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Rayan Programming Contest 2024 - Selection (Codeforces Round, Div. 1 + Div. 2)
4 days
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Difficulty:
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math
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
#
Name
622F
The Sum of the k-th Powers
math
2600
x3916
622A
Infinite Sequence
implementation
,
math
1000
x9420
621D
Rat Kwesh and Cheese
brute force
,
constructive algorithms
,
math
2400
x998
621C
Wet Shark and Flowers
combinatorics
,
math
,
number theory
,
probabilities
1700
x5585
620A
Professor GukiZ's Robot
implementation
,
math
800
x13296
618G
Combining Slimes
dp
,
math
,
matrices
,
probabilities
3300
x241
617A
Elephant
math
800
x190312
616E
Sum of Remainders
implementation
,
math
,
number theory
2200
x2984
615E
Hexagons
binary search
,
implementation
,
math
2100
x987
615D
Multipliers
math
,
number theory
2000
x3944
614B
Gena's Code
implementation
,
math
1400
x6929
613C
Necklace
constructive algorithms
,
math
2500
x1015
612E
Square Root of Permutation
combinatorics
,
constructive algorithms
,
dfs and similar
,
graphs
,
math
2200
x1718
612C
Replace To Make Regular Bracket Sequence
data structures
,
expression parsing
,
math
1400
x8198
612B
HDD is Outdated Technology
implementation
,
math
1200
x7127
610A
Pasha and Stick
combinatorics
,
math
1000
x23526
609C
Load Balancing
implementation
,
math
1500
x6668
608A
Saitama Destroys Hotel
implementation
,
math
1000
x9375
603E
Pastoral Oddities
data structures
,
divide and conquer
,
dsu
,
math
,
trees
3000
x1314
603D
Ruminations on Ruminants
geometry
,
math
2900
x340
603C
Lieges of Legendre
games
,
math
2200
x1894
603B
Moodular Arithmetic
combinatorics
,
dfs and similar
,
dsu
,
math
,
number theory
1800
x2589
603A
Alternative Thinking
dp
,
greedy
,
math
1600
x7698
601C
Kleofáš and the n-thlon
dp
,
math
,
probabilities
2300
x1335
601B
Lipshitz Sequence
data structures
,
math
2100
x2333
599D
Spongebob and Squares
brute force
,
math
1900
x2591
598A
Tricky Sum
math
900
x26896
597A
Divisibility
math
1600
x4545
596D
Wilbur and Trees
dp
,
math
,
probabilities
,
sortings
2300
x685
595B
Pasha and Phone
binary search
,
math
1600
x2929
593D
Happy Tree Party
data structures
,
dfs and similar
,
graphs
,
math
,
trees
2400
x1266
593C
Beautiful Function
constructive algorithms
,
math
2200
x284
592C
The Big Race
math
1800
x3070
592B
The Monster and the Squirrel
math
1100
x8639
591A
Wizards' Duel
implementation
,
math
900
x14594
590B
Chip 'n Dale Rescue Rangers
binary search
,
geometry
,
math
2100
x1917
588B
Duff in Love
math
1300
x14154
585E
Present for Vitalik the Philatelist
combinatorics
,
math
,
number theory
2900
x1114
584E
Anton and Ira
constructive algorithms
,
greedy
,
math
2300
x1430
584D
Dima and Lisa
brute force
,
math
,
number theory
1800
x9476
584A
Olesya and Rodion
math
1000
x45703
582D
Number of Binominal Coefficients
dp
,
math
,
number theory
3300
x658
581D
Three Logos
bitmasks
,
brute force
,
constructive algorithms
,
geometry
,
implementation
,
math
1700
x3777
581C
Developing Skills
implementation
,
math
,
sortings
1400
x7338
581B
Luxurious Houses
implementation
,
math
1100
x13097
581A
Vasya the Hipster
implementation
,
math
800
x72102
578A
A Problem about Polyline
geometry
,
math
1700
x4773
576A
Vasya and Petya's Game
math
,
number theory
1500
x14052
575H
Bots
combinatorics
,
dp
,
math
,
number theory
1800
x1692
575A
Fibonotci
data structures
,
math
,
matrices
2700
x808
573B
Bear and Blocks
binary search
,
data structures
,
dp
,
math
1600
x5962
573A
Bear and Poker
implementation
,
math
,
number theory
1300
x16738
571E
Geometric Progressions
math
3200
x270
571A
Lengthening Sticks
combinatorics
,
implementation
,
math
2100
x2330
570B
Simple Game
constructive algorithms
,
games
,
greedy
,
implementation
,
math
1300
x16206
569B
Inventory
greedy
,
math
1200
x7113
569A
Music
implementation
,
math
1500
x4819
568D
Sign Posts
brute force
,
geometry
,
math
2800
x308
568B
Symmetric and Transitive
combinatorics
,
dp
,
math
1900
x2252
568A
Primes or Palindromes?
brute force
,
implementation
,
math
,
number theory
1600
x5119
566F
Clique in the Divisibility Graph
dp
,
math
,
number theory
1500
x3658
559C
Gerald and Giant Chess
combinatorics
,
dp
,
math
,
number theory
2200
x6608
559A
Gerald's Hexagon
brute force
,
geometry
,
math
1600
x10471
558C
Amr and Chemistry
brute force
,
graphs
,
greedy
,
math
,
shortest paths
1900
x3996
557D
Vitaly and Cycle
combinatorics
,
dfs and similar
,
graphs
,
math
2000
x2213
557C
Arthur and Table
brute force
,
data structures
,
dp
,
greedy
,
math
,
sortings
1900
x4031
557B
Pasha and Tea
constructive algorithms
,
implementation
,
math
,
sortings
1500
x7204
557A
Ilya and Diplomas
greedy
,
implementation
,
math
1100
x8273
555D
Case of a Top Secret
binary search
,
implementation
,
math
2500
x874
554A
Kyoya and Photobooks
brute force
,
math
,
strings
900
x13295
553E
Kyoya and Train
dp
,
fft
,
graphs
,
math
,
probabilities
3200
x557
553B
Kyoya and Permutation
binary search
,
combinatorics
,
constructive algorithms
,
greedy
,
implementation
,
math
1900
x2120
553A
Kyoya and Colored Balls
combinatorics
,
dp
,
math
1500
x8718
552D
Vanya and Triangles
brute force
,
combinatorics
,
data structures
,
geometry
,
math
,
sortings
1900
x4498
552C
Vanya and Scales
brute force
,
dp
,
greedy
,
math
,
meet-in-the-middle
,
number theory
1900
x5496
552B
Vanya and Books
implementation
,
math
1200
x15443
552A
Vanya and Table
implementation
,
math
1000
x9606
551D
GukiZ and Binary Operations
combinatorics
,
implementation
,
math
,
matrices
,
number theory
2100
x1967
550E
Brackets in Implications
constructive algorithms
,
greedy
,
implementation
,
math
2200
x1397
550C
Divisibility by Eight
brute force
,
dp
,
math
1500
x28909
549H
Degenerate Matrix
binary search
,
math
2100
x1997
549E
Sasha Circle
geometry
,
math
2700
x156
547C
Mike and Foam
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
2300
x2908
547A
Mike and Frog
brute force
,
greedy
,
implementation
,
math
2200
x2596
546E
Soldier and Traveling
flows
,
graphs
,
math
2100
x3708
546D
Soldier and Number Game
constructive algorithms
,
dp
,
math
,
number theory
1700
x11985
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x186117
542D
Superhero's Job
dfs and similar
,
dp
,
hashing
,
math
,
number theory
2600
x514
542C
Idempotent functions
constructive algorithms
,
graphs
,
math
2000
x1135
538G
Berserk Robot
constructive algorithms
,
math
,
sortings
3100
x470
538F
A Heap of Heaps
brute force
,
data structures
,
math
,
sortings
2200
x1739
538E
Demiurges Play Again
dfs and similar
,
dp
,
math
,
trees
2200
x1548
538C
Tourist's Notes
binary search
,
brute force
,
greedy
,
implementation
,
math
1600
x5831
535E
Tavas and Pashmaks
geometry
,
math
2600
x806
535C
Tavas and Karafs
binary search
,
greedy
,
math
1900
x3801
534C
Polycarpus' Dice
math
1600
x5037
534B
Covered Path
dp
,
greedy
,
math
1400
x10339
534A
Exam
constructive algorithms
,
implementation
,
math
1100
x12327
533C
Board Game
games
,
greedy
,
implementation
,
math
1700
x2201
527A
Playing with Paper
implementation
,
math
1100
x14502
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