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Codeforces Round 1134 (Div. 4)
34:17:08
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combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
communication
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
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x297332
337A
Puzzles
greedy
900
x100092
336A
Vasily the Bear and Triangle
implementation
,
math
1000
x10841
334A
Candy Bags
implementation
1000
x20462
331C1
The Great Julya Calendar
dp
1100
x7265
330A
Cakeminator
brute force
,
implementation
800
x32301
327B
Hungry Sequence
math
1200
x22140
327A
Flipping Game
brute force
,
dp
,
implementation
1200
x53001
322A
Ciel and Dancing
greedy
1000
x9312
320A
Magic Numbers
brute force
,
greedy
900
x47055
318A
Even Odds
math
900
x151593
316A1
Special Task
greedy
1100
x2933
315B
Sereja and Array
implementation
1200
x7869
313B
Ilya and Queries
dp
,
implementation
1100
x59316
313A
Ilya and Bank Account
implementation
,
number theory
900
x67610
312A
Whose sentence is it?
implementation
,
strings
1100
x5479
306A
Candies
implementation
800
x8379
304A
Pythagorean Theorem II
brute force
,
math
1200
x12373
302B
Eugeny and Play List
binary search
,
implementation
,
two pointers
1200
x9634
302A
Eugeny and Array
implementation
800
x9917
300A
Array
brute force
,
constructive algorithms
,
implementation
1100
x28623
299B
Ksusha the Squirrel
brute force
,
implementation
900
x6730
299A
Ksusha and Array
brute force
,
number theory
,
sortings
1000
x9696
298B
Sail
brute force
,
greedy
,
implementation
1200
x16199
296A
Yaroslav and Permutations
greedy
,
math
1100
x26754
294A
Shaass and Oskols
implementation
,
math
800
x29317
292B
Network Topology
graphs
,
implementation
1200
x11174
292A
SMSC
implementation
1100
x2939
291A
Spyke Talks
*special problem
,
implementation
,
sortings
800
x6605
289A
Polo the Penguin and Segments
brute force
,
implementation
1100
x10591
287A
IQ Test
brute force
,
implementation
1100
x22469
285C
Building Permutation
greedy
,
implementation
,
sortings
1200
x26903
285B
Find Marble
implementation
1200
x15906
285A
Slightly Decreasing Permutations
greedy
,
implementation
1100
x14351
284B
Cows and Poker Game
brute force
,
implementation
1000
x7475
282A
Bit++
implementation
800
x390078
281A
Word Capitalization
implementation
,
strings
800
x290903
278A
Circle Line
implementation
800
x13005
276A
Lunch Rush
implementation
900
x30774
275A
Lights Out
implementation
900
x38019
272A
Dima and Friends
implementation
,
math
1000
x28412
271A
Beautiful Year
brute force
800
x191597
270A
Fancy Fence
geometry
,
implementation
,
math
1100
x52537
268B
Buttons
implementation
,
math
1000
x36646
268A
Games
brute force
800
x109536
267A
Subtractions
math
,
number theory
900
x9941
266B
Queue at the School
constructive algorithms
,
graph matchings
,
implementation
,
shortest paths
800
x176563
266A
Stones on the Table
implementation
800
x263345
265B
Roadside Trees (Simplified Edition)
greedy
,
implementation
1000
x18081
265A
Colorful Stones (Simplified Edition)
implementation
800
x44162
264A
Escape from Stones
constructive algorithms
,
data structures
,
implementation
,
two pointers
1200
x11992
263B
Squares
greedy
,
implementation
,
sortings
900
x9986
263A
Beautiful Matrix
implementation
800
x343428
262B
Roma and Changing Signs
greedy
1200
x12565
262A
Roma and Lucky Numbers
implementation
800
x22797
259B
Little Elephant and Magic Square
brute force
,
implementation
1100
x14827
259A
Little Elephant and Chess
brute force
,
strings
1000
x10245
258A
Little Elephant and Bits
greedy
,
math
1100
x27208
257A
Sockets
greedy
,
implementation
,
sortings
1100
x7036
255B
Code Parsing
implementation
1200
x5570
255A
Greg's Workout
implementation
800
x31717
254A
Cards with Numbers
constructive algorithms
,
sortings
1200
x7920
253A
Boys and Girls
greedy
1100
x12401
252A
Little Xor
brute force
,
implementation
1100
x6005
250A
Paper Work
greedy
1000
x5001
248A
Cupboards
implementation
800
x25760
246A
Buggy Sorting
constructive algorithms
,
greedy
,
sortings
900
x10425
245B
Internet Address
implementation
,
strings
1100
x5581
245A
System Administrator
implementation
800
x9267
244A
Dividing Orange
implementation
900
x8736
242B
Big Segment
implementation
,
sortings
1100
x17653
242A
Heads or Tails
brute force
,
implementation
1100
x6950
239A
Two Bags of Potatoes
greedy
,
implementation
,
math
1200
x21071
237A
Free Cash
implementation
1000
x30232
236A
Boy or Girl
brute force
,
implementation
,
strings
800
x304251
234B
Reading
sortings
1000
x7831
234A
Lefthanders and Righthanders
implementation
1200
x4759
233A
Perfect Permutation
implementation
,
math
800
x50756
231A
Team
brute force
,
greedy
800
x467672
230A
Dragons
greedy
,
sortings
1000
x105965
228A
Is your horseshoe on the other hoof?
implementation
800
x149290
227B
Effective Approach
implementation
1100
x33715
225A
Dice Tower
constructive algorithms
,
greedy
1100
x14964
224A
Parallelepiped
brute force
,
geometry
,
math
1100
x31303
222A
Shooshuns and Sequence
brute force
,
implementation
1200
x12107
221A
Little Elephant and Function
implementation
,
math
1000
x17150
219A
k-String
implementation
,
strings
1000
x33544
218B
Airport
implementation
1100
x18885
218A
Mountain Scenery
brute force
,
constructive algorithms
,
implementation
1100
x10814
217A
Ice Skating
brute force
,
dfs and similar
,
dsu
,
graphs
1200
x26172
216A
Tiling with Hexagons
implementation
,
math
1200
x5375
215A
Bicycle Chain
brute force
,
implementation
900
x16501
214A
System of Equations
brute force
800
x44868
208D
Prizes, Prizes, more Prizes
implementation
1200
x8147
208A
Dubstep
strings
900
x109734
205A
Little Elephant and Rozdil
brute force
,
implementation
900
x25830
203A
Two Problems
brute force
,
implementation
1200
x4512
202A
LLPS
binary search
,
bitmasks
,
brute force
,
greedy
,
implementation
,
strings
800
x20487
200B
Drinks
implementation
,
math
800
x158411
199A
Hexadecimal's theorem
brute force
,
constructive algorithms
,
implementation
,
number theory
900
x31310
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