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Rayan
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Rayan Programming Contest 2024 - Selection (Codeforces Round, Div. 1 + Div. 2)
5 days
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*has extra registration
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Difficulty:
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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
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Custom test
Problems
#
Name
335A
Banana
binary search
,
constructive algorithms
,
greedy
1400
x2594
334B
Eight Point Sets
sortings
1400
x3608
333B
Chips
greedy
1800
x2653
333A
Secrets
greedy
1600
x4052
332B
Maximum Absurdity
data structures
,
dp
,
implementation
1500
x8056
331B1
Shave Beaver!
implementation
1700
x738
331A2
Oh Sweet Beaverette
data structures
,
sortings
1500
x1423
331A1
Oh Sweet Beaverette
brute force
,
implementation
1400
x1385
329B
Biridian Forest
dfs and similar
,
shortest paths
1500
x6466
329A
Purification
constructive algorithms
,
greedy
1500
x4653
328B
Sheldon and Ice Pieces
greedy
1500
x1351
328A
IQ Test
implementation
1800
x2087
327C
Magic Five
combinatorics
,
math
1700
x3228
325B
Stadium and Games
binary search
,
math
1800
x1568
325A
Square and Rectangles
implementation
1500
x2164
323A
Black-and-White Cube
combinatorics
,
constructive algorithms
1600
x747
322B
Ciel and Flowers
combinatorics
,
math
1600
x11875
321A
Ciel and Robot
binary search
,
implementation
,
math
1700
x3650
320B
Ping-Pong (Easy Version)
dfs and similar
,
graphs
1500
x7275
319A
Malek Dance Club
combinatorics
,
math
1600
x2804
317A
Perfect Pair
brute force
1600
x4666
316G1
Good Substrings
hashing
,
strings
1700
x967
316E1
Summer Homework
brute force
,
data structures
1500
x1486
316B2
EKG
dfs and similar
,
dp
1600
x1593
316B1
EKG
brute force
,
dfs and similar
1500
x1378
316A2
Special Task
math
1400
x2150
315A
Sereja and Bottles
brute force
1400
x11221
314A
Sereja and Contest
implementation
1600
x2079
313C
Ilya and Matrix
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x5658
305C
Ivan and Powers of Two
greedy
,
implementation
1600
x2458
305B
Continued Fractions
brute force
,
implementation
,
math
1700
x2152
305A
Strange Addition
brute force
,
constructive algorithms
,
implementation
1600
x4807
303B
Rectangle Puzzle II
implementation
,
math
1700
x1347
301A
Yaroslav and Sequence
constructive algorithms
1800
x3088
300C
Beautiful Numbers
brute force
,
combinatorics
1800
x9661
300B
Coach
brute force
,
dfs and similar
,
graphs
1500
x6370
297B
Fish Weight
constructive algorithms
,
greedy
1600
x3507
297A
Parity Game
constructive algorithms
1700
x3628
295B
Greg and Graph
dp
,
graphs
,
shortest paths
1700
x14358
295A
Greg and Array
data structures
,
implementation
1400
x18295
294B
Shaass and Bookshelf
dp
,
greedy
1700
x4570
293A
Weird Game
games
,
greedy
1500
x2905
291D
Parallel Programming
*special problem
,
greedy
1600
x1480
291C
Network Mask
*special problem
,
bitmasks
,
brute force
,
implementation
1600
x1683
290D
Orange
*special problem
,
implementation
1400
x1804
290C
WTF?
*special problem
,
graph matchings
,
implementation
,
trees
1700
x1550
290B
QR code
*special problem
,
implementation
1500
x2446
290A
Mysterious strings
*special problem
,
implementation
1400
x3004
289B
Polo the Penguin and Matrix
brute force
,
dp
,
implementation
,
sortings
,
ternary search
1400
x17426
288C
Polo the Penguin and XOR operation
implementation
,
math
1700
x2307
288B
Polo the Penguin and Houses
combinatorics
1500
x2941
287B
Pipeline
binary search
,
math
1700
x9901
286A
Lucky Permutation
constructive algorithms
,
math
1400
x3186
284A
Cows and Primitive Roots
implementation
,
math
,
number theory
1400
x6610
283B
Cow Program
dfs and similar
,
dp
,
graphs
1700
x3671
283A
Cows and Sequence
constructive algorithms
,
data structures
,
implementation
1600
x6585
282C
XOR and OR
constructive algorithms
,
implementation
,
math
1500
x9443
282B
Painting Eggs
greedy
,
math
1500
x13028
281B
Nearest Fraction
brute force
,
implementation
,
two pointers
1700
x3036
280B
Maximum Xor Secondary
data structures
,
implementation
,
two pointers
1800
x4743
279C
Ladder
dp
,
implementation
,
two pointers
1700
x8292
279B
Books
binary search
,
brute force
,
implementation
,
two pointers
1400
x54041
279A
Point on Spiral
brute force
,
geometry
,
implementation
1400
x5622
278B
New Problem
brute force
,
strings
1500
x3463
277A
Learning Languages
dfs and similar
,
dsu
1400
x19065
276D
Little Girl and Maximum XOR
bitmasks
,
dp
,
greedy
,
implementation
,
math
1700
x13969
276C
Little Girl and Maximum Sum
data structures
,
greedy
,
implementation
,
sortings
1500
x27246
275B
Convex Shape
constructive algorithms
,
implementation
1700
x2827
274B
Zero Tree
dfs and similar
,
dp
,
greedy
,
trees
1800
x5044
274A
k-Multiple Free Set
binary search
,
greedy
,
sortings
1500
x10108
272D
Dima and Two Sequences
combinatorics
,
math
,
sortings
1600
x2630
272C
Dima and Staircase
data structures
,
implementation
1500
x6805
272B
Dima and Sequence
implementation
,
math
1400
x4035
271D
Good Substrings
data structures
,
strings
1800
x11498
271C
Secret
constructive algorithms
,
implementation
1500
x2999
270B
Multithreading
data structures
,
greedy
,
implementation
1400
x4184
269B
Greenhouse Effect
dp
1700
x6347
269A
Magical Boxes
greedy
,
math
1600
x3535
268C
Beautiful Sets of Points
constructive algorithms
,
implementation
1500
x13704
264B
Good Sequences
dp
,
number theory
1500
x10374
263D
Cycle in Graph
dfs and similar
,
graphs
1800
x3639
261A
Maxim and Discounts
greedy
,
sortings
1400
x5209
260C
Balls and Boxes
constructive algorithms
,
greedy
,
implementation
1700
x2986
260B
Ancient Prophesy
brute force
,
implementation
,
strings
1600
x3829
260A
Adding Digits
implementation
,
math
1400
x14873
257C
View Angle
brute force
,
geometry
,
math
1800
x4389
255D
Mr. Bender and Square
binary search
,
implementation
,
math
1800
x2011
255C
Almost Arithmetical Progression
brute force
,
dp
1500
x4732
254C
Anagram
greedy
,
strings
1800
x1501
254B
Jury Size
brute force
,
implementation
1500
x2161
253C
Text Editor
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1600
x2616
253B
Physics Practical
binary search
,
dp
,
sortings
,
two pointers
1400
x10817
252B
Unsorting Array
brute force
,
sortings
1800
x1721
251B
Playing with Permutations
implementation
,
math
1800
x1276
250C
Movie Critics
greedy
1600
x1951
250B
Restoring IPv6
implementation
,
strings
1500
x1997
248B
Chilly Willy
math
,
number theory
1400
x5347
246D
Colorful Graph
brute force
,
dfs and similar
,
graphs
1600
x9488
246C
Beauty Pageant
brute force
,
constructive algorithms
,
greedy
1600
x2636
245H
Queries for Number of Palindromes
dp
,
hashing
,
strings
1800
x6849
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