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Codeforces Round 940 (Div. 2) and CodeCraft-23
2 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
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Custom test
Problems
#
Name
48B
Land Lot
brute force
,
implementation
1200
x2597
172B
Pseudorandom Sequence Period
*special problem
,
implementation
,
number theory
1200
x2684
69B
Bets
greedy
,
implementation
1200
x3180
55A
Flea travel
implementation
,
math
1200
x3325
645A
Amity Assessment
brute force
,
constructive algorithms
,
implementation
1200
x3351
38B
Chess
brute force
,
implementation
,
math
1200
x3375
15A
Cottage Village
implementation
,
sortings
1200
x3549
1578E
Easy Scheduling
implementation
,
math
1200
x3722
88A
Chord
brute force
,
implementation
1200
x3733
134A
Average Numbers
brute force
,
implementation
1200
x3789
33A
What is for dinner?
greedy
,
implementation
1200
x3835
412C
Pattern
implementation
,
strings
1200
x3845
717C
Potions Homework
implementation
,
sortings
1200
x3860
774C
Maximum Number
*special problem
,
constructive algorithms
,
greedy
,
implementation
1200
x4015
112B
Petya and Square
implementation
,
math
1200
x4057
203A
Two Problems
brute force
,
implementation
1200
x4111
1075B
Taxi drivers and Lyft
implementation
,
sortings
1200
x4183
401B
Sereja and Contests
greedy
,
implementation
,
math
1200
x4375
234A
Lefthanders and Righthanders
implementation
1200
x4375
63B
Settlers' Training
implementation
1200
x4702
255B
Code Parsing
implementation
1200
x4856
216A
Tiling with Hexagons
implementation
,
math
1200
x4906
143B
Help Kingdom of Far Far Away 2
implementation
,
strings
1200
x4908
725B
Food on the Plane
implementation
,
math
1200
x5085
9B
Running Student
brute force
,
geometry
,
implementation
1200
x5171
1510K
King's Task
brute force
,
graphs
,
implementation
1200
x5250
5B
Center Alignment
implementation
,
strings
1200
x5517
593A
2Char
brute force
,
implementation
1200
x5667
899B
Months and Years
implementation
1200
x5745
639A
Bear and Displayed Friends
implementation
1200
x5797
817A
Treasure Hunt
implementation
,
math
,
number theory
1200
x6048
812A
Sagheer and Crossroads
implementation
1200
x6156
1043B
Lost Array
implementation
1200
x6192
151B
Phone Numbers
implementation
,
strings
1200
x6207
592A
PawnChess
implementation
1200
x6295
722B
Verse Pattern
implementation
,
strings
1200
x6340
811B
Vladik and Complicated Book
implementation
,
sortings
1200
x6424
895A
Pizza Separation
brute force
,
implementation
1200
x6444
59B
Fortune Telling
implementation
,
number theory
1200
x6630
366B
Dima and To-do List
brute force
,
implementation
1200
x6710
612B
HDD is Outdated Technology
implementation
,
math
1200
x6808
315B
Sereja and Array
implementation
1200
x6828
131B
Opposites Attract
implementation
,
math
1200
x6841
145A
Lucky Conversion
greedy
,
implementation
1200
x6949
931B
World Cup
constructive algorithms
,
implementation
1200
x7017
920B
Tea Queue
implementation
1200
x7062
379B
New Year Present
constructive algorithms
,
implementation
1200
x7155
631B
Print Check
constructive algorithms
,
implementation
1200
x7238
985B
Switches and Lamps
implementation
1200
x7294
400B
Inna and New Matrix of Candies
brute force
,
implementation
,
schedules
1200
x7297
424B
Megacity
binary search
,
greedy
,
implementation
,
sortings
1200
x7318
208D
Prizes, Prizes, more Prizes
implementation
1200
x7482
903B
The Modcrab
greedy
,
implementation
1200
x7523
908B
New Year and Buggy Bot
brute force
,
implementation
1200
x7568
292B
Network Topology
graphs
,
implementation
1200
x7663
1084B
Kvass and the Fair Nut
greedy
,
implementation
1200
x7677
729B
Spotlights
dp
,
implementation
1200
x7696
606A
Magic Spheres
implementation
1200
x7735
302B
Eugeny and Play List
binary search
,
implementation
,
two pointers
1200
x7766
828A
Restaurant Tables
implementation
1200
x7780
560B
Gerald is into Art
constructive algorithms
,
implementation
1200
x7819
960A
Check the string
implementation
1200
x8009
1027B
Numbers on the Chessboard
implementation
,
math
1200
x8062
591B
Rebranding
implementation
,
strings
1200
x8122
1051A
Vasya And Password
greedy
,
implementation
,
strings
1200
x8300
1082A
Vasya and Book
implementation
,
math
1200
x8404
914B
Conan and Agasa play a Card Game
games
,
greedy
,
implementation
1200
x8484
1023A
Single Wildcard Pattern Matching
brute force
,
implementation
,
strings
1200
x8501
660A
Co-prime Array
greedy
,
implementation
,
math
,
number theory
1200
x8502
934B
A Prosperous Lot
constructive algorithms
,
implementation
1200
x8509
754A
Lesha and array splitting
constructive algorithms
,
greedy
,
implementation
1200
x8524
1121B
Mike and Children
brute force
,
implementation
1200
x8553
1000A
Codehorses T-shirts
greedy
,
implementation
1200
x8566
583B
Robot's Task
greedy
,
implementation
1200
x8608
133B
Unary
implementation
1200
x8611
892B
Wrath
greedy
,
implementation
,
two pointers
1200
x8648
408B
Garland
implementation
1200
x8818
708A
Letters Cyclic Shift
constructive algorithms
,
greedy
,
implementation
,
strings
1200
x8837
574A
Bear and Elections
greedy
,
implementation
1200
x8957
1017B
The Bits
implementation
,
math
1200
x9029
959B
Mahmoud and Ehab and the message
dsu
,
greedy
,
implementation
1200
x9061
463A
Caisa and Sugar
brute force
,
implementation
1200
x9087
1099C
Postcard
constructive algorithms
,
implementation
1200
x9342
1191B
Tokitsukaze and Mahjong
brute force
,
implementation
1200
x9406
732C
Sanatorium
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
1200
x9461
385B
Bear and Strings
brute force
,
greedy
,
implementation
,
math
,
strings
1200
x9488
1011B
Planning The Expedition
binary search
,
brute force
,
implementation
1200
x9786
489A
SwapSort
greedy
,
implementation
,
sortings
1200
x9792
31A
Worms Evolution
implementation
1200
x9869
222A
Shooshuns and Sequence
brute force
,
implementation
1200
x10315
431B
Shower Line
brute force
,
implementation
1200
x10450
1091B
New Year and the Treasure Geolocation
brute force
,
constructive algorithms
,
greedy
,
implementation
1200
x10463
264A
Escape from Stones
constructive algorithms
,
data structures
,
implementation
,
two pointers
1200
x10578
911B
Two Cakes
binary search
,
brute force
,
implementation
1200
x10828
743A
Vladik and flights
constructive algorithms
,
greedy
,
implementation
1200
x10840
1140B
Good String
implementation
,
strings
1200
x11128
1015B
Obtaining the String
implementation
1200
x11267
659C
Tanya and Toys
greedy
,
implementation
1200
x11373
432B
Football Kit
brute force
,
greedy
,
implementation
1200
x11431
1118B
Tanya and Candies
implementation
1200
x11612
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