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Rayan Programming Contest 2024 - Selection (Codeforces Round, Div. 1 + Div. 2)
6 days
Register now »
*has extra registration
→ Filter Problems
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
158A
Next Round
*special problem
,
implementation
800
x254012
157B
Trace
geometry
,
sortings
1000
x13256
157A
Game Outcome
brute force
800
x7684
155B
Combination
greedy
,
sortings
1100
x10342
155A
I_love_\%username\%
brute force
800
x76659
152A
Marks
implementation
900
x16883
151B
Phone Numbers
implementation
,
strings
1200
x6391
151A
Soft Drinking
implementation
,
math
800
x74771
149A
Business trip
greedy
,
implementation
,
sortings
900
x40150
148A
Insomnia cure
constructive algorithms
,
implementation
,
math
800
x94011
146A
Lucky Ticket
implementation
800
x15182
145A
Lucky Conversion
greedy
,
implementation
1200
x7175
144A
Arrival of the General
implementation
800
x97520
143B
Help Kingdom of Far Far Away 2
implementation
,
strings
1200
x4997
143A
Help Vasilisa the Wise 2
brute force
,
math
1000
x13961
141A
Amusing Joke
implementation
,
sortings
,
strings
800
x84393
139A
Petr and Book
implementation
1000
x31576
137B
Permutation
greedy
1000
x13762
137A
Postcards and photos
implementation
900
x7219
136B
Ternary Logic
implementation
,
math
1100
x4886
136A
Presents
implementation
800
x119628
134A
Average Numbers
brute force
,
implementation
1200
x4004
133B
Unary
implementation
1200
x8828
133A
HQ9+
implementation
900
x106713
131B
Opposites Attract
implementation
,
math
1200
x7058
131A
cAPS lOCK
implementation
,
strings
1000
x86588
130A
Hexagonal numbers
*special problem
,
implementation
900
x1635
129B
Students and Shoelaces
brute force
,
dfs and similar
,
graphs
,
implementation
1200
x12370
129A
Cookies
implementation
900
x22883
127B
Canvas Frames
implementation
1000
x8902
127A
Wasted Time
geometry
900
x11303
125B
Simple XML
implementation
1000
x2950
124A
The number of positions
math
1000
x38790
122B
Lucky Substring
brute force
,
implementation
1000
x12393
122A
Lucky Division
brute force
,
number theory
1000
x125398
121A
Lucky Sum
implementation
1100
x9281
120C
Winnie-the-Pooh and honey
implementation
,
math
1100
x3682
120B
Quiz League
implementation
1100
x3441
120A
Elevator
brute force
,
implementation
,
math
1000
x4842
119A
Epic Game
implementation
800
x27538
118B
Present from Lena
constructive algorithms
,
implementation
1000
x30267
118A
String Task
implementation
,
strings
1000
x195479
116B
Little Pigs and Wolves
greedy
,
implementation
1100
x13798
116A
Tram
implementation
800
x144497
115A
Party
dfs and similar
,
graphs
,
trees
900
x35010
114A
Cifera
math
1000
x14204
112B
Petya and Square
implementation
,
math
1200
x4192
112A
Petya and Strings
implementation
,
strings
800
x229351
110B
Lucky String
constructive algorithms
,
strings
1100
x10248
110A
Nearly Lucky Number
implementation
800
x158185
109A
Lucky Sum of Digits
brute force
,
implementation
1000
x17765
108A
Palindromic Times
implementation
,
strings
1000
x9404
106B
Choosing Laptop
brute force
,
implementation
1000
x6132
106A
Card Game
implementation
1000
x7639
104A
Blackjack
implementation
800
x15481
103A
Testing Pants for Sadness
greedy
,
implementation
,
math
1100
x6013
102B
Sum of Digits
implementation
1000
x27141
102A
Clothes
brute force
1200
x3030
101A
Homework
greedy
1200
x3870
100A
Carpeting the Room
*special problem
,
implementation
1100
x930
99A
Help Far Away Kingdom
strings
800
x6726
96A
Football
implementation
,
strings
900
x160965
94A
Restoring Password
implementation
,
strings
900
x10639
92A
Chips
implementation
,
math
800
x18966
90B
African Crossword
implementation
,
strings
1100
x5349
90A
Cableway
greedy
,
math
1000
x4712
88A
Chord
brute force
,
implementation
1200
x3837
84A
Toy Army
math
,
number theory
900
x15174
82A
Double Cola
implementation
,
math
1100
x30407
80B
Depression
geometry
,
math
1200
x4450
80A
Panoramix's Prediction
brute force
800
x54551
79A
Bus Game
greedy
1200
x4097
78B
Easter Eggs
constructive algorithms
,
implementation
1200
x13695
78A
Haiku
implementation
,
strings
800
x12944
75A
Life Without Zeros
implementation
1000
x26388
74A
Room Leader
implementation
1000
x5203
72G
Fibonacci army
*special problem
,
dp
1000
x2316
72C
Extraordinarily Nice Numbers
*special problem
,
math
1200
x923
71A
Way Too Long Words
strings
800
x392509
69B
Bets
greedy
,
implementation
1200
x3285
69A
Young Physicist
implementation
,
math
1000
x168166
68A
Irrational problem
implementation
,
number theory
1100
x4959
66B
Petya and Countryside
brute force
,
implementation
1100
x20692
63B
Settlers' Training
implementation
1200
x4842
63A
Sinking Ship
implementation
,
sortings
,
strings
900
x11601
61A
Ultra-Fast Mathematician
implementation
800
x112660
59B
Fortune Telling
implementation
,
number theory
1200
x6923
59A
Word
implementation
,
strings
800
x179400
58A
Chat room
greedy
,
strings
1000
x131570
56A
Bar
implementation
1000
x8725
55A
Flea travel
implementation
,
math
1200
x3473
53C
Little Frog
constructive algorithms
1200
x6514
53A
Autocomplete
implementation
1100
x5116
52A
123-sequence
implementation
900
x8832
50A
Domino piling
greedy
,
math
800
x251556
49A
Sleuth
implementation
800
x13508
48B
Land Lot
brute force
,
implementation
1200
x2700
48A
Rock-paper-scissors
implementation
,
schedules
900
x6262
47B
Coins
implementation
1200
x14130
47A
Triangular numbers
brute force
,
math
800
x15217
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