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CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!)
32:37:04
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Difficulty:
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number theory
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
1310F
Bad Cryptography
math
,
number theory
3400
x66
765G
Math, math everywhere
brute force
,
dp
,
math
,
meet-in-the-middle
,
number theory
3200
x73
1896H1
Cyclic Hamming (Easy Version)
brute force
,
divide and conquer
,
dp
,
fft
,
math
,
number theory
3400
x74
1375I
Cubic Lattice
geometry
,
math
,
matrices
,
number theory
3500
x75
1896H2
Cyclic Hamming (Hard Version)
brute force
,
dp
,
fft
,
math
,
number theory
3500
x79
1190F
Tokitsukaze and Powers
number theory
,
probabilities
3400
x86
756F
Long number
expression parsing
,
math
,
number theory
3400
x88
1740I
Arranging Crystal Balls
data structures
,
divide and conquer
,
divide and conquer
,
dp
,
geometry
,
graphs
,
number theory
3500
x98
1566H
Xor-quiz
constructive algorithms
,
dp
,
interactive
,
math
,
number theory
3200
x104
774F
Pens And Days Of Week
*special problem
,
binary search
,
number theory
2700
x104
1737F
Ela and Prime GCD
constructive algorithms
,
math
,
number theory
3300
x114
1488G
Painting Numbers
*special problem
,
data structures
,
greedy
,
number theory
2500
x114
1916G
Optimizations From Chelsu
divide and conquer
,
dp
,
number theory
,
trees
3500
x126
1346G
Two IP Cameras
*special problem
,
math
,
number theory
2300
x129
1184A3
Heidi Learns Hashing (Hard)
fft
,
math
,
number theory
3100
x130
804F
Fake bullions
combinatorics
,
dfs and similar
,
dp
,
graphs
,
number theory
3400
x135
1707F
Bugaboo
bitmasks
,
constructive algorithms
,
dp
,
number theory
3500
x137
1906G
Grid Game 2
games
,
number theory
2900
x139
1718F
Burenka, an Array and Queries
data structures
,
math
,
number theory
3300
x141
1934E
Weird LCM Operations
brute force
,
constructive algorithms
,
number theory
3000
x145
1575C
Cyclic Sum
data structures
,
fft
,
number theory
3000
x152
500G
New Year Running
number theory
,
trees
3200
x154
1054H
Epic Convolution
chinese remainder theorem
,
fft
,
math
,
number theory
3500
x161
1796F
Strange Triples
brute force
,
math
,
number theory
2900
x165
1479E
School Clubs
dp
,
fft
,
math
,
number theory
,
probabilities
3500
x172
774G
Perfectionist Arkadiy
*special problem
,
number theory
2700
x172
773F
Test Data Generation
combinatorics
,
divide and conquer
,
dp
,
fft
,
math
,
number theory
3400
x177
1091G
New Year and the Factorisation Collaboration
interactive
,
math
,
number theory
3200
x188
913G
Power Substring
math
,
number theory
3200
x191
819C
Mister B and Beacons on Field
number theory
2900
x201
774E
Big Number and Remainder
*special problem
,
math
,
number theory
2300
x206
1687E
Become Big For Me
combinatorics
,
constructive algorithms
,
greedy
,
math
,
number theory
3500
x208
1098E
Fedya the Potter
binary search
,
implementation
,
math
,
number theory
3400
x208
819D
Mister B and Astronomers
number theory
2900
x211
1103E
Radix sum
fft
,
math
,
number theory
3400
x212
1223G
Wooden Raft
binary search
,
math
,
number theory
3200
x225
64E
Prime Segment
*special problem
,
brute force
,
math
,
number theory
1800
x228
346E
Doodle Jump
math
,
number theory
3000
x233
1548D2
Gregor and the Odd Cows (Hard)
brute force
,
geometry
,
math
,
number theory
3300
x236
1016G
Appropriate Team
bitmasks
,
math
,
number theory
2700
x252
303D
Rotatable Number
math
,
number theory
2600
x275
449E
Jzzhu and Squares
dp
,
math
,
number theory
2900
x279
1027G
X-mouse in the Campus
bitmasks
,
math
,
number theory
2600
x291
294D
Shaass and Painter Robot
brute force
,
implementation
,
number theory
2500
x294
1698G
Long Binary String
bitmasks
,
math
,
matrices
,
meet-in-the-middle
,
number theory
2900
x296
1644F
Basis
combinatorics
,
fft
,
math
,
number theory
2900
x306
1468L
Prime Divisors Selection
binary search
,
greedy
,
math
,
number theory
2700
x307
1552H
Guess the Perimeter
binary search
,
interactive
,
number theory
3300
x311
1148G
Gold Experience
constructive algorithms
,
graphs
,
math
,
number theory
,
probabilities
3300
x311
1815E
Bosco and Particle
dp
,
math
,
number theory
,
strings
3100
x315
73E
Morrowindows
math
,
number theory
2400
x320
180B
Divisibility Rules
math
,
number theory
2300
x324
1806F1
GCD Master (easy version)
greedy
,
math
,
number theory
,
sortings
2900
x325
1182F
Maximum Sine
binary search
,
data structures
,
number theory
2700
x327
717A
Festival Organization
combinatorics
,
math
,
number theory
2900
x327
200E
Tractor College
implementation
,
math
,
number theory
,
ternary search
2400
x329
1845F
Swimmers in the Pool
dp
,
fft
,
math
,
number theory
2800
x336
1030G
Linear Congruential Generator
number theory
2900
x343
1418F
Equal Product
data structures
,
math
,
number theory
,
two pointers
3000
x346
1945H
GCD is Greater
brute force
,
data structures
,
math
,
number theory
2600
x365
185D
Visit of the Great
math
,
number theory
2600
x367
1493F
Enchanted Matrix
bitmasks
,
interactive
,
number theory
2600
x369
1562F
Tubular Bells
interactive
,
math
,
number theory
,
probabilities
2900
x372
360D
Levko and Sets
number theory
2600
x383
1656H
Equal LCM Subsets
data structures
,
math
,
number theory
3200
x389
1732E
Location
data structures
,
dp
,
math
,
number theory
2800
x401
1630E
Expected Components
combinatorics
,
math
,
number theory
,
probabilities
2900
x413
1725E
Electrical Efficiency
combinatorics
,
data structures
,
dp
,
math
,
number theory
,
trees
2500
x424
698F
Coprime Permutation
combinatorics
,
number theory
3000
x425
93E
Lostborn
dp
,
math
,
number theory
2600
x430
1835D
Doctor's Brown Hypothesis
dfs and similar
,
graphs
,
math
,
number theory
2900
x432
306C
White, Black and White Again
combinatorics
,
number theory
2100
x434
1879F
Last Man Standing
brute force
,
data structures
,
number theory
2800
x462
1798F
Gifts from Grandfather Ahmed
dp
,
math
,
number theory
2500
x462
722F
Cyclic Cipher
chinese remainder theorem
,
data structures
,
implementation
,
number theory
,
two pointers
2800
x468
516E
Drazil and His Happy Friends
math
,
number theory
3100
x469
271E
Three Horses
constructive algorithms
,
math
,
number theory
2200
x475
1436F
Sum Over Subsets
combinatorics
,
math
,
number theory
2800
x478
1630F
Making It Bipartite
flows
,
graph matchings
,
graphs
,
number theory
3400
x482
1045B
Space Isaac
hashing
,
number theory
2400
x484
1109E
Sasha and a Very Easy Test
data structures
,
number theory
2700
x486
542D
Superhero's Job
dfs and similar
,
dp
,
hashing
,
math
,
number theory
2600
x489
653G
Move by Prime
combinatorics
,
math
,
number theory
3100
x511
896D
Nephren Runs a Cinema
chinese remainder theorem
,
combinatorics
,
math
,
number theory
2900
x514
283D
Cows and Cool Sequences
dp
,
math
,
number theory
2400
x518
1225G
To Make 1
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
number theory
3100
x520
986F
Oppa Funcan Style Remastered
graphs
,
math
,
number theory
,
shortest paths
3300
x531
215E
Periodical Numbers
combinatorics
,
dp
,
number theory
2100
x532
1801F
Another n-dimensional chocolate bar
dp
,
math
,
meet-in-the-middle
,
number theory
2700
x535
216E
Martian Luck
math
,
number theory
2000
x539
852F
Product transformation
combinatorics
,
math
,
number theory
2200
x540
293C
Cube Problem
brute force
,
math
,
number theory
2400
x548
1582G
Kuzya and Homework
data structures
,
number theory
2600
x555
963C
Cutting Rectangle
brute force
,
math
,
number theory
2600
x557
1257G
Divisor Set
divide and conquer
,
fft
,
greedy
,
math
,
number theory
2600
x563
1684G
Euclid Guess
constructive algorithms
,
flows
,
graph matchings
,
math
,
number theory
2800
x564
665F
Four Divisors
data structures
,
dp
,
math
,
number theory
,
sortings
,
two pointers
2400
x571
1622F
Quadratic Set
constructive algorithms
,
hashing
,
math
,
number theory
2900
x578
364C
Beautiful Set
brute force
,
number theory
2300
x580
1770F
Koxia and Sequence
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
3100
x581
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