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Refact.ai Match 1 (Codeforces Round 985)
4 days
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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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Problems
#
Name
579A
Raising Bacteria
bitmasks
1000
x61717
577A
Multiplication Table
implementation
,
number theory
1000
x40026
572A
Arrays
sortings
900
x16635
567A
Lineland Mail
greedy
,
implementation
900
x32391
560A
Currency System in Geraldion
implementation
,
sortings
1000
x17204
556A
Case of the Zeros and Ones
greedy
900
x40180
554A
Kyoya and Photobooks
brute force
,
math
,
strings
900
x13273
552A
Vanya and Table
implementation
,
math
1000
x9589
551A
GukiZ and Contest
brute force
,
implementation
,
sortings
800
x16398
549A
Face Detection
implementation
,
strings
900
x9474
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x183737
545A
Toy Cars
implementation
900
x11609
540A
Combination Lock
implementation
800
x32617
535A
Tavas and Nafas
brute force
,
implementation
1000
x12213
520A
Pangram
implementation
,
strings
800
x98251
519A
A and B and Chess
implementation
900
x19035
515A
Drazil and Date
math
1000
x20351
513A
Game
constructive algorithms
,
math
800
x20363
510A
Fox And Snake
implementation
800
x84512
509A
Maximum in Table
brute force
,
implementation
800
x38566
507A
Amr and Music
greedy
,
implementation
,
sortings
1000
x18496
501A
Contest
implementation
900
x22831
500A
New Year Transportation
dfs and similar
,
graphs
,
implementation
1000
x53448
499B
Lecture
implementation
,
strings
1000
x39512
499A
Watching a movie
greedy
,
implementation
1000
x13969
496A
Minimum Difficulty
brute force
,
implementation
,
math
900
x16440
492A
Vanya and Cubes
implementation
800
x50942
491A
Up the hill
constructive algorithms
,
implementation
1000
x2949
490A
Team Olympiad
greedy
,
implementation
,
sortings
800
x59769
486A
Calculating Function
implementation
,
math
800
x119743
479A
Expression
brute force
,
math
1000
x94779
476A
Dreamoon and Stairs
implementation
,
math
1000
x44181
474A
Keyboard
implementation
900
x45898
472A
Design Tutorial: Learn from Math
math
,
number theory
800
x60370
469A
I Wanna Be the Guy
greedy
,
implementation
800
x98502
467A
George and Accommodation
implementation
800
x123259
465B
Inbox (100500)
implementation
1000
x10438
465A
inc ARG
implementation
900
x10040
462A
Appleman and Easy Task
brute force
,
implementation
1000
x16904
460A
Vasya and Socks
brute force
,
implementation
,
math
900
x46279
454A
Little Pony and Crystal Mine
implementation
800
x14874
452A
Eevee
brute force
,
implementation
,
strings
1000
x8017
451A
Game With Sticks
implementation
900
x66071
450A
Jzzhu and Children
implementation
1000
x34927
448A
Rewards
implementation
800
x24378
447B
DZY Loves Strings
greedy
,
implementation
1000
x20312
447A
DZY Loves Hash
implementation
800
x9606
443A
Anton and Letters
constructive algorithms
,
implementation
800
x90460
441A
Valera and Antique Items
implementation
1000
x18522
440A
Forgotten Episode
implementation
800
x7425
439A
Devu, the Singer and Churu, the Joker
greedy
,
implementation
900
x25364
435A
Queue on Bus Stop
implementation
1000
x10181
432A
Choosing Teams
greedy
,
implementation
,
sortings
800
x60130
431A
Black Square
implementation
800
x55361
427A
Police Recruits
implementation
800
x78883
426A
Sereja and Mugs
implementation
800
x9243
424A
Squats
implementation
900
x8500
421A
Pasha and Hamsters
constructive algorithms
,
implementation
800
x6076
420A
Start Up
implementation
1000
x6240
415A
Mashmokh and Lights
implementation
900
x9011
412B
Network Configuration
greedy
,
sortings
900
x5424
412A
Poster
greedy
,
implementation
900
x4462
411A
Password Check
*special problem
,
implementation
800
x7268
408A
Line to Cashier
implementation
900
x11271
405A
Gravity Flip
greedy
,
implementation
,
sortings
900
x102144
404A
Valera and X
implementation
1000
x24028
401A
Vanya and Cards
implementation
,
math
800
x16305
400A
Inna and Choose Options
implementation
1000
x6525
389A
Fox and Number Game
greedy
,
math
1000
x14077
387A
George and Sleep
implementation
900
x9700
386A
Second-Price Auction
implementation
800
x6413
385A
Bear and Raspberry
brute force
,
greedy
,
implementation
1000
x16502
384A
Coder
implementation
800
x16191
381A
Sereja and Dima
greedy
,
implementation
,
two pointers
800
x66709
379A
New Year Candles
implementation
1000
x46508
378A
Playing with Dice
brute force
800
x24080
376A
Lever
implementation
,
math
900
x9344
373A
Collecting Beats is Fun
implementation
900
x10715
371A
K-Periodic Array
greedy
,
implementation
,
math
1000
x6113
369A
Valera and Plates
greedy
,
implementation
900
x11058
368A
Sereja and Coat Rack
implementation
1000
x7517
363A
Soroban
implementation
800
x10785
361A
Levko and Table
constructive algorithms
,
implementation
800
x16724
359A
Table
constructive algorithms
,
greedy
,
implementation
1000
x8559
357A
Group of Students
brute force
,
greedy
,
implementation
1000
x6850
352A
Jeff and Digits
brute force
,
implementation
,
math
1000
x25785
344A
Magnets
implementation
800
x121582
339B
Xenia and Ringroad
implementation
1000
x70205
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x216146
337A
Puzzles
greedy
900
x80193
336A
Vasily the Bear and Triangle
implementation
,
math
1000
x10112
334A
Candy Bags
implementation
1000
x18677
330A
Cakeminator
brute force
,
implementation
800
x28600
322A
Ciel and Dancing
greedy
1000
x8224
320A
Magic Numbers
brute force
,
greedy
900
x37191
318A
Even Odds
math
900
x115160
313A
Ilya and Bank Account
implementation
,
number theory
900
x56603
306A
Candies
implementation
800
x7033
302A
Eugeny and Array
implementation
800
x9095
299B
Ksusha the Squirrel
brute force
,
implementation
900
x5336
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