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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
4 days
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binary search
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
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Name
996B
World Cup
binary search
,
math
1300
x8861
1315B
Homecoming
binary search
,
dp
,
greedy
,
strings
1300
x8965
1737B
Ela's Fitness and the Luxury Number
binary search
,
implementation
,
math
1300
x9208
1119B
Alyona and a Narrow Fridge
binary search
,
flows
,
greedy
,
sortings
1300
x9885
192A
Funky Numbers
binary search
,
brute force
,
implementation
1300
x10153
1870C
Colorful Table
binary search
,
data structures
,
dp
,
implementation
,
math
,
two pointers
1300
x10776
1807E
Interview
binary search
,
implementation
,
interactive
1300
x11945
1187B
Letters Shop
binary search
,
implementation
,
strings
1300
x11995
1076C
Meme Problem
binary search
,
math
1300
x12109
271B
Prime Matrix
binary search
,
brute force
,
math
,
number theory
1300
x12443
1794C
Scoring Subsequences
binary search
,
greedy
,
math
,
two pointers
1300
x12545
1279B
Verse For Santa
binary search
,
brute force
,
implementation
1300
x13364
1561C
Deep Down Below
binary search
,
greedy
,
sortings
1300
x13589
1913C
Game with Multiset
binary search
,
bitmasks
,
brute force
,
greedy
1300
x13767
1873F
Money Trees
binary search
,
greedy
,
math
,
two pointers
1300
x13952
96B
Lucky Numbers (easy)
binary search
,
bitmasks
,
brute force
1300
x14509
1736C1
Good Subarrays (Easy Version)
binary search
,
data structures
,
schedules
,
two pointers
1300
x14556
1617C
Paprika and Permutation
binary search
,
greedy
,
math
,
sortings
1300
x14611
1217A
Creating a Character
binary search
,
math
1300
x14654
1260B
Obtain Two Zeroes
binary search
,
math
1300
x15113
1612C
Chat Ban
binary search
,
math
1300
x15913
1862D
Ice Cream Balls
binary search
,
combinatorics
,
constructive algorithms
,
math
1300
x16128
1498B
Box Fitting
binary search
,
bitmasks
,
data structures
,
greedy
1300
x16174
1574C
Slay the Dragon
binary search
,
greedy
,
sortings
,
ternary search
1300
x16587
251A
Points on Line
binary search
,
combinatorics
,
two pointers
1300
x16797
1703F
Yet Another Problem About Pairs Satisfying an Inequality
binary search
,
data structures
,
dp
,
greedy
,
sortings
1300
x18329
1927D
Find the Different Ones!
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
two pointers
1300
x18474
1476B
Inflation
binary search
,
brute force
,
greedy
,
math
1300
x19509
1470A
Strange Birthday Party
binary search
,
dp
,
greedy
,
sortings
,
two pointers
1300
x21328
1538C
Number of Pairs
binary search
,
data structures
,
math
,
two pointers
1300
x27124
600B
Queries about less or equal elements
binary search
,
data structures
,
sortings
,
two pointers
1300
x27573
1328B
K-th Beautiful String
binary search
,
brute force
,
combinatorics
,
implementation
,
math
1300
x28189
230B
T-primes
binary search
,
implementation
,
math
,
number theory
1300
x70325
424B
Megacity
binary search
,
greedy
,
implementation
,
sortings
1200
x7354
302B
Eugeny and Play List
binary search
,
implementation
,
two pointers
1200
x7797
732C
Sanatorium
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
1200
x9477
1100C
NN and the Optical Illusion
binary search
,
geometry
,
math
1200
x9736
1011B
Planning The Expedition
binary search
,
brute force
,
implementation
1200
x9813
911B
Two Cakes
binary search
,
brute force
,
implementation
1200
x11023
1951B
Battle Cows
binary search
,
data structures
,
greedy
1200
x12264
1848B
Vika and the Bridge
binary search
,
data structures
,
greedy
,
implementation
,
math
,
sortings
1200
x13469
1763B
Incinerate
binary search
,
brute force
,
data structures
,
implementation
,
math
,
sortings
1200
x13953
743B
Chloe and the sequence
binary search
,
bitmasks
,
constructive algorithms
,
implementation
1200
x14259
1530C
Pursuit
binary search
,
brute force
,
greedy
,
sortings
1200
x14261
1131C
Birthday
binary search
,
greedy
,
sortings
1200
x14559
637B
Chat Order
*special problem
,
binary search
,
constructive algorithms
,
data structures
,
sortings
1200
x15089
1886B
Fear of the Dark
binary search
,
geometry
,
math
1200
x15256
1928B
Equalize
binary search
,
greedy
,
sortings
,
two pointers
1200
x15431
1671C
Dolce Vita
binary search
,
brute force
,
greedy
,
math
1200
x15995
1860B
Fancy Coins
binary search
,
brute force
,
greedy
,
math
1200
x16105
1853B
Fibonaccharsis
binary search
,
brute force
,
math
1200
x16575
1692E
Binary Deque
binary search
,
implementation
,
two pointers
1200
x20088
1221C
Perfect Team
binary search
,
math
1200
x20180
1006C
Three Parts of the Array
binary search
,
data structures
,
two pointers
1200
x20340
1742E
Scuza
binary search
,
greedy
,
math
1200
x22167
1613C
Poisoned Dagger
binary search
1200
x22663
1354B
Ternary String
binary search
,
dp
,
implementation
,
two pointers
1200
x29347
474B
Worms
binary search
,
implementation
1200
x45039
1352C
K-th Not Divisible by n
binary search
,
math
1200
x50340
492B
Vanya and Lanterns
binary search
,
implementation
,
math
,
sortings
1200
x71482
755B
PolandBall and Game
binary search
,
data structures
,
games
,
greedy
,
sortings
,
strings
1100
x10949
1099B
Squares and Segments
binary search
,
constructive algorithms
,
math
1100
x10995
1884B
Haunted House
binary search
,
greedy
,
math
,
two pointers
1100
x11734
1042A
Benches
binary search
,
implementation
1100
x12521
1904B
Collecting Game
binary search
,
dp
,
greedy
,
sortings
,
two pointers
1100
x12986
1902B
Getting Points
binary search
,
brute force
,
greedy
1100
x13389
1293A
ConneR and the A.R.C. Markland-N
binary search
,
brute force
,
implementation
1100
x14986
166A
Rank List
binary search
,
implementation
,
sortings
1100
x16817
1288A
Deadline
binary search
,
brute force
,
math
,
ternary search
1100
x17894
1426C
Increase and Copy
binary search
,
constructive algorithms
,
math
1100
x19043
1862C
Flower City Fence
binary search
,
data structures
,
implementation
,
sortings
1100
x19753
1850E
Cardboard for Pictures
binary search
,
geometry
,
implementation
,
math
1100
x21009
1873E
Building an Aquarium
binary search
,
sortings
1100
x23238
1669F
Eating Candies
binary search
,
data structures
,
greedy
,
two pointers
1100
x23321
1463A
Dungeon
binary search
,
math
1100
x24523
1676E
Eating Queries
binary search
,
greedy
,
sortings
1100
x24761
1345B
Card Constructions
binary search
,
brute force
,
dp
,
math
1100
x25520
1324C
Frog Jumps
binary search
,
data structures
,
dfs and similar
,
greedy
,
implementation
1100
x26953
919B
Perfect Number
binary search
,
brute force
,
dp
,
implementation
,
number theory
1100
x26977
1366A
Shovels and Swords
binary search
,
greedy
,
math
1100
x29028
1490C
Sum of Cubes
binary search
,
brute force
,
brute force
,
math
1100
x31529
1335C
Two Teams Composing
binary search
,
greedy
,
implementation
,
sortings
1100
x33378
706B
Interesting drink
binary search
,
dp
,
implementation
1100
x58690
195A
Let's Watch Football
binary search
,
brute force
,
math
1000
x8496
1725B
Basketball Together
binary search
,
greedy
,
sortings
1000
x11832
1809B
Points on Plane
binary search
,
greedy
,
math
1000
x19078
1195B
Sport Mafia
binary search
,
brute force
,
math
1000
x19165
1419D1
Sage's Birthday (easy version)
binary search
,
constructive algorithms
,
greedy
,
sortings
1000
x23658
1593C
Save More Mice
binary search
,
greedy
,
greedy
1000
x24082
1744C
Traffic Light
binary search
,
implementation
,
two pointers
1000
x24416
978C
Letters
binary search
,
implementation
,
two pointers
1000
x24473
1474B
Different Divisors
binary search
,
constructive algorithms
,
greedy
,
math
,
number theory
1000
x26583
1476A
K-divisible Sum
binary search
,
constructive algorithms
,
greedy
,
math
1000
x35161
1138A
Sushi for Two
binary search
,
greedy
,
implementation
900
x17439
202A
LLPS
binary search
,
bitmasks
,
brute force
,
greedy
,
implementation
,
strings
800
x15918
1956A
Nene's Game
binary search
,
brute force
,
data structures
,
games
,
greedy
800
x19239
1592A
Gamer Hemose
binary search
,
greedy
,
math
,
sortings
800
x21650
1566A
Median Maximization
binary search
,
greedy
,
math
800
x22780
1611B
Team Composition: Programmers and Mathematicians
binary search
,
constructive algorithms
,
math
800
x28596
1915C
Can I Square?
binary search
,
implementation
800
x37886
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