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Codeforces Round 945 (Div. 2)
43:54:40
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number theory
combine-tags-by-or
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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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probabilities
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shortest paths
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ternary search
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Problems
#
Name
757B
Bash's Big Day
greedy
,
math
,
number theory
1400
x9864
1366D
Two Divisors
constructive algorithms
,
math
,
number theory
2000
x9929
758B
Blown Garland
brute force
,
implementation
,
number theory
1100
x10062
1143B
Nirvana
brute force
,
math
,
number theory
1200
x10072
1877C
Joyboard
math
,
number theory
1200
x10086
1926E
Vlad and an Odd Ordering
binary search
,
bitmasks
,
data structures
,
dp
,
implementation
,
math
,
number theory
1500
x10089
1744E1
Divisible Numbers (easy version)
brute force
,
math
,
number theory
1500
x10254
1858B
The Walkway
brute force
,
dp
,
greedy
,
math
,
number theory
1500
x10658
946B
Weird Subtraction Process
math
,
number theory
1100
x10672
630J
Divisibility
math
,
number theory
1100
x10693
1875C
Jellyfish and Green Apple
bitmasks
,
greedy
,
math
,
number theory
1400
x10801
371B
Fox Dividing Cheese
math
,
number theory
1300
x10920
1133D
Zero Quantity Maximization
hashing
,
math
,
number theory
1500
x10959
787A
The Monster
brute force
,
math
,
number theory
1200
x11052
1068B
LCM
math
,
number theory
1200
x11102
546D
Soldier and Number Game
constructive algorithms
,
dp
,
math
,
number theory
1700
x11255
1166B
All the Vowels Please
constructive algorithms
,
math
,
number theory
1100
x11259
1220B
Multiplication Table
math
,
number theory
1300
x11342
912B
New Year's Eve
bitmasks
,
constructive algorithms
,
number theory
1300
x11390
1804C
Pull Your Luck
brute force
,
greedy
,
math
,
number theory
1500
x11547
1811E
Living Sequence
binary search
,
dp
,
math
,
number theory
1500
x11590
1325D
Ehab the Xorcist
bitmasks
,
constructive algorithms
,
greedy
,
number theory
1700
x11593
1844D
Row Major
constructive algorithms
,
greedy
,
math
,
number theory
,
strings
1400
x11640
1823C
Strongly Composite
greedy
,
math
,
number theory
1300
x11686
1673C
Palindrome Basis
brute force
,
dp
,
math
,
number theory
1500
x11757
1174C
Ehab and a Special Coloring Problem
constructive algorithms
,
number theory
1300
x11808
743C
Vladik and fractions
brute force
,
constructive algorithms
,
math
,
number theory
1500
x11852
1920C
Partitioning the Array
brute force
,
math
,
number theory
1600
x11856
1537D
Deleting Divisors
games
,
math
,
number theory
1700
x11882
75C
Modified GCD
binary search
,
number theory
1600
x12017
1950E
Nearly Shortest Repeating Substring
brute force
,
implementation
,
number theory
,
strings
1500
x12058
1753B
Factorial Divisibility
math
,
number theory
1600
x12069
460B
Little Dima and Equation
brute force
,
implementation
,
math
,
number theory
1500
x12097
1899D
Yarik and Musical Notes
hashing
,
math
,
number theory
1300
x12247
1242A
Tile Painting
constructive algorithms
,
math
,
number theory
1500
x12277
1759D
Make It Round
brute force
,
number theory
1400
x12286
1902C
Insert and Equalize
brute force
,
constructive algorithms
,
greedy
,
math
,
number theory
1300
x12296
707C
Pythagorean Triples
math
,
number theory
1500
x12308
633A
Ebony and Ivory
brute force
,
math
,
number theory
1100
x12326
1133B
Preparation for International Women's Day
math
,
number theory
1200
x12375
271B
Prime Matrix
binary search
,
brute force
,
math
,
number theory
1300
x12414
1379B
Dubious Cyrpto
binary search
,
brute force
,
math
,
number theory
1500
x12473
1076B
Divisor Subtraction
implementation
,
math
,
number theory
1200
x12565
1444A
Division
brute force
,
math
,
number theory
1500
x12574
1864C
Divisor Chain
bitmasks
,
constructive algorithms
,
math
,
number theory
1300
x12616
1787B
Number Factorization
greedy
,
math
,
number theory
1100
x12715
1765M
Minimum LCM
math
,
number theory
1000
x12733
735D
Taxes
math
,
number theory
1600
x12734
1826C
Dreaming of Freedom
greedy
,
math
,
number theory
1300
x12814
1758C
Almost All Multiples
greedy
,
number theory
1400
x12932
1603B
Moderate Modular Mode
constructive algorithms
,
math
,
number theory
1600
x13079
1538D
Another Problem About Dividing Numbers
constructive algorithms
,
math
,
number theory
1700
x13080
1581A
CQXYM Count Permutations
combinatorics
,
math
,
number theory
800
x13261
1601A
Array Elimination
bitmasks
,
greedy
,
math
,
number theory
1300
x13282
576A
Vasya and Petya's Game
math
,
number theory
1500
x13319
1263C
Everyone is a Winner!
binary search
,
math
,
meet-in-the-middle
,
number theory
1400
x13356
1838C
No Prime Differences
constructive algorithms
,
math
,
number theory
1400
x13468
236B
Easy Number Challenge
implementation
,
number theory
1300
x13497
1583A
Windblume Ode
math
,
number theory
800
x13533
1542C
Strange Function
math
,
number theory
1600
x13542
1536C
Diluc and Kaeya
data structures
,
dp
,
hashing
,
number theory
1500
x13578
1342C
Yet Another Counting Problem
math
,
number theory
1600
x13609
1305C
Kuroni and Impossible Calculation
brute force
,
combinatorics
,
math
,
number theory
1600
x13627
1606C
Banknotes
greedy
,
number theory
1400
x13762
1245A
Good ol' Numbers Coloring
math
,
number theory
1000
x13898
1909B
Make Almost Equal With Mod
bitmasks
,
constructive algorithms
,
math
,
number theory
1200
x13956
797A
k-Factorization
implementation
,
math
,
number theory
1100
x14053
1627C
Not Assigning
constructive algorithms
,
dfs and similar
,
number theory
,
trees
1400
x14061
1514C
Product 1 Modulo N
greedy
,
number theory
1600
x14334
1397B
Power Sequence
brute force
,
math
,
number theory
,
sortings
1500
x14362
1732A
Bestie
brute force
,
combinatorics
,
constructive algorithms
,
implementation
,
math
,
number theory
1000
x14437
1881D
Divide and Equalize
math
,
number theory
1300
x14531
84A
Toy Army
math
,
number theory
900
x14589
1277B
Make Them Odd
greedy
,
number theory
1200
x14644
1149A
Prefix Sum Primes
constructive algorithms
,
greedy
,
math
,
number theory
1200
x14744
1107B
Digital root
math
,
number theory
1000
x14838
1396A
Multiples of Length
constructive algorithms
,
greedy
,
number theory
1600
x14972
17A
Noldbach problem
brute force
,
math
,
number theory
1000
x15117
1165D
Almost All Divisors
math
,
number theory
1600
x15196
1344A
Hilbert's Hotel
math
,
number theory
,
sortings
1600
x15201
1764B
Doremy's Perfect Math Class
math
,
number theory
900
x15276
1714E
Add Modulo 10
brute force
,
math
,
number theory
1400
x15316
1954C
Long Multiplication
greedy
,
math
,
number theory
1200
x15803
1826B
Lunatic Never Content
math
,
number theory
1100
x15813
1312C
Adding Powers
bitmasks
,
greedy
,
implementation
,
math
,
number theory
,
ternary search
1400
x15892
1931D
Divisible Pairs
combinatorics
,
math
,
number theory
1300
x15900
1349A
Orac and LCM
data structures
,
math
,
number theory
1600
x15944
1519C
Berland Regional
brute force
,
data structures
,
greedy
,
number theory
,
sortings
1400
x16005
1458A
Row GCD
math
,
number theory
1600
x16021
456B
Fedya and Maths
math
,
number theory
1200
x16039
1603A
Di-visible Confusion
constructive algorithms
,
math
,
number theory
1300
x16160
1762B
Make Array Good
constructive algorithms
,
implementation
,
number theory
,
sortings
1100
x16203
1462D
Add to Neighbour and Remove
greedy
,
math
,
number theory
1400
x16244
573A
Bear and Poker
implementation
,
math
,
number theory
1300
x16302
1051B
Relatively Prime Pairs
greedy
,
math
,
number theory
1000
x16576
1780B
GCD Partition
brute force
,
greedy
,
math
,
number theory
1100
x16605
1609A
Divide and Multiply
greedy
,
implementation
,
math
,
number theory
900
x16686
1407B
Big Vova
brute force
,
greedy
,
math
,
number theory
1300
x16690
235A
LCM Challenge
number theory
1600
x16843
1816A
Ian Visits Mary
constructive algorithms
,
geometry
,
number theory
800
x16940
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