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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
39:07:35
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Difficulty:
—
greedy
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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Status
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Custom test
Problems
#
Name
309C
Memory for Arrays
binary search
,
bitmasks
,
greedy
1900
x1366
306B
Optimizer
data structures
,
greedy
,
sortings
2100
x445
305C
Ivan and Powers of Two
greedy
,
implementation
1600
x2457
298B
Sail
brute force
,
greedy
,
implementation
1200
x14265
298A
Snow Footprints
greedy
,
implementation
1300
x10980
297B
Fish Weight
constructive algorithms
,
greedy
1600
x3507
296A
Yaroslav and Permutations
greedy
,
math
1100
x23305
294B
Shaass and Bookshelf
dp
,
greedy
1700
x4570
293A
Weird Game
games
,
greedy
1500
x2905
291D
Parallel Programming
*special problem
,
greedy
1600
x1480
290F
Greedy Petya
*special problem
,
dfs and similar
,
graphs
,
greedy
2800
x134
288A
Polo the Penguin and Strings
greedy
1300
x6514
286C
Main Sequence
greedy
,
implementation
2100
x1514
285C
Building Permutation
greedy
,
implementation
,
sortings
1200
x23405
285A
Slightly Decreasing Permutations
greedy
,
implementation
1100
x13385
282B
Painting Eggs
greedy
,
math
1500
x13025
279E
Beautiful Decomposition
dp
,
games
,
greedy
,
number theory
1900
x1449
276D
Little Girl and Maximum XOR
bitmasks
,
dp
,
greedy
,
implementation
,
math
1700
x13953
276C
Little Girl and Maximum Sum
data structures
,
greedy
,
implementation
,
sortings
1500
x27193
276B
Little Girl and Game
games
,
greedy
1300
x28797
274D
Lovely Matrix
dfs and similar
,
graphs
,
greedy
,
sortings
2200
x1043
274B
Zero Tree
dfs and similar
,
dp
,
greedy
,
trees
1800
x5043
274A
k-Multiple Free Set
binary search
,
greedy
,
sortings
1500
x10103
270B
Multithreading
data structures
,
greedy
,
implementation
1400
x4182
269C
Flawed Flow
constructive algorithms
,
flows
,
graphs
,
greedy
2100
x1687
269A
Magical Boxes
greedy
,
math
1600
x3535
266C
Below the Diagonal
constructive algorithms
,
greedy
,
math
2100
x1354
265B
Roadside Trees (Simplified Edition)
greedy
,
implementation
1000
x17262
263B
Squares
greedy
,
implementation
,
sortings
900
x9004
262B
Roma and Changing Signs
greedy
1200
x11437
261A
Maxim and Discounts
greedy
,
sortings
1400
x5208
260D
Black and White Tree
constructive algorithms
,
dsu
,
graphs
,
greedy
,
trees
2100
x1556
260C
Balls and Boxes
constructive algorithms
,
greedy
,
implementation
1700
x2986
258A
Little Elephant and Bits
greedy
,
math
1100
x23101
257D
Sum
greedy
,
math
1900
x1610
257B
Playing Cubes
games
,
greedy
,
implementation
1300
x7122
257A
Sockets
greedy
,
implementation
,
sortings
1100
x6497
254C
Anagram
greedy
,
strings
1800
x1501
253C
Text Editor
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1600
x2616
253A
Boys and Girls
greedy
1100
x11292
251C
Number Transformation
dp
,
greedy
,
number theory
2000
x1036
250C
Movie Critics
greedy
1600
x1951
250A
Paper Work
greedy
1000
x4143
248D
Sweets for Everyone!
binary search
,
greedy
,
implementation
2300
x500
246C
Beauty Pageant
brute force
,
constructive algorithms
,
greedy
1600
x2636
246B
Increase and Decrease
greedy
,
math
1300
x11358
246A
Buggy Sorting
constructive algorithms
,
greedy
,
sortings
900
x9309
245E
Mishap in Club
greedy
,
implementation
1400
x3297
245D
Restoring Table
constructive algorithms
,
greedy
1500
x2323
245C
Game with Coins
greedy
1700
x1551
242D
Dispute
dfs and similar
,
graphs
,
greedy
2100
x1881
241A
Old Peykan
greedy
1300
x2243
240E
Road Repairs
dfs and similar
,
graphs
,
greedy
2800
x356
239A
Two Bags of Potatoes
greedy
,
implementation
,
math
1200
x19027
238C
World Eater Brothers
dfs and similar
,
dp
,
greedy
,
trees
2100
x1247
237D
T-decomposition
dfs and similar
,
graphs
,
greedy
,
trees
2000
x567
234H
Merging Two Decks
constructive algorithms
,
greedy
2000
x568
232A
Cycles
binary search
,
constructive algorithms
,
graphs
,
greedy
1600
x2549
231B
Magic, Wizardry and Wonders
constructive algorithms
,
greedy
1500
x3624
231A
Team
brute force
,
greedy
800
x332637
230A
Dragons
greedy
,
sortings
1000
x80271
229D
Towers
dp
,
greedy
,
two pointers
2100
x2275
226D
The table
constructive algorithms
,
greedy
2100
x967
226B
Naughty Stone Piles
greedy
1900
x1566
225B
Well-known Numbers
binary search
,
greedy
,
number theory
1600
x3163
225A
Dice Tower
constructive algorithms
,
greedy
1100
x11783
222D
Olympiad
binary search
,
greedy
,
sortings
,
two pointers
1900
x2173
219C
Color Stripe
brute force
,
dp
,
greedy
1600
x6677
216C
Hiring Staff
greedy
1800
x1853
215D
Hot Days
greedy
1900
x1604
215B
Olympic Medal
greedy
,
math
1300
x5602
214B
Hometask
brute force
,
constructive algorithms
,
greedy
,
math
1600
x4984
213A
Game
dfs and similar
,
greedy
1700
x1726
209C
Trails and Glades
constructive algorithms
,
dsu
,
graphs
,
greedy
2400
x754
207A3
Beaver's Calculator 1.0
greedy
2000
x217
207A2
Beaver's Calculator 1.0
greedy
1800
x243
207A1
Beaver's Calculator 1.0
greedy
1600
x296
205B
Little Elephant and Sorting
brute force
,
greedy
1400
x6045
203E
Transportation
greedy
,
sortings
,
two pointers
2300
x281
203C
Photographer
greedy
,
sortings
1400
x5702
202A
LLPS
binary search
,
bitmasks
,
brute force
,
greedy
,
implementation
,
strings
800
x17005
196D
The Next Good String
data structures
,
greedy
,
hashing
,
strings
2800
x539
196A
Lexicographically Maximum Subsequence
greedy
,
strings
1100
x5410
193C
Hamming Distance
constructive algorithms
,
greedy
,
math
,
matrices
2400
x517
191D
Metro Scheme
graphs
,
greedy
2700
x365
191B
Demonstration
greedy
1700
x1013
190A
Vasya and the Bus
greedy
,
math
1100
x5896
187E
Heaven Tour
data structures
,
greedy
2900
x104
187A
Permutations
greedy
1500
x2816
186B
Growing Mushrooms
greedy
,
sortings
1200
x5613
183E
Candy Shop
greedy
2900
x138
183D
T-shirt
dp
,
greedy
,
probabilities
2700
x403
182C
Optimal Sum
data structures
,
greedy
2000
x742
180D
Name
greedy
,
strings
1900
x732
178A3
Educational Game
greedy
1100
x1457
178A2
Educational Game
greedy
1000
x1640
176A
Trading Business
greedy
,
sortings
1200
x1514
175E
Power Defence
brute force
,
dp
,
geometry
,
greedy
2600
x266
175C
Geometry Horse
greedy
,
implementation
,
sortings
,
two pointers
1600
x1319
174C
Range Increments
data structures
,
greedy
1800
x1102
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