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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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Difficulty:
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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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Custom test
Problems
#
Name
234E
Champions' League
implementation
1600
x1002
234D
Cinema
implementation
1600
x1541
234C
Weather
dp
,
implementation
1300
x5568
234B
Reading
sortings
1000
x7135
234A
Lefthanders and Righthanders
implementation
1200
x4476
233B
Non-square Equation
binary search
,
brute force
,
math
1400
x7544
233A
Perfect Permutation
implementation
,
math
800
x43035
232E
Quick Tortoise
bitmasks
,
divide and conquer
,
dp
3000
x698
232D
Fence
binary search
,
data structures
,
string suffix structures
2900
x476
232C
Doe Graphs
constructive algorithms
,
divide and conquer
,
dp
,
graphs
,
shortest paths
2600
x291
232B
Table
bitmasks
,
combinatorics
,
dp
,
math
1900
x1481
232A
Cycles
binary search
,
constructive algorithms
,
graphs
,
greedy
1600
x2551
231E
Cactus
data structures
,
dfs and similar
,
dp
,
graphs
,
trees
2100
x1909
231D
Magic Box
brute force
,
geometry
1600
x4109
231C
To Add or Not to Add
binary search
,
sortings
,
two pointers
1600
x8685
231B
Magic, Wizardry and Wonders
constructive algorithms
,
greedy
1500
x3625
231A
Team
brute force
,
greedy
800
x333283
230B
T-primes
binary search
,
implementation
,
math
,
number theory
1300
x76777
230A
Dragons
greedy
,
sortings
1000
x80352
229E
Gifts
combinatorics
,
dp
,
math
,
probabilities
2600
x466
229D
Towers
dp
,
greedy
,
two pointers
2100
x2280
229C
Triangles
combinatorics
,
graphs
,
math
1900
x1630
229B
Planets
binary search
,
data structures
,
graphs
,
shortest paths
1700
x4728
229A
Shifts
brute force
,
two pointers
1500
x3529
228E
The Road to Berland is Paved With Good Intentions
2-sat
,
dfs and similar
,
dsu
,
graphs
1900
x2480
228D
Zigzag
data structures
2100
x386
228C
Fractal Detector
dp
,
hashing
2000
x455
228B
Two Tables
brute force
,
implementation
1400
x3469
228A
Is your horseshoe on the other hoof?
implementation
800
x112098
227B
Effective Approach
implementation
1100
x28324
227A
Where do I Turn?
geometry
1300
x4225
226E
Noble Knight's Path
data structures
,
trees
2900
x463
226D
The table
constructive algorithms
,
greedy
2100
x968
226C
Anniversary
data structures
,
implementation
,
math
,
matrices
,
number theory
2400
x914
226B
Naughty Stone Piles
greedy
1900
x1567
226A
Flying Saucer Segments
math
1400
x4013
225E
Unsolvable
math
,
number theory
2100
x807
225D
Snake
bitmasks
,
dfs and similar
,
graphs
,
implementation
2200
x949
225C
Barcode
dp
,
matrices
1700
x9218
225B
Well-known Numbers
binary search
,
greedy
,
number theory
1600
x3164
225A
Dice Tower
constructive algorithms
,
greedy
1100
x11807
224B
Array
bitmasks
,
implementation
,
two pointers
1500
x7361
224A
Parallelepiped
brute force
,
geometry
,
math
1100
x26990
223E
Planar Graph
flows
,
geometry
,
graphs
3000
x191
223D
Spider
geometry
,
graphs
3000
x70
223C
Partial Sums
combinatorics
,
math
,
number theory
1900
x1568
223B
Two Strings
data structures
,
dp
,
strings
1900
x1817
223A
Bracket Sequence
data structures
,
expression parsing
,
implementation
1700
x2541
222E
Decoding Genome
dp
,
matrices
1900
x2833
222D
Olympiad
binary search
,
greedy
,
sortings
,
two pointers
1900
x2173
222C
Reducing Fractions
implementation
,
math
,
number theory
,
sortings
1800
x2264
222B
Cosmic Tables
data structures
,
implementation
1300
x6138
222A
Shooshuns and Sequence
brute force
,
implementation
1200
x10844
221B
Little Elephant and Numbers
implementation
1300
x4589
221A
Little Elephant and Function
implementation
,
math
1000
x15310
220E
Little Elephant and Inversions
data structures
,
two pointers
2400
x1420
220D
Little Elephant and Triangle
geometry
,
math
2500
x286
220C
Little Elephant and Shifts
data structures
2100
x945
220B
Little Elephant and Array
constructive algorithms
,
data structures
1800
x10422
220A
Little Elephant and Problem
implementation
,
sortings
1300
x12024
219E
Parking Lot
data structures
2200
x620
219D
Choosing Capital for Treeland
dfs and similar
,
dp
,
graphs
,
trees
1700
x9653
219C
Color Stripe
brute force
,
dp
,
greedy
1600
x6679
219B
Special Offer! Super Price 999 Bourles!
implementation
1400
x5834
219A
k-String
implementation
,
strings
1000
x28093
218B
Airport
implementation
1100
x16587
218A
Mountain Scenery
brute force
,
constructive algorithms
,
implementation
1100
x9518
217E
Alien DNA
data structures
,
dsu
,
trees
2800
x325
217D
Bitonix' Patrol
bitmasks
,
brute force
,
combinatorics
,
dfs and similar
,
math
2900
x251
217C
Formurosa
divide and conquer
,
dp
,
expression parsing
2600
x338
217B
Blackboard Fibonacci
brute force
,
math
2100
x899
217A
Ice Skating
brute force
,
dfs and similar
,
dsu
,
graphs
1200
x21275
216E
Martian Luck
math
,
number theory
2000
x590
216D
Spider's Web
binary search
,
sortings
,
two pointers
1700
x1358
216C
Hiring Staff
greedy
1800
x1853
216B
Forming Teams
dfs and similar
,
implementation
1700
x6410
216A
Tiling with Hexagons
implementation
,
math
1200
x5025
215E
Periodical Numbers
combinatorics
,
dp
,
number theory
2100
x576
215D
Hot Days
greedy
1900
x1605
215C
Crosses
brute force
,
implementation
2100
x671
215B
Olympic Medal
greedy
,
math
1300
x5605
215A
Bicycle Chain
brute force
,
implementation
900
x14607
214B
Hometask
brute force
,
constructive algorithms
,
greedy
,
math
1600
x4985
214A
System of Equations
brute force
800
x35865
213E
Two Permutations
data structures
,
hashing
,
strings
2700
x836
213D
Stars
constructive algorithms
,
geometry
2300
x341
213C
Relay Race
dp
2000
x2895
213B
Numbers
combinatorics
,
dp
1900
x1787
213A
Game
dfs and similar
,
greedy
1700
x1726
212E
IT Restaurants
dfs and similar
,
dp
,
trees
1500
x1770
212D
Cutting a Fence
binary search
,
data structures
,
dsu
2500
x519
212C
Cowboys
combinatorics
,
dp
,
math
2100
x389
212B
Polycarpus is Looking for Good Substrings
bitmasks
,
hashing
,
implementation
2300
x335
212A
Privatization
flows
,
graphs
3000
x206
209C
Trails and Glades
constructive algorithms
,
dsu
,
graphs
,
greedy
2400
x754
209B
Pixels
constructive algorithms
,
math
2100
x377
209A
Multicolored Marbles
dp
,
math
1600
x2376
208E
Blood Cousins
binary search
,
data structures
,
dfs and similar
,
trees
2100
x6933
208D
Prizes, Prizes, more Prizes
implementation
1200
x7601
208C
Police Station
dp
,
graphs
,
shortest paths
1900
x1878
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