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Codeforces Round 940 (Div. 2) and CodeCraft-23
2 days
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Difficulty:
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math
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
1554B
Cobb
bitmasks
,
brute force
,
greedy
,
math
1700
x12374
276D
Little Girl and Maximum XOR
bitmasks
,
dp
,
greedy
,
implementation
,
math
1700
x12886
1538D
Another Problem About Dividing Numbers
constructive algorithms
,
math
,
number theory
1700
x12979
1359C
Mixing Water
binary search
,
math
1700
x13227
100E
Lamps in a Line
*special problem
,
math
1600
x265
64C
Table
*special problem
,
greedy
,
implementation
,
math
1600
x331
40B
Repaintings
math
1600
x1107
139B
Wallpaper
implementation
,
math
1600
x1270
73A
The Elder Trolls IV: Oblivon
greedy
,
math
1600
x1296
86A
Reflection
math
1600
x1337
958E1
Guard Duty (easy)
brute force
,
geometry
,
greedy
,
math
1600
x1466
167A
Wizards and Trolleybuses
implementation
,
math
1600
x2009
209A
Multicolored Marbles
dp
,
math
1600
x2228
135B
Rectangle and Square
brute force
,
geometry
,
math
1600
x2289
373B
Making Sequences is Fun
binary search
,
implementation
,
math
1600
x2428
142A
Help Farmer
brute force
,
math
1600
x2557
272D
Dima and Two Sequences
combinatorics
,
math
,
sortings
1600
x2580
630G
Challenge Pennants
combinatorics
,
math
1600
x2612
319A
Malek Dance Club
combinatorics
,
math
1600
x2752
595B
Pasha and Phone
binary search
,
math
1600
x2893
23B
Party
constructive algorithms
,
graphs
,
math
1600
x3187
107B
Basketball Team
combinatorics
,
dp
,
math
,
probabilities
1600
x3272
444A
DZY Loves Physics
greedy
,
math
1600
x3362
269A
Magical Boxes
greedy
,
math
1600
x3466
746C
Tram
constructive algorithms
,
implementation
,
math
1600
x3679
150B
Quantity of Strings
combinatorics
,
dfs and similar
,
graphs
,
math
1600
x3941
1056B
Divide Candies
math
,
number theory
1600
x4061
340C
Tourist Problem
combinatorics
,
implementation
,
math
1600
x4096
154B
Colliders
math
,
number theory
1600
x4215
11B
Jumping Jack
math
1600
x4254
626C
Block Towers
brute force
,
greedy
,
math
,
number theory
1600
x4284
597A
Divisibility
math
1600
x4406
992C
Nastya and a Wardrobe
math
1600
x4505
405C
Unusual Product
implementation
,
math
1600
x4562
1423K
Lonely Numbers
binary search
,
math
,
number theory
,
two pointers
1600
x4644
375A
Divisible by Seven
math
,
number theory
1600
x4645
353C
Find Maximum
implementation
,
math
,
number theory
1600
x4705
407A
Triangle
brute force
,
geometry
,
implementation
,
math
1600
x4737
337C
Quiz
binary search
,
greedy
,
math
,
matrices
,
number theory
1600
x4761
214B
Hometask
brute force
,
constructive algorithms
,
greedy
,
math
1600
x4872
534C
Polycarpus' Dice
math
1600
x4921
568A
Primes or Palindromes?
brute force
,
implementation
,
math
,
number theory
1600
x4998
424C
Magic Formulas
math
1600
x5173
1062C
Banh-mi
greedy
,
implementation
,
math
1600
x5303
1085C
Connect Three
implementation
,
math
1600
x5358
741A
Arpa's loud Owf and Mehrdad's evil plan
dfs and similar
,
math
1600
x5393
476C
Dreamoon and Sums
math
1600
x5400
712C
Memory and De-Evolution
greedy
,
math
1600
x5497
715A
Plus and Square Root
constructive algorithms
,
math
1600
x5540
1036B
Diagonal Walking v.2
math
1600
x5594
573B
Bear and Blocks
binary search
,
data structures
,
dp
,
math
1600
x5621
525C
Ilya and Sticks
greedy
,
math
,
sortings
1600
x5690
500C
New Year Book Reading
constructive algorithms
,
greedy
,
implementation
,
math
1600
x5737
538C
Tourist's Notes
binary search
,
brute force
,
greedy
,
implementation
,
math
1600
x5753
197A
Plate Game
constructive algorithms
,
games
,
math
1600
x6021
992B
Nastya Studies Informatics
math
,
number theory
1600
x6072
71C
Round Table Knights
dp
,
math
,
number theory
1600
x6205
495B
Modular Equations
math
,
number theory
1600
x6431
750C
New Year and Rating
binary search
,
greedy
,
math
1600
x6482
1932E
Final Countdown
implementation
,
math
,
number theory
1600
x6521
1787C
Remove the Bracket
dp
,
greedy
,
math
1600
x6657
1059C
Sequence Transformation
constructive algorithms
,
math
1600
x6966
1811D
Umka and a Long Flight
constructive algorithms
,
implementation
,
math
1600
x6981
817C
Really Big Numbers
binary search
,
brute force
,
dp
,
math
1600
x6990
1029C
Maximal Intersection
greedy
,
math
,
sortings
1600
x7079
1238C
Standard Free2play
dp
,
greedy
,
math
1600
x7089
1806C
Sequence Master
brute force
,
constructive algorithms
,
math
1600
x7145
785C
Anton and Fairy Tale
binary search
,
math
1600
x7162
1928C
Physical Education Lesson
brute force
,
math
,
number theory
1600
x7283
735C
Tennis Championship
combinatorics
,
constructive algorithms
,
greedy
,
math
1600
x7328
603A
Alternative Thinking
dp
,
greedy
,
math
1600
x7524
888D
Almost Identity Permutations
combinatorics
,
dp
,
math
1600
x7566
1165E
Two Arrays and Sum of Functions
greedy
,
math
,
sortings
1600
x7668
1284C
New Year and Permutation
combinatorics
,
math
1600
x7684
1452D
Radio Towers
combinatorics
,
dp
,
math
1600
x7739
1615C
Menorah
brute force
,
graphs
,
greedy
,
math
1600
x8019
1660D
Maximum Product Strikes Back
brute force
,
implementation
,
math
,
two pointers
1600
x8057
1151D
Stas and the Queue at the Buffet
greedy
,
math
,
sortings
1600
x8073
1766D
Lucky Chains
math
,
number theory
1600
x8285
1795D
Triangle Coloring
combinatorics
,
math
1600
x8382
346A
Alice and Bob
games
,
math
,
number theory
1600
x8436
343A
Rational Resistance
math
,
number theory
1600
x8490
1956C
Nene's Magical Matrix
constructive algorithms
,
greedy
,
math
1600
x8527
1225C
p-binary
bitmasks
,
brute force
,
math
1600
x8632
500B
New Year Permutation
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
,
sortings
1600
x8678
1658D1
388535 (Easy Version)
bitmasks
,
math
1600
x8725
1921E
Eat the Chip
brute force
,
games
,
greedy
,
math
1600
x8756
1612D
X-Magic Pair
math
,
number theory
1600
x8798
1530D
Secret Santa
constructive algorithms
,
flows
,
graphs
,
greedy
,
math
1600
x8868
678C
Joty and Chocolate
implementation
,
math
,
number theory
1600
x8920
1771C
Hossam and Trainees
greedy
,
math
,
number theory
1600
x8925
1798D
Shocking Arrangement
constructive algorithms
,
greedy
,
math
1600
x8936
1917C
Watering an Array
brute force
,
greedy
,
implementation
,
math
1600
x9242
1829G
Hits Different
data structures
,
dp
,
implementation
,
math
1600
x9265
1775C
Interesting Sequence
bitmasks
,
math
1600
x9544
1822E
Making Anti-Palindromes
greedy
,
math
,
strings
1600
x9602
1796C
Maximum Set
binary search
,
math
1600
x9686
1703G
Good Key, Bad Key
bitmasks
,
brute force
,
dp
,
greedy
,
math
1600
x9913
1512E
Permutation by Sum
brute force
,
greedy
,
math
1600
x9964
1582D
Vupsen, Pupsen and 0
constructive algorithms
,
math
1600
x10078
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