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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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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
#
Name
39A
C*++ Calculations
expression parsing
,
greedy
2000
x705
38H
The Great Marathon
dp
2400
x308
38G
Queue
data structures
2300
x709
38F
Smart Boy
dp
,
games
,
strings
2100
x393
38E
Let's Go Rolling!
dp
,
sortings
1800
x2590
38D
Vasya the Architect
implementation
1900
x500
38C
Blinds
brute force
1400
x2186
38B
Chess
brute force
,
implementation
,
math
1200
x3548
38A
Army
implementation
800
x21526
37E
Trial for Chief
graphs
,
greedy
,
shortest paths
2600
x622
37D
Lesson Timetable
combinatorics
,
dp
,
math
2300
x419
37C
Old Berland Language
data structures
,
greedy
,
trees
1900
x1735
37B
Computer Game
greedy
,
implementation
1800
x928
37A
Towers
sortings
1000
x24675
36E
Two Paths
constructive algorithms
,
dsu
,
graphs
,
implementation
2600
x534
36D
New Game with a Chess Piece
games
2300
x710
36C
Bowls
geometry
,
implementation
2200
x340
36B
Fractal
implementation
1600
x1515
36A
Extra-terrestrial Intelligence
implementation
1300
x3027
35E
Parade
data structures
,
sortings
2100
x752
35D
Animals
dp
,
greedy
1700
x3369
35C
Fire Again
brute force
,
dfs and similar
,
shortest paths
1500
x6941
35B
Warehouse
implementation
1700
x1022
35A
Shell Game
implementation
1000
x6851
34E
Collisions
brute force
,
implementation
,
math
2000
x592
34D
Road Map
dfs and similar
,
graphs
1600
x5229
34C
Page Numbers
expression parsing
,
implementation
,
sortings
,
strings
1300
x4260
34B
Sale
greedy
,
sortings
900
x53268
34A
Reconnaissance 2
implementation
800
x30200
33E
Helper
2600
x131
33D
Knights
geometry
,
graphs
,
shortest paths
,
sortings
2000
x1216
33C
Wonderful Randomized Sum
greedy
1800
x3028
33B
String Problem
shortest paths
1800
x4610
33A
What is for dinner?
greedy
,
implementation
1200
x4125
32E
Hide-and-Seek
geometry
,
implementation
2400
x337
32D
Constellation
implementation
1600
x1289
32C
Flea
math
1700
x2177
32B
Borze
expression parsing
,
implementation
800
x64828
32A
Reconnaissance
brute force
800
x12657
31E
TV Game
dp
2400
x1105
31D
Chocolate
dfs and similar
,
implementation
2000
x1048
31C
Schedule
implementation
1700
x1829
31B
Sysadmin Bob
greedy
,
implementation
,
strings
1500
x4350
31A
Worms Evolution
implementation
1200
x10410
30E
Tricky and Clever Password
binary search
,
constructive algorithms
,
data structures
,
greedy
,
hashing
,
strings
2800
x744
30D
King's Problem?
geometry
,
greedy
2600
x453
30C
Shooting Gallery
dp
,
probabilities
1800
x1976
30B
Codeforces World Finals
implementation
1700
x1206
30A
Accounting
brute force
,
math
1400
x3486
29E
Quarrel
graphs
,
shortest paths
2400
x928
29D
Ant on the Tree
constructive algorithms
,
dfs and similar
,
trees
2000
x2482
29C
Mail Stamps
data structures
,
dfs and similar
,
graphs
,
implementation
1700
x5012
29B
Traffic Lights
implementation
1500
x2995
29A
Spit Problem
brute force
1000
x7132
28E
DravDe saves the world
geometry
,
math
2800
x91
28D
Don't fear, DravDe is kind
binary search
,
data structures
,
dp
,
hashing
2400
x617
28C
Bath Queue
combinatorics
,
dp
,
probabilities
2200
x1058
28B
pSort
dfs and similar
,
dsu
,
graphs
1600
x4725
28A
Bender Problem
implementation
1600
x801
27E
Number With The Given Amount Of Divisors
brute force
,
dp
,
number theory
2000
x4256
27D
Ring Road 2
2-sat
,
dfs and similar
,
dsu
,
graphs
2200
x2551
27C
Unordered Subsequence
constructive algorithms
,
greedy
1900
x2815
27B
Tournament
bitmasks
,
brute force
,
dfs and similar
,
greedy
1300
x5386
27A
Next Test
implementation
,
sortings
1200
x20495
26E
Multithreading
constructive algorithms
2400
x376
26D
Tickets
combinatorics
,
math
,
probabilities
2400
x801
26C
Parquet
combinatorics
,
constructive algorithms
,
greedy
,
implementation
2000
x863
26B
Regular Bracket Sequence
greedy
1400
x19782
26A
Almost Prime
number theory
900
x32003
25E
Test
hashing
,
strings
2200
x2517
25D
Roads not only in Berland
dsu
,
graphs
,
trees
1900
x11580
25C
Roads in Berland
graphs
,
shortest paths
1900
x6400
25B
Phone numbers
implementation
1100
x9759
25A
IQ test
brute force
1300
x87391
24E
Berland collider
binary search
2300
x902
24D
Broken robot
dp
,
math
,
probabilities
2400
x1994
24C
Sequence of points
geometry
,
implementation
,
math
1800
x1266
24B
F1 Champions
implementation
1500
x1790
24A
Ring road
graphs
1400
x5246
23E
Tree
dp
2500
x620
23D
Tetragon
geometry
,
math
2600
x337
23C
Oranges and Apples
constructive algorithms
,
sortings
2500
x1430
23B
Party
constructive algorithms
,
graphs
,
math
1600
x3378
23A
You're Given a String...
brute force
,
greedy
1200
x5374
22E
Scheme
dfs and similar
,
graphs
,
trees
2300
x1672
22D
Segments
greedy
,
sortings
1900
x2758
22C
System Administrator
graphs
1700
x3154
22B
Bargaining Table
brute force
,
dp
1500
x4250
22A
Second Order Statistics
brute force
800
x22599
21D
Traveling Graph
bitmasks
,
graph matchings
,
graphs
2400
x910
21C
Stripe 2
binary search
,
dp
,
sortings
2000
x2158
21B
Intersection
implementation
,
math
2000
x1360
21A
Jabber ID
implementation
,
strings
1900
x1886
20C
Dijkstra?
graphs
,
shortest paths
1900
x33437
20B
Equation
math
2000
x3928
20A
BerOS file system
implementation
1700
x6274
19E
Fairy
dfs and similar
,
divide and conquer
,
dsu
2900
x1895
19D
Points
data structures
2800
x2467
19C
Deletion of Repeats
greedy
,
hashing
,
string suffix structures
2200
x1109
19B
Checkout Assistant
dp
1900
x4867
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