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Codeforces Round 940 (Div. 2) and CodeCraft-23
3 days
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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
Submit
Status
Standings
Custom test
Problems
#
Name
127B
Canvas Frames
implementation
1000
x8147
997A
Convert to Ones
brute force
,
greedy
,
implementation
,
math
1500
x8145
382C
Arithmetic Progression
implementation
,
sortings
1700
x8141
982B
Bus of Characters
data structures
,
greedy
,
implementation
1300
x8138
591B
Rebranding
implementation
,
strings
1200
x8122
1038D
Slime
dp
,
greedy
,
implementation
1800
x8101
485A
Factory
implementation
,
math
,
matrices
1400
x8079
1027B
Numbers on the Chessboard
implementation
,
math
1200
x8062
985A
Chess Placing
implementation
1100
x8058
1660D
Maximum Product Strikes Back
brute force
,
implementation
,
math
,
two pointers
1600
x8056
1162A
Zoning Restrictions Again
implementation
800
x8045
888C
K-Dominant Character
binary search
,
implementation
,
two pointers
1400
x8045
279C
Ladder
dp
,
implementation
,
two pointers
1700
x8034
820A
Mister B and Book Reading
implementation
900
x8017
960A
Check the string
implementation
1200
x8009
357B
Flag Day
constructive algorithms
,
implementation
1400
x8009
1789C
Serval and Toxel's Arrays
combinatorics
,
dp
,
implementation
,
math
1500
x7999
1358D
The Best Vacation
binary search
,
brute force
,
greedy
,
implementation
,
two pointers
1900
x7990
653A
Bear and Three Balls
brute force
,
implementation
,
sortings
900
x7990
978F
Mentors
binary search
,
data structures
,
implementation
1500
x7983
873A
Chores
implementation
800
x7972
1367D
Task On The Board
constructive algorithms
,
greedy
,
implementation
,
sortings
1800
x7953
821A
Okabe and Future Gadget Laboratory
implementation
800
x7934
1209B
Koala and Lights
implementation
,
math
,
number theory
1300
x7930
12B
Correct Solution?
implementation
,
sortings
1100
x7885
452A
Eevee
brute force
,
implementation
,
strings
1000
x7882
1468N
Waste Sorting
greedy
,
implementation
900
x7874
556B
Case of Fake Numbers
brute force
,
implementation
1100
x7865
560B
Gerald is into Art
constructive algorithms
,
implementation
1200
x7819
1084A
The Fair Nut and Elevator
brute force
,
implementation
1000
x7805
332B
Maximum Absurdity
data structures
,
dp
,
implementation
1500
x7802
544B
Sea and Islands
constructive algorithms
,
implementation
1400
x7796
182D
Common Divisors
brute force
,
hashing
,
implementation
,
math
,
strings
1400
x7787
518B
Tanya and Postcard
greedy
,
implementation
,
strings
1400
x7784
828A
Restaurant Tables
implementation
1200
x7780
302B
Eugeny and Play List
binary search
,
implementation
,
two pointers
1200
x7766
558B
Amr and The Large Array
implementation
1300
x7750
962C
Make a Square
brute force
,
implementation
,
math
1400
x7741
606A
Magic Spheres
implementation
1200
x7735
760A
Petr and a calendar
implementation
,
math
800
x7725
244A
Dividing Orange
implementation
900
x7723
1620E
Replace the Numbers
constructive algorithms
,
data structures
,
dsu
,
implementation
1900
x7711
1491C
Pekora and Trampoline
brute force
,
data structures
,
dp
,
greedy
,
implementation
1700
x7702
544A
Set of Strings
implementation
,
strings
1100
x7698
1101E
Polycarp's New Job
implementation
1500
x7697
729B
Spotlights
dp
,
implementation
1200
x7696
686B
Little Robber Girl's Zoo
constructive algorithms
,
implementation
,
sortings
1100
x7692
1566D2
Seating Arrangements (hard version)
data structures
,
greedy
,
implementation
,
sortings
,
two pointers
1600
x7680
1084B
Kvass and the Fair Nut
greedy
,
implementation
1200
x7677
303A
Lucky Permutation Triple
constructive algorithms
,
implementation
,
math
1300
x7666
292B
Network Topology
graphs
,
implementation
1200
x7663
915B
Browser
implementation
1300
x7633
1560E
Polycarp and String Transformation
binary search
,
implementation
,
sortings
,
strings
1800
x7628
845A
Chess Tourney
implementation
,
sortings
1100
x7619
835C
Star sky
dp
,
implementation
1600
x7618
416C
Booking System
binary search
,
dp
,
greedy
,
implementation
1600
x7612
859A
Declined Finalists
greedy
,
implementation
800
x7602
358A
Dima and Continuous Line
brute force
,
implementation
1400
x7596
596A
Wilbur and Swimming Pool
geometry
,
implementation
1100
x7591
1278C
Berry Jam
data structures
,
dp
,
greedy
,
implementation
1700
x7587
962B
Students in Railway Carriage
constructive algorithms
,
greedy
,
implementation
1300
x7583
920A
Water The Garden
implementation
1000
x7580
908B
New Year and Buggy Bot
brute force
,
implementation
1200
x7568
496C
Removing Columns
brute force
,
constructive algorithms
,
implementation
1500
x7547
479B
Towers
brute force
,
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x7534
903B
The Modcrab
greedy
,
implementation
1200
x7523
677B
Vanya and Food Processor
implementation
,
math
1400
x7520
825A
Binary Protocol
implementation
1100
x7519
699B
One Bomb
implementation
1400
x7502
1084C
The Fair Nut and String
combinatorics
,
dp
,
implementation
1500
x7483
208D
Prizes, Prizes, more Prizes
implementation
1200
x7482
1840E
Character Blocking
data structures
,
hashing
,
implementation
1600
x7461
1535D
Playoff Tournament
data structures
,
dfs and similar
,
dp
,
implementation
,
trees
1800
x7457
762B
USB vs. PS/2
greedy
,
implementation
,
sortings
,
two pointers
1400
x7443
1004C
Sonya and Robots
constructive algorithms
,
implementation
1400
x7419
135A
Replacement
greedy
,
implementation
,
sortings
1300
x7419
1850H
The Third Letter
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
1700
x7416
614A
Link/Cut Tree
brute force
,
implementation
1500
x7393
106A
Card Game
implementation
1000
x7392
1468C
Berpizza
data structures
,
implementation
1400
x7390
873B
Balanced Substring
dp
,
implementation
1500
x7388
1835A
k-th equality
brute force
,
implementation
,
math
1700
x7377
1774D
Same Count One
brute force
,
constructive algorithms
,
greedy
,
implementation
,
two pointers
1600
x7361
318B
Strings of Power
implementation
,
strings
,
two pointers
1300
x7357
424B
Megacity
binary search
,
greedy
,
implementation
,
sortings
1200
x7318
1095D
Circular Dance
implementation
1600
x7302
400B
Inna and New Matrix of Candies
brute force
,
implementation
,
schedules
1200
x7296
985B
Switches and Lamps
implementation
1200
x7294
950B
Intercepted Message
greedy
,
implementation
1100
x7287
13A
Numbers
implementation
,
math
1000
x7286
368A
Sereja and Coat Rack
implementation
1000
x7262
729A
Interview with Oleg
implementation
,
strings
900
x7251
984B
Minesweeper
implementation
1100
x7246
631B
Print Check
constructive algorithms
,
implementation
1200
x7238
581C
Developing Skills
implementation
,
math
,
sortings
1400
x7228
1209C
Paint the Digits
constructive algorithms
,
greedy
,
implementation
1500
x7213
1244D
Paint the Tree
brute force
,
constructive algorithms
,
dp
,
graphs
,
implementation
,
trees
1800
x7202
1061B
Views Matter
greedy
,
implementation
,
sortings
1400
x7202
1114C
Trailing Loves (or L'oeufs?)
brute force
,
implementation
,
math
,
number theory
1700
x7175
379B
New Year Present
constructive algorithms
,
implementation
1200
x7155
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