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Before contest
Codeforces Round 941 (Div. 1)
30:20:13
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*has extra registration
Before contest
Codeforces Round 941 (Div. 2)
30:20:13
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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
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number theory
probabilities
schedules
shortest paths
sortings
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ternary search
trees
two pointers
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Custom test
Problems
#
Name
1554B
Cobb
bitmasks
,
brute force
,
greedy
,
math
1700
x12386
276D
Little Girl and Maximum XOR
bitmasks
,
dp
,
greedy
,
implementation
,
math
1700
x12909
1538D
Another Problem About Dividing Numbers
constructive algorithms
,
math
,
number theory
1700
x13011
1359C
Mixing Water
binary search
,
math
1700
x13241
100E
Lamps in a Line
*special problem
,
math
1600
x265
64C
Table
*special problem
,
greedy
,
implementation
,
math
1600
x331
40B
Repaintings
math
1600
x1110
139B
Wallpaper
implementation
,
math
1600
x1271
73A
The Elder Trolls IV: Oblivon
greedy
,
math
1600
x1296
86A
Reflection
math
1600
x1339
958E1
Guard Duty (easy)
brute force
,
geometry
,
greedy
,
math
1600
x1467
167A
Wizards and Trolleybuses
implementation
,
math
1600
x2010
209A
Multicolored Marbles
dp
,
math
1600
x2230
135B
Rectangle and Square
brute force
,
geometry
,
math
1600
x2294
373B
Making Sequences is Fun
binary search
,
implementation
,
math
1600
x2428
142A
Help Farmer
brute force
,
math
1600
x2561
272D
Dima and Two Sequences
combinatorics
,
math
,
sortings
1600
x2581
630G
Challenge Pennants
combinatorics
,
math
1600
x2617
319A
Malek Dance Club
combinatorics
,
math
1600
x2752
595B
Pasha and Phone
binary search
,
math
1600
x2894
23B
Party
constructive algorithms
,
graphs
,
math
1600
x3194
107B
Basketball Team
combinatorics
,
dp
,
math
,
probabilities
1600
x3277
444A
DZY Loves Physics
greedy
,
math
1600
x3365
269A
Magical Boxes
greedy
,
math
1600
x3471
746C
Tram
constructive algorithms
,
implementation
,
math
1600
x3681
150B
Quantity of Strings
combinatorics
,
dfs and similar
,
graphs
,
math
1600
x3946
1056B
Divide Candies
math
,
number theory
1600
x4065
340C
Tourist Problem
combinatorics
,
implementation
,
math
1600
x4099
154B
Colliders
math
,
number theory
1600
x4223
11B
Jumping Jack
math
1600
x4280
626C
Block Towers
brute force
,
greedy
,
math
,
number theory
1600
x4285
597A
Divisibility
math
1600
x4408
992C
Nastya and a Wardrobe
math
1600
x4508
405C
Unusual Product
implementation
,
math
1600
x4563
375A
Divisible by Seven
math
,
number theory
1600
x4647
1423K
Lonely Numbers
binary search
,
math
,
number theory
,
two pointers
1600
x4649
353C
Find Maximum
implementation
,
math
,
number theory
1600
x4711
407A
Triangle
brute force
,
geometry
,
implementation
,
math
1600
x4740
337C
Quiz
binary search
,
greedy
,
math
,
matrices
,
number theory
1600
x4765
214B
Hometask
brute force
,
constructive algorithms
,
greedy
,
math
1600
x4878
534C
Polycarpus' Dice
math
1600
x4923
568A
Primes or Palindromes?
brute force
,
implementation
,
math
,
number theory
1600
x4998
424C
Magic Formulas
math
1600
x5178
1062C
Banh-mi
greedy
,
implementation
,
math
1600
x5305
1085C
Connect Three
implementation
,
math
1600
x5362
741A
Arpa's loud Owf and Mehrdad's evil plan
dfs and similar
,
math
1600
x5393
476C
Dreamoon and Sums
math
1600
x5403
712C
Memory and De-Evolution
greedy
,
math
1600
x5528
715A
Plus and Square Root
constructive algorithms
,
math
1600
x5541
1036B
Diagonal Walking v.2
math
1600
x5609
573B
Bear and Blocks
binary search
,
data structures
,
dp
,
math
1600
x5623
525C
Ilya and Sticks
greedy
,
math
,
sortings
1600
x5693
500C
New Year Book Reading
constructive algorithms
,
greedy
,
implementation
,
math
1600
x5738
538C
Tourist's Notes
binary search
,
brute force
,
greedy
,
implementation
,
math
1600
x5756
197A
Plate Game
constructive algorithms
,
games
,
math
1600
x6027
992B
Nastya Studies Informatics
math
,
number theory
1600
x6083
71C
Round Table Knights
dp
,
math
,
number theory
1600
x6213
495B
Modular Equations
math
,
number theory
1600
x6445
750C
New Year and Rating
binary search
,
greedy
,
math
1600
x6484
1932E
Final Countdown
implementation
,
math
,
number theory
1600
x6602
1787C
Remove the Bracket
dp
,
greedy
,
math
1600
x6676
1059C
Sequence Transformation
constructive algorithms
,
math
1600
x6970
1811D
Umka and a Long Flight
constructive algorithms
,
implementation
,
math
1600
x7004
817C
Really Big Numbers
binary search
,
brute force
,
dp
,
math
1600
x7007
1238C
Standard Free2play
dp
,
greedy
,
math
1600
x7095
1029C
Maximal Intersection
greedy
,
math
,
sortings
1600
x7134
1806C
Sequence Master
brute force
,
constructive algorithms
,
math
1600
x7168
785C
Anton and Fairy Tale
binary search
,
math
1600
x7171
735C
Tennis Championship
combinatorics
,
constructive algorithms
,
greedy
,
math
1600
x7333
1928C
Physical Education Lesson
brute force
,
math
,
number theory
1600
x7362
603A
Alternative Thinking
dp
,
greedy
,
math
1600
x7532
888D
Almost Identity Permutations
combinatorics
,
dp
,
math
1600
x7588
1284C
New Year and Permutation
combinatorics
,
math
1600
x7702
1452D
Radio Towers
combinatorics
,
dp
,
math
1600
x7745
1165E
Two Arrays and Sum of Functions
greedy
,
math
,
sortings
1600
x7770
1615C
Menorah
brute force
,
graphs
,
greedy
,
math
1600
x8029
1660D
Maximum Product Strikes Back
brute force
,
implementation
,
math
,
two pointers
1600
x8094
1151D
Stas and the Queue at the Buffet
greedy
,
math
,
sortings
1600
x8201
1766D
Lucky Chains
math
,
number theory
1600
x8315
1795D
Triangle Coloring
combinatorics
,
math
1600
x8418
346A
Alice and Bob
games
,
math
,
number theory
1600
x8441
343A
Rational Resistance
math
,
number theory
1600
x8500
1225C
p-binary
bitmasks
,
brute force
,
math
1600
x8638
500B
New Year Permutation
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
,
sortings
1600
x8682
1658D1
388535 (Easy Version)
bitmasks
,
math
1600
x8737
1612D
X-Magic Pair
math
,
number theory
1600
x8809
1921E
Eat the Chip
brute force
,
games
,
greedy
,
math
1600
x8817
1530D
Secret Santa
constructive algorithms
,
flows
,
graphs
,
greedy
,
math
1600
x8879
678C
Joty and Chocolate
implementation
,
math
,
number theory
1600
x8921
1771C
Hossam and Trainees
greedy
,
math
,
number theory
1600
x8958
1798D
Shocking Arrangement
constructive algorithms
,
greedy
,
math
1600
x8986
1917C
Watering an Array
brute force
,
greedy
,
implementation
,
math
1600
x9306
1829G
Hits Different
data structures
,
dp
,
implementation
,
math
1600
x9321
1775C
Interesting Sequence
bitmasks
,
math
1600
x9585
1822E
Making Anti-Palindromes
greedy
,
math
,
strings
1600
x9644
1956C
Nene's Magical Matrix
constructive algorithms
,
greedy
,
math
1600
x9683
1796C
Maximum Set
binary search
,
math
1600
x9721
1703G
Good Key, Bad Key
bitmasks
,
brute force
,
dp
,
greedy
,
math
1600
x9949
1512E
Permutation by Sum
brute force
,
greedy
,
math
1600
x9988
1582D
Vupsen, Pupsen and 0
constructive algorithms
,
math
1600
x10093
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