811A
Vladik and Courtesy
brute force
,
implementation
800
x11921
810A
Straight <<A>>
implementation
,
math
900
x8840
808A
Lucky Year
implementation
900
x9358
807A
Is it rated?
implementation
,
sortings
900
x20779
805B
3-palindrome
constructive algorithms
1000
x16933
805A
Fake NP
greedy
,
math
1000
x18067
804A
Find Amir
constructive algorithms
,
greedy
,
math
1000
x15503
802G
Fake News (easy)
implementation
,
strings
800
x7030
801B
Valued Keys
constructive algorithms
,
greedy
,
strings
900
x10332
798A
Mike and palindrome
brute force
,
constructive algorithms
,
strings
1000
x21821
796A
Buying A House
brute force
,
implementation
800
x13049
794A
Bank Robbery
brute force
,
implementation
800
x7048
793A
Oleg and shares
implementation
,
math
900
x6823
791A
Bear and Big Brother
implementation
800
x197409
785A
Anton and Polyhedrons
implementation
,
strings
800
x89740
780A
Andryusha and Socks
implementation
800
x19748
779A
Pupils Redistribution
constructive algorithms
,
math
1000
x9328
777A
Shell Game
constructive algorithms
,
implementation
,
math
1000
x10294
776A
A Serial Killer
brute force
,
implementation
,
strings
900
x12149
770A
New Password
*special problem
,
implementation
800
x19955
769A
Year of University Entrance
*special problem
,
implementation
,
sortings
800
x5765
768A
Oath of the Night's Watch
constructive algorithms
,
sortings
900
x27635
766B
Mahmoud and a Triangle
constructive algorithms
,
geometry
,
greedy
,
math
,
number theory
,
sortings
1000
x33075
766A
Mahmoud and Longest Uncommon Subsequence
constructive algorithms
,
strings
1000
x30624
765A
Neverending competitions
implementation
,
math
900
x9019
764B
Timofey and cubes
constructive algorithms
,
implementation
900
x11874
764A
Taymyr is calling you
brute force
,
implementation
,
math
800
x16359
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