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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
10:16:49
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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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Custom test
Problems
#
Name
1352B
Same Parity Summands
constructive algorithms
,
math
1200
x38104
1352A
Sum of Round Numbers
implementation
,
math
800
x81289
1351B
Square?
brute force
,
implementation
,
math
900
x17121
1350B
Orac and Models
dp
,
math
,
number theory
1400
x22549
1350A
Orac and Factors
math
900
x26148
1349F2
Slime and Sequences (Hard Version)
dp
,
fft
,
math
3500
x115
1349F1
Slime and Sequences (Easy Version)
dp
,
fft
,
math
3100
x419
1349D
Slime and Biscuits
math
,
probabilities
3200
x924
1349B
Orac and Medians
constructive algorithms
,
greedy
,
math
2000
x8206
1349A
Orac and LCM
data structures
,
math
,
number theory
1600
x17322
1348E
Phoenix and Berries
brute force
,
dp
,
greedy
,
math
2400
x2249
1348D
Phoenix and Science
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
1900
x8913
1348A
Phoenix and Balance
greedy
,
math
800
x39795
1346G
Two IP Cameras
*special problem
,
math
,
number theory
2300
x135
1346F
Dune II: Battle For Arrakis
*special problem
,
data structures
,
greedy
,
math
2000
x228
1346A
Color Revolution
*special problem
,
math
1000
x2043
1345B
Card Constructions
binary search
,
brute force
,
dp
,
math
1100
x26627
1345A
Puzzle Pieces
math
800
x24245
1344D
Résumé Review
binary search
,
greedy
,
math
2700
x1172
1344C
Quantifier Question
dfs and similar
,
dp
,
graphs
,
math
2600
x1867
1344A
Hilbert's Hotel
math
,
number theory
,
sortings
1600
x15701
1343B
Balanced Array
constructive algorithms
,
math
800
x57154
1343A
Candies
brute force
,
math
900
x48381
1342E
Placing Rooks
combinatorics
,
fft
,
math
2300
x3118
1342C
Yet Another Counting Problem
math
,
number theory
1600
x14100
1342A
Road To Zero
greedy
,
math
1000
x40967
1341A
Nastya and Rice
math
900
x29131
1339A
Filling Diamonds
brute force
,
dp
,
implementation
,
math
900
x32221
1338D
Nested Rubber Bands
constructive algorithms
,
dfs and similar
,
dp
,
math
,
trees
2700
x1027
1338C
Perfect Triples
bitmasks
,
brute force
,
constructive algorithms
,
divide and conquer
,
math
2200
x3239
1338B
Edge Weight Assignment
bitmasks
,
constructive algorithms
,
dfs and similar
,
greedy
,
math
,
trees
1800
x8519
1338A
Powered Addition
greedy
,
math
1500
x24350
1337B
Kana and Dragon Quest game
greedy
,
implementation
,
math
900
x34448
1337A
Ichihime and Triangle
constructive algorithms
,
math
800
x38650
1336E2
Chiori and Doll Picking (hard version)
bitmasks
,
brute force
,
combinatorics
,
math
3500
x308
1336E1
Chiori and Doll Picking (easy version)
bitmasks
,
brute force
,
combinatorics
,
math
2700
x691
1336B
Xenia and Colorful Gems
binary search
,
greedy
,
math
,
sortings
,
two pointers
1700
x11419
1335A
Candies and Two Sisters
math
800
x86243
1334E
Divisor Paths
combinatorics
,
graphs
,
greedy
,
math
,
number theory
2200
x2854
1334C
Circle of Monsters
brute force
,
constructive algorithms
,
greedy
,
math
1600
x16735
1334A
Level Statistics
implementation
,
math
1200
x23363
1333F
Kate and imperfection
greedy
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2200
x4286
1332E
Height All the Same
combinatorics
,
constructive algorithms
,
math
,
matrices
2100
x3877
1332D
Walk on Matrix
bitmasks
,
constructive algorithms
,
math
1700
x8201
1332B
Composite Coloring
brute force
,
constructive algorithms
,
greedy
,
math
,
number theory
1400
x17680
1332A
Exercising Walk
greedy
,
implementation
,
math
1100
x19440
1331B
Limericks
*special problem
,
math
,
number theory
x7014
1330B
Dreamoon Likes Permutations
implementation
,
math
1400
x14091
1329B
Dreamoon Likes Sequences
bitmasks
,
combinatorics
,
math
1700
x6716
1329A
Dreamoon Likes Coloring
constructive algorithms
,
greedy
,
implementation
,
math
1800
x9182
1328D
Carousel
constructive algorithms
,
dp
,
graphs
,
greedy
,
math
1800
x13293
1328B
K-th Beautiful String
binary search
,
brute force
,
combinatorics
,
implementation
,
math
1300
x29330
1328A
Divisibility Problem
math
800
x104748
1327E
Count The Blocks
combinatorics
,
dp
,
math
1800
x9002
1327D
Infinite Path
brute force
,
dfs and similar
,
graphs
,
math
,
number theory
2200
x3297
1327A
Sum of Odd Integers
math
1100
x39429
1326F2
Wise Men (Hard Version)
bitmasks
,
dp
,
math
3200
x486
1326C
Permutation Partitions
combinatorics
,
greedy
,
math
1300
x15682
1326B
Maximums
implementation
,
math
900
x24134
1322C
Instant Noodles
graphs
,
hashing
,
math
,
number theory
2300
x2491
1322B
Present
binary search
,
bitmasks
,
constructive algorithms
,
data structures
,
math
,
sortings
2100
x4258
1320A
Journey Planning
data structures
,
dp
,
greedy
,
math
,
sortings
1400
x16609
1316C
Primitive Primes
constructive algorithms
,
math
,
ternary search
1800
x7309
1313B
Different Rules
constructive algorithms
,
greedy
,
implementation
,
math
1700
x6715
1312D
Count the Arrays
combinatorics
,
math
1700
x9557
1312C
Adding Powers
bitmasks
,
greedy
,
implementation
,
math
,
number theory
,
ternary search
1400
x16660
1312A
Two Regular Polygons
geometry
,
greedy
,
math
,
number theory
800
x26039
1311D
Three Integers
brute force
,
math
2000
x9131
1311A
Add Odd or Subtract Even
greedy
,
implementation
,
math
800
x42357
1310F
Bad Cryptography
math
,
number theory
3400
x77
1307E
Cow and Treats
binary search
,
combinatorics
,
dp
,
greedy
,
implementation
,
math
2500
x1287
1307C
Cow and Message
brute force
,
dp
,
math
,
strings
1500
x11883
1307B
Cow and Friend
geometry
,
greedy
,
math
1300
x13331
1305F
Kuroni and the Punishment
math
,
number theory
,
probabilities
2500
x2723
1305E
Kuroni and the Score Distribution
constructive algorithms
,
greedy
,
implementation
,
math
2200
x3137
1305C
Kuroni and Impossible Calculation
brute force
,
combinatorics
,
math
,
number theory
1600
x14913
1304A
Two Rabbits
math
800
x25607
1303B
National Project
math
1400
x15862
1301C
Ayoub's function
binary search
,
combinatorics
,
greedy
,
math
,
strings
1700
x9385
1300A
Non-zero
implementation
,
math
800
x21076
1299E
So Mean
interactive
,
math
3400
x164
1299D
Around the World
bitmasks
,
combinatorics
,
dfs and similar
,
dp
,
graphs
,
graphs
,
math
,
trees
3000
x449
1299A
Anu Has a Function
brute force
,
greedy
,
math
1500
x12071
1297G
M-numbers
*special problem
,
dp
,
math
x70
1296B
Food Buying
math
900
x30448
1296A
Array with Odd Sum
math
800
x42395
1295D
Same GCDs
math
,
number theory
1800
x9033
1295B
Infinite Prefixes
math
,
strings
1700
x9348
1294E
Obtain a Permutation
greedy
,
implementation
,
math
1900
x4965
1294D
MEX maximizing
data structures
,
greedy
,
implementation
,
math
1600
x11817
1294C
Product of Three Numbers
greedy
,
math
,
number theory
1300
x35399
1294A
Collecting Coins
math
800
x47368
1293B
JOE is on TV!
combinatorics
,
greedy
,
math
1000
x21312
1292E
Rin and The Unknown Flower
constructive algorithms
,
greedy
,
interactive
,
math
3500
x370
1292D
Chaotic V.
dp
,
graphs
,
greedy
,
math
,
number theory
,
trees
2700
x820
1291A
Even But Not Even
greedy
,
math
,
strings
900
x19632
1288B
Yet Another Meme Problem
math
1100
x17108
1288A
Deadline
binary search
,
brute force
,
math
,
ternary search
1100
x18434
1286F
Harry The Potter
brute force
,
constructive algorithms
,
dp
,
fft
,
implementation
,
math
3100
x247
1286D
LCC
data structures
,
math
,
matrices
,
probabilities
3100
x618
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