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Codeforces Round 940 (Div. 2)
4 days
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*has extra registration
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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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Status
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Custom test
Problems
#
Name
559A
Gerald's Hexagon
brute force
,
geometry
,
math
1600
x10270
1857F
Sum and Product
binary search
,
data structures
,
math
1600
x10288
1217B
Zmei Gorynich
greedy
,
math
1600
x10889
1213D2
Equalizing by Division (hard version)
brute force
,
math
,
sortings
1600
x11000
1294D
MEX maximizing
data structures
,
greedy
,
implementation
,
math
1600
x11264
1407C
Chocolate Bunny
constructive algorithms
,
interactive
,
math
,
two pointers
1600
x11357
322B
Ciel and Flowers
combinatorics
,
math
1600
x11448
1920C
Partitioning the Array
brute force
,
math
,
number theory
1600
x11583
1730B
Meeting on the Line
binary search
,
geometry
,
greedy
,
implementation
,
math
,
ternary search
1600
x11725
1567C
Carrying Conundrum
bitmasks
,
combinatorics
,
dp
,
math
1600
x11793
165C
Another Problem on Strings
binary search
,
brute force
,
dp
,
math
,
strings
,
two pointers
1600
x11836
1753B
Factorial Divisibility
math
,
number theory
1600
x11948
1632C
Strange Test
binary search
,
bitmasks
,
brute force
,
dp
,
math
1600
x12190
348A
Mafia
binary search
,
math
,
sortings
1600
x12560
735D
Taxes
math
,
number theory
1600
x12594
1475E
Advertising Agency
combinatorics
,
math
,
sortings
1600
x12803
1603B
Moderate Modular Mode
constructive algorithms
,
math
,
number theory
1600
x13026
1527C
Sequence Pair Weight
hashing
,
implementation
,
math
1600
x13055
1542C
Strange Function
math
,
number theory
1600
x13451
1305C
Kuroni and Impossible Calculation
brute force
,
combinatorics
,
math
,
number theory
1600
x13464
1342C
Yet Another Counting Problem
math
,
number theory
1600
x13568
1519D
Maximum Sum of Products
brute force
,
dp
,
implementation
,
math
,
two pointers
1600
x14497
1165D
Almost All Divisors
math
,
number theory
1600
x14943
1344A
Hilbert's Hotel
math
,
number theory
,
sortings
1600
x15163
1349A
Orac and LCM
data structures
,
math
,
number theory
1600
x15820
1458A
Row GCD
math
,
number theory
1600
x15855
1334C
Circle of Monsters
brute force
,
constructive algorithms
,
greedy
,
math
1600
x16006
1497C2
k-LCM (hard version)
constructive algorithms
,
math
1600
x16354
1358C
Celex Update
math
1600
x16966
1B
Spreadsheet
implementation
,
math
1600
x21596
1398C
Good Subarrays
data structures
,
dp
,
math
1600
x23971
100I
Rotation
*special problem
,
geometry
,
math
1500
x337
49B
Sum
math
1500
x2375
362A
Two Semiknights Meet
greedy
,
math
1500
x2627
1089G
Guest Student
math
1500
x2847
417A
Elimination
dp
,
implementation
,
math
1500
x2861
400C
Inna and Huge Candy Matrix
implementation
,
math
1500
x2862
404B
Marathon
implementation
,
math
1500
x2892
566F
Clique in the Divisibility Graph
dp
,
math
,
number theory
1500
x3509
724B
Batch Sort
brute force
,
greedy
,
implementation
,
math
1500
x3953
1250H
Happy Birthday
math
1500
x3958
1250L
Divide The Students
binary search
,
greedy
,
math
1500
x4014
520C
DNA Alignment
math
,
strings
1500
x4076
884C
Bertown Subway
dfs and similar
,
greedy
,
math
1500
x4603
809A
Do you want a date?
implementation
,
math
,
sortings
1500
x4645
569A
Music
implementation
,
math
1500
x4738
746D
Green and Black Tea
constructive algorithms
,
greedy
,
math
1500
x4965
710C
Magic Odd Square
constructive algorithms
,
math
1500
x4973
630K
Indivisibility
math
,
number theory
1500
x5008
1776L
Controllers
binary search
,
math
1500
x5085
87A
Trains
implementation
,
math
1500
x5145
148B
Escape
implementation
,
math
1500
x5239
149C
Division into Teams
greedy
,
math
,
sortings
1500
x5246
1765K
Torus Path
greedy
,
math
1500
x5335
354A
Vasya and Robot
brute force
,
greedy
,
math
1500
x5381
676B
Pyramid of Glasses
implementation
,
math
,
math
1500
x5454
817B
Makes And The Product
combinatorics
,
implementation
,
math
,
sortings
1500
x5529
1737C
Ela and Crickets
constructive algorithms
,
games
,
implementation
,
math
1500
x5535
1725G
Garage
binary search
,
geometry
,
math
1500
x5563
864C
Bus
greedy
,
implementation
,
math
1500
x5822
864D
Make a Permutation!
greedy
,
implementation
,
math
1500
x5951
415B
Mashmokh and Tokens
binary search
,
greedy
,
implementation
,
math
1500
x6098
659D
Bicycle Race
geometry
,
implementation
,
math
1500
x6129
1012A
Photo of The Sky
brute force
,
implementation
,
math
,
sortings
1500
x6145
609C
Load Balancing
implementation
,
math
1500
x6277
166C
Median
greedy
,
math
,
sortings
1500
x6325
1119C
Ramesses and Corner Inversion
constructive algorithms
,
greedy
,
implementation
,
math
1500
x6553
908C
New Year and Curling
brute force
,
geometry
,
implementation
,
math
1500
x6655
1158A
The Party and Sweets
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
,
sortings
,
two pointers
1500
x6712
1081C
Colorful Bricks
combinatorics
,
dp
,
math
1500
x6942
557B
Pasha and Tea
constructive algorithms
,
implementation
,
math
,
sortings
1500
x7073
1178D
Prime Graph
constructive algorithms
,
greedy
,
math
,
number theory
1500
x7131
1195D1
Submarine in the Rybinsk Sea (easy edition)
combinatorics
,
math
,
number theory
1500
x7655
468A
24 Game
constructive algorithms
,
greedy
,
math
1500
x7741
1010A
Fly
binary search
,
math
1500
x7986
1789C
Serval and Toxel's Arrays
combinatorics
,
dp
,
implementation
,
math
1500
x7997
997A
Convert to Ones
brute force
,
greedy
,
implementation
,
math
1500
x8143
978D
Almost Arithmetic Progression
brute force
,
implementation
,
math
1500
x8317
553A
Kyoya and Colored Balls
combinatorics
,
dp
,
math
1500
x8359
1062B
Math
greedy
,
math
,
number theory
1500
x8379
1408C
Discrete Acceleration
binary search
,
dp
,
implementation
,
math
,
two pointers
1500
x8605
1186D
Vus the Cossack and Numbers
constructive algorithms
,
greedy
,
math
1500
x8694
1110C
Meaningless Operations
constructive algorithms
,
math
,
number theory
1500
x8902
742B
Arpa’s obvious problem and Mehrdad’s terrible solution
brute force
,
math
,
number theory
1500
x9014
1482B
Restore Modulo
implementation
,
math
1500
x9030
282C
XOR and OR
constructive algorithms
,
implementation
,
math
1500
x9078
1051C
Vasya and Multisets
brute force
,
dp
,
greedy
,
implementation
,
math
1500
x9115
1767D
Playoff
combinatorics
,
constructive algorithms
,
dp
,
greedy
,
math
1500
x9352
1933E
Turtle vs. Rabbit Race: Optimal Trainings
binary search
,
implementation
,
math
,
ternary search
1500
x9390
891A
Pride
brute force
,
dp
,
greedy
,
math
,
number theory
1500
x9552
1659C
Line Empire
binary search
,
brute force
,
dp
,
greedy
,
implementation
,
math
1500
x9564
1926E
Vlad and an Odd Ordering
binary search
,
bitmasks
,
data structures
,
dp
,
implementation
,
math
,
number theory
1500
x9628
1742G
Orray
bitmasks
,
brute force
,
greedy
,
math
,
sortings
1500
x9688
1614C
Divan and bitwise operations
bitmasks
,
combinatorics
,
constructive algorithms
,
dp
,
math
1500
x9884
1105C
Ayoub and Lost Array
combinatorics
,
dp
,
math
1500
x10099
1744E1
Divisible Numbers (easy version)
brute force
,
math
,
number theory
1500
x10123
1898B
Milena and Admirer
greedy
,
math
1500
x10292
1738C
Even Number Addicts
dp
,
games
,
greedy
,
math
1500
x10438
1858B
The Walkway
brute force
,
dp
,
greedy
,
math
,
number theory
1500
x10521
1710A
Color the Picture
constructive algorithms
,
greedy
,
math
1500
x10559
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