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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
5 days
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→ Filter Problems
Difficulty:
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*combine tags by OR
greedy
implementation
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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Status
Standings
Custom test
Problems
#
Name
190A
Vasya and the Bus
greedy
,
math
1100
x5719
188D
Asterisks
*special problem
,
implementation
1100
x657
186B
Growing Mushrooms
greedy
,
sortings
1200
x5330
186A
Comparing Strings
implementation
,
strings
1100
x16256
182B
Vasya's Calendar
implementation
1000
x6803
180F
Mathematical Analysis Rocks!
constructive algorithms
,
implementation
,
math
1200
x2458
178A3
Educational Game
greedy
1100
x1395
178A2
Educational Game
greedy
1000
x1569
176A
Trading Business
greedy
,
sortings
1200
x1407
172B
Pseudorandom Sequence Period
*special problem
,
implementation
,
number theory
1200
x2691
169B
Replacing Digits
greedy
1100
x3195
166A
Rank List
binary search
,
implementation
,
sortings
1100
x16816
165A
Supercentral Point
implementation
1000
x22650
162A
Pentagonal numbers
*special problem
,
implementation
1100
x794
160B
Unlucky Ticket
greedy
,
sortings
1100
x13596
159B
Matchmaker
*special problem
,
greedy
,
sortings
1100
x3681
158B
Taxi
*special problem
,
greedy
,
implementation
1100
x82719
155B
Combination
greedy
,
sortings
1100
x10031
151B
Phone Numbers
implementation
,
strings
1200
x6233
145A
Lucky Conversion
greedy
,
implementation
1200
x6962
143B
Help Kingdom of Far Far Away 2
implementation
,
strings
1200
x4919
139A
Petr and Book
implementation
1000
x28799
137B
Permutation
greedy
1000
x13326
136B
Ternary Logic
implementation
,
math
1100
x4705
134A
Average Numbers
brute force
,
implementation
1200
x3811
133B
Unary
implementation
1200
x8645
131B
Opposites Attract
implementation
,
math
1200
x6867
131A
cAPS lOCK
implementation
,
strings
1000
x81537
129B
Students and Shoelaces
brute force
,
dfs and similar
,
graphs
,
implementation
1200
x11724
127B
Canvas Frames
implementation
1000
x8229
125B
Simple XML
implementation
1000
x2766
122B
Lucky Substring
brute force
,
implementation
1000
x12023
121A
Lucky Sum
implementation
1100
x8843
120C
Winnie-the-Pooh and honey
implementation
,
math
1100
x3587
120B
Quiz League
implementation
1100
x3341
120A
Elevator
brute force
,
implementation
,
math
1000
x4506
118B
Present from Lena
constructive algorithms
,
implementation
1000
x28459
118A
String Task
implementation
,
strings
1000
x182068
116B
Little Pigs and Wolves
greedy
,
implementation
1100
x13443
112B
Petya and Square
implementation
,
math
1200
x4072
109A
Lucky Sum of Digits
brute force
,
implementation
1000
x16665
108A
Palindromic Times
implementation
,
strings
1000
x9197
106B
Choosing Laptop
brute force
,
implementation
1000
x5944
106A
Card Game
implementation
1000
x7428
103A
Testing Pants for Sadness
greedy
,
implementation
,
math
1100
x5870
102B
Sum of Digits
implementation
1000
x24712
101A
Homework
greedy
1200
x3710
100A
Carpeting the Room
*special problem
,
implementation
1100
x892
90B
African Crossword
implementation
,
strings
1100
x5171
90A
Cableway
greedy
,
math
1000
x4519
88A
Chord
brute force
,
implementation
1200
x3740
82A
Double Cola
implementation
,
math
1100
x29505
79A
Bus Game
greedy
1200
x3981
78B
Easter Eggs
constructive algorithms
,
implementation
1200
x12778
75A
Life Without Zeros
implementation
1000
x25068
74A
Room Leader
implementation
1000
x4942
69B
Bets
greedy
,
implementation
1200
x3194
69A
Young Physicist
implementation
,
math
1000
x155792
68A
Irrational problem
implementation
,
number theory
1100
x4820
66B
Petya and Countryside
brute force
,
implementation
1100
x19565
63B
Settlers' Training
implementation
1200
x4716
59B
Fortune Telling
implementation
,
number theory
1200
x6694
58A
Chat room
greedy
,
strings
1000
x122765
56A
Bar
implementation
1000
x8347
55A
Flea travel
implementation
,
math
1200
x3342
53A
Autocomplete
implementation
1100
x4844
48B
Land Lot
brute force
,
implementation
1200
x2609
47B
Coins
implementation
1200
x13096
46B
T-shirts from Sponsor
implementation
1100
x3541
43B
Letter
implementation
,
strings
1100
x15768
38B
Chess
brute force
,
implementation
,
math
1200
x3413
35A
Shell Game
implementation
1000
x6626
33A
What is for dinner?
greedy
,
implementation
1200
x3866
31A
Worms Evolution
implementation
1200
x9955
27A
Next Test
implementation
,
sortings
1200
x19394
25B
Phone numbers
implementation
1100
x9343
23A
You're Given a String...
brute force
,
greedy
1200
x5088
18C
Stripe
data structures
,
implementation
1200
x12512
15A
Cottage Village
implementation
,
sortings
1200
x3617
14B
Young Photographer
implementation
1000
x6679
13A
Numbers
implementation
,
math
1000
x7380
12C
Fruits
greedy
,
implementation
,
sortings
1100
x5790
12B
Correct Solution?
implementation
,
sortings
1100
x8087
9C
Hexadecimal's Numbers
brute force
,
implementation
,
math
1200
x12400
9B
Running Student
brute force
,
geometry
,
implementation
1200
x5208
6C
Alice, Bob and Chocolate
greedy
,
two pointers
1200
x13057
6B
President's Office
implementation
1100
x12180
5B
Center Alignment
implementation
,
strings
1200
x5549
5A
Chat Servers Outgoing Traffic
implementation
1000
x9280
4B
Before an Exam
constructive algorithms
,
greedy
1200
x23735
3A
Shortest path of the king
greedy
,
shortest paths
1000
x18603
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