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Rayan
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Rayan Programming Contest 2024 - Selection (Codeforces Round, Div. 1 + Div. 2)
6 days
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*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
435C
Cardiogram
implementation
1600
x2582
435B
Pasha Maximizes
greedy
1400
x7050
435A
Queue on Bus Stop
implementation
1000
x10194
434E
Furukawa Nagisa's Tree
binary search
,
divide and conquer
,
sortings
,
trees
3000
x273
434D
Nanami's Power Plant
flows
2900
x468
433E
Tachibana Kanade's Tofu
dp
2500
x483
433D
Nanami's Digital Board
dsu
,
implementation
2000
x1245
433C
Ryouko's Memory Note
implementation
,
math
,
sortings
1800
x2489
433B
Kuriyama Mirai's Stones
dp
,
implementation
,
sortings
1200
x40419
433A
Kitahara Haruki's Gift
brute force
,
implementation
1100
x16468
432E
Square Tiling
constructive algorithms
,
greedy
2300
x701
432D
Prefixes and Suffixes
dp
,
string suffix structures
,
strings
,
two pointers
2000
x9291
432C
Prime Swaps
greedy
,
sortings
1800
x2524
432B
Football Kit
brute force
,
greedy
,
implementation
1200
x11725
432A
Choosing Teams
greedy
,
implementation
,
sortings
800
x60698
431E
Chemistry Experiment
binary search
,
data structures
,
ternary search
2200
x1027
431D
Random Task
binary search
,
bitmasks
,
combinatorics
,
dp
,
math
2100
x2326
431C
k-Tree
dp
,
implementation
,
trees
1600
x25855
431B
Shower Line
brute force
,
implementation
1200
x10865
431A
Black Square
implementation
800
x55685
430B
Balls Game
brute force
,
two pointers
1400
x3735
430A
Points and Segments (easy)
constructive algorithms
,
sortings
1600
x2282
429E
Points and Segments
graphs
3000
x894
429D
Tricky Function
data structures
,
divide and conquer
,
geometry
2200
x2953
429C
Guess the Tree
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
trees
2300
x953
429B
Working out
dp
1600
x8775
429A
Xor-tree
dfs and similar
,
trees
1300
x10435
427E
Police Patrol
greedy
,
implementation
,
math
,
ternary search
2000
x1435
427D
Match & Catch
dp
,
string suffix structures
,
strings
2200
x2220
427C
Checkposts
dfs and similar
,
graphs
,
two pointers
1700
x14165
427B
Prison Transfer
data structures
,
implementation
1100
x14119
427A
Police Recruits
implementation
800
x79456
426B
Sereja and Mirroring
implementation
1300
x3814
426A
Sereja and Mugs
implementation
800
x9255
425E
Sereja and Sets
dp
2500
x682
425D
Sereja and Squares
binary search
,
data structures
,
hashing
2300
x1463
425C
Sereja and Two Sequences
data structures
,
dp
2300
x904
425B
Sereja and Table
bitmasks
,
greedy
2200
x1314
425A
Sereja and Swaps
brute force
,
sortings
1500
x3914
424E
Colored Jenga
dfs and similar
,
dp
,
probabilities
2500
x134
424D
Biathlon Track
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
2300
x568
424C
Magic Formulas
math
1600
x5444
424B
Megacity
binary search
,
greedy
,
implementation
,
sortings
1200
x7769
424A
Squats
implementation
900
x8514
421D
Bug in Code
binary search
,
data structures
,
sortings
1900
x541
421A
Pasha and Hamsters
constructive algorithms
,
implementation
800
x6126
420E
Playing the ball
geometry
2600
x219
420D
Cup Trick
data structures
2200
x846
420C
Bug in Code
data structures
,
graphs
,
implementation
,
two pointers
1900
x1268
420B
Online Meeting
implementation
1800
x1045
420A
Start Up
implementation
1000
x6254
418E
Tricky Password
data structures
3100
x318
418D
Big Problems for Organizers
data structures
,
graphs
,
trees
2800
x483
417E
Square Table
constructive algorithms
,
math
,
probabilities
2400
x842
417D
Cunning Gena
bitmasks
,
dp
,
greedy
,
sortings
1900
x2532
417C
Football
constructive algorithms
,
graphs
,
implementation
1400
x4678
417B
Crash
implementation
1400
x1792
417A
Elimination
dp
,
implementation
,
math
1500
x3028
416E
President's Path
dp
,
graphs
,
shortest paths
2500
x1510
416D
Population Size
greedy
,
implementation
,
math
2400
x951
416C
Booking System
binary search
,
dp
,
greedy
,
implementation
1600
x8059
416B
Art Union
brute force
,
dp
,
implementation
1300
x8771
416A
Guess a number!
greedy
,
implementation
,
two pointers
1400
x8993
415B
Mashmokh and Tokens
binary search
,
greedy
,
implementation
,
math
1500
x6324
415A
Mashmokh and Lights
implementation
900
x9027
414E
Mashmokh's Designed Problem
data structures
3200
x200
414D
Mashmokh and Water Tanks
binary search
,
data structures
,
greedy
,
trees
,
two pointers
2300
x687
414C
Mashmokh and Reverse Operation
combinatorics
,
divide and conquer
2100
x2226
414B
Mashmokh and ACM
combinatorics
,
dp
,
number theory
1400
x22622
414A
Mashmokh and Numbers
constructive algorithms
,
number theory
1500
x9852
413E
Maze 2D
data structures
,
divide and conquer
2200
x744
413D
2048
bitmasks
,
dp
2000
x822
413C
Jeopardy!
greedy
,
math
1400
x2388
413B
Spyke Chatting
implementation
1300
x1715
413A
Data Recovery
implementation
1200
x2659
412E
E-mail Addresses
implementation
1900
x847
412D
Giving Awards
dfs and similar
2000
x1970
412C
Pattern
implementation
,
strings
1200
x3941
412B
Network Configuration
greedy
,
sortings
900
x5447
412A
Poster
greedy
,
implementation
900
x4475
411C
Kicker
implementation
1700
x1229
411B
Multi-core Processor
implementation
1600
x1280
411A
Password Check
*special problem
,
implementation
800
x7282
409I
Feed the Golorp
*special problem
2400
x127
409H
A + B Strikes Back
*special problem
,
brute force
,
constructive algorithms
,
dsu
,
implementation
1500
x8975
409G
On a plane
*special problem
,
geometry
2200
x521
409F
000001
*special problem
1900
x2093
409E
Dome
*special problem
1800
x579
409D
Big Data
*special problem
1700
x1716
409C
Magnum Opus
*special problem
1700
x1983
409B
Mysterious Language
*special problem
1700
x1359
409A
The Great Game
*special problem
1700
x2469
408B
Garland
implementation
1200
x9379
408A
Line to Cashier
implementation
900
x11295
407E
k-d-sequence
data structures
3100
x796
407D
Largest Submatrix 3
dp
,
hashing
2700
x679
407C
Curious Array
brute force
,
combinatorics
,
implementation
,
math
2500
x1012
407B
Long Path
dp
,
implementation
1600
x6612
407A
Triangle
brute force
,
geometry
,
implementation
,
math
1600
x4914
406E
Hamming Triples
implementation
,
math
,
two pointers
2800
x248
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