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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
30:09:14
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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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Problems
#
Name
1761F1
Anti-median (Easy Version)
dp
,
math
3100
x210
1761D
Carry Bit
combinatorics
,
math
2100
x2486
1760E
Binary Inversions
data structures
,
greedy
,
math
1100
x20526
1759G
Restore the Permutation
binary search
,
constructive algorithms
,
data structures
,
greedy
,
math
1900
x4532
1759F
All Possible Digits
binary search
,
data structures
,
greedy
,
math
,
number theory
1800
x3970
1759C
Thermostat
greedy
,
math
,
shortest paths
1100
x17862
1759B
Lost Permutation
math
800
x22344
1758D
Range = √Sum
binary search
,
brute force
,
constructive algorithms
,
math
,
two pointers
1800
x7397
1754B
Kevin and Permutation
constructive algorithms
,
greedy
,
math
800
x18981
1753C
Wish I Knew How to Sort
dp
,
math
,
probabilities
2000
x4574
1753B
Factorial Divisibility
math
,
number theory
1600
x12982
1750G
Doping
combinatorics
,
dp
,
math
3300
x249
1750F
Majority
combinatorics
,
dp
,
math
,
strings
2700
x924
1750D
Count GCD
combinatorics
,
math
,
number theory
1800
x5999
1750A
Indirect Sort
constructive algorithms
,
implementation
,
math
800
x17108
1749D
Counting Arrays
combinatorics
,
dp
,
math
,
number theory
1900
x5623
1748E
Yet Another Array Counting Problem
binary search
,
data structures
,
divide and conquer
,
dp
,
flows
,
math
,
trees
2300
x1967
1748D
ConstructOR
bitmasks
,
chinese remainder theorem
,
combinatorics
,
constructive algorithms
,
math
,
number theory
2100
x2844
1748A
The Ultimate Square
math
800
x24171
1747E
List Generation
combinatorics
,
dp
,
math
2900
x527
1746C
Permutation Operations
constructive algorithms
,
greedy
,
implementation
,
math
1300
x12893
1744F
MEX vs MED
math
,
two pointers
2000
x3144
1744E2
Divisible Numbers (hard version)
brute force
,
math
,
number theory
1900
x5670
1744E1
Divisible Numbers (easy version)
brute force
,
math
,
number theory
1500
x11009
1744D
Divisibility by 2^n
greedy
,
math
,
sortings
1200
x21684
1744B
Even-Odd Increments
implementation
,
math
800
x23608
1743G
Antifibonacci Cut
bitmasks
,
combinatorics
,
constructive algorithms
,
data structures
,
dp
,
hashing
,
math
3000
x260
1743A
Password
brute force
,
combinatorics
,
implementation
,
math
800
x26912
1742G
Orray
bitmasks
,
brute force
,
greedy
,
math
,
sortings
1500
x10919
1742E
Scuza
binary search
,
greedy
,
math
1200
x25363
1741F
Multi-Colored Segments
binary search
,
data structures
,
math
,
sortings
2000
x2472
1741C
Minimize the Thickness
brute force
,
greedy
,
math
,
two pointers
1100
x17870
1741B
Funny Permutation
constructive algorithms
,
math
800
x25545
1740F
Conditional Mix
combinatorics
,
dp
,
math
2600
x825
1739B
Array Recovery
constructive algorithms
,
greedy
,
math
1100
x22567
1738G
Anti-Increasing Addicts
constructive algorithms
,
dp
,
greedy
,
math
2900
x462
1738E
Balance Addicts
combinatorics
,
dp
,
math
,
two pointers
2300
x1569
1738C
Even Number Addicts
dp
,
games
,
greedy
,
math
1500
x11291
1738B
Prefix Sum Addicts
constructive algorithms
,
greedy
,
math
,
sortings
1200
x15836
1737F
Ela and Prime GCD
constructive algorithms
,
math
,
number theory
3300
x125
1737E
Ela Goes Hiking
combinatorics
,
dp
,
math
,
probabilities
2500
x946
1737C
Ela and Crickets
constructive algorithms
,
games
,
implementation
,
math
1500
x5800
1737B
Ela's Fitness and the Luxury Number
binary search
,
implementation
,
math
1300
x9454
1736B
Playing with GCD
math
,
number theory
1200
x18192
1735D
Meta-set
brute force
,
combinatorics
,
data structures
,
hashing
,
math
1700
x5553
1735B
Tea with Tangerines
greedy
,
math
900
x18302
1735A
Working Week
constructive algorithms
,
greedy
,
math
800
x20349
1734F
Zeros and Ones
bitmasks
,
divide and conquer
,
dp
,
math
2500
x820
1734C
Removing Smallest Multiples
greedy
,
math
1200
x19068
1733E
Conveyor
constructive algorithms
,
dp
,
math
2700
x1255
1733D1
Zero-One (Easy Version)
constructive algorithms
,
greedy
,
math
1400
x13609
1733B
Rule of League
constructive algorithms
,
math
900
x19850
1732E
Location
data structures
,
dp
,
math
,
number theory
2800
x463
1732A
Bestie
brute force
,
combinatorics
,
constructive algorithms
,
implementation
,
math
,
number theory
1000
x15158
1731F
Function Sum
brute force
,
combinatorics
,
dp
,
fft
,
math
2500
x706
1731E
Graph Cost
dp
,
greedy
,
math
,
number theory
2000
x2875
1731C
Even Subarrays
bitmasks
,
brute force
,
hashing
,
math
,
number theory
1700
x9712
1731B
Kill Demodogs
greedy
,
math
1100
x18615
1731A
Joey Takes Money
greedy
,
math
800
x22690
1730C
Minimum Notation
data structures
,
greedy
,
math
,
sortings
1200
x16614
1730B
Meeting on the Line
binary search
,
geometry
,
greedy
,
implementation
,
math
,
ternary search
1600
x12971
1729F
Kirei and the Linear Function
hashing
,
math
1900
x4189
1729A
Two Elevators
math
800
x40932
1728G
Illumination
binary search
,
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
,
two pointers
2700
x468
1728E
Red-Black Pepper
brute force
,
data structures
,
greedy
,
math
,
number theory
2300
x1756
1726H
Mainak and the Bleeding Polygon
binary search
,
geometry
,
implementation
,
math
3500
x87
1726E
Almost Perfect
combinatorics
,
fft
,
math
2400
x1436
1726B
Mainak and Interesting Sequence
bitmasks
,
constructive algorithms
,
math
1100
x15231
1726A
Mainak and Array
greedy
,
math
900
x22402
1725H
Hot Black Hot White
constructive algorithms
,
math
1800
x2654
1725G
Garage
binary search
,
geometry
,
math
1500
x5938
1725E
Electrical Efficiency
combinatorics
,
data structures
,
dp
,
math
,
number theory
,
trees
2500
x489
1725D
Deducing Sortability
binary search
,
bitmasks
,
math
2900
x130
1725C
Circular Mirror
binary search
,
combinatorics
,
geometry
,
math
,
two pointers
2000
x1652
1725A
Accumulation of Dominoes
math
800
x9312
1720E
Misha and Paintings
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
2700
x815
1720B
Interesting Sum
brute force
,
data structures
,
greedy
,
math
,
sortings
800
x21287
1720A
Burenka Plays with Fractions
math
,
number theory
900
x22520
1719B
Mathematical Circus
constructive algorithms
,
math
800
x18592
1719A
Chip Game
games
,
math
800
x25671
1718F
Burenka, an Array and Queries
data structures
,
math
,
number theory
3300
x163
1718E
Impressionism
constructive algorithms
,
graphs
,
implementation
,
math
3500
x120
1718D
Permutation for Burenka
data structures
,
graph matchings
,
greedy
,
math
,
trees
3300
x314
1718C
Tonya and Burenka-179
data structures
,
greedy
,
math
,
number theory
2400
x1638
1718B
Fibonacci Strings
greedy
,
implementation
,
math
,
number theory
2000
x3046
1717E
Madoka and The Best University
math
,
number theory
2200
x2763
1717D
Madoka and The Corruption Scheme
combinatorics
,
constructive algorithms
,
greedy
,
math
1900
x4435
1717A
Madoka and Strange Thoughts
math
,
number theory
800
x19577
1716F
Bags with Balls
combinatorics
,
dp
,
math
,
number theory
2500
x1080
1716D
Chip Move
brute force
,
dp
,
math
2000
x5323
1716B
Permutation Chain
constructive algorithms
,
math
800
x21462
1716A
2-3 Moves
greedy
,
math
800
x33174
1715F
Crop Squares
constructive algorithms
,
geometry
,
interactive
,
math
2700
x530
1715C
Monoblock
combinatorics
,
data structures
,
implementation
,
math
1700
x8708
1715B
Beautiful Array
constructive algorithms
,
greedy
,
math
1000
x22320
1715A
Crossmarket
constructive algorithms
,
greedy
,
math
800
x23602
1714E
Add Modulo 10
brute force
,
math
,
number theory
1400
x16900
1714A
Everyone Loves to Sleep
implementation
,
math
900
x29935
1713F
Lost Array
bitmasks
,
combinatorics
,
constructive algorithms
,
dp
,
math
2900
x546
1713C
Build Permutation
constructive algorithms
,
dp
,
math
1200
x17490
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