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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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*has extra registration
→ Filter Problems
Difficulty:
—
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
Standings
Custom test
Problems
#
Name
538D
Weird Chess
brute force
,
constructive algorithms
,
implementation
1800
x2432
538C
Tourist's Notes
binary search
,
brute force
,
greedy
,
implementation
,
math
1600
x5831
538B
Quasi Binary
constructive algorithms
,
dp
,
greedy
,
implementation
1400
x18156
538A
Cutting Banner
brute force
,
implementation
1400
x7146
534C
Polycarpus' Dice
math
1600
x5037
534B
Covered Path
dp
,
greedy
,
math
1400
x10337
533E
Correcting Mistakes
constructive algorithms
,
dp
,
greedy
,
hashing
,
strings
,
two pointers
1800
x2268
533C
Board Game
games
,
greedy
,
implementation
,
math
1700
x2201
530E
Sum and product
*special problem
1700
x308
530D
Set subtraction
*special problem
1600
x452
530C
Diophantine equation
*special problem
1500
x556
530B
String inside out
*special problem
1600
x542
530A
Quadratic equation
*special problem
1500
x675
527D
Clique Problem
data structures
,
dp
,
greedy
,
implementation
,
sortings
1800
x4807
527C
Glass Carving
binary search
,
data structures
,
implementation
1500
x6945
527B
Error Correct System
greedy
1500
x3887
526B
Om Nom and Dark Park
dfs and similar
,
greedy
,
implementation
1400
x4505
525C
Ilya and Sticks
greedy
,
math
,
sortings
1600
x5828
525B
Pasha and String
constructive algorithms
,
greedy
,
math
,
strings
1400
x9444
524B
Фото на память - 2 (round version)
dp
,
greedy
1700
x1464
524A
Возможно, вы знаете этих людей?
implementation
1600
x1415
523D
Statistics of Recompressing Videos
*special problem
,
data structures
,
implementation
1600
x2348
523C
Name Quest
*special problem
,
greedy
1400
x2503
523B
Mean Requests
*special problem
,
implementation
1500
x952
520C
DNA Alignment
math
,
strings
1500
x4171
520B
Two Buttons
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
,
shortest paths
1400
x51587
519D
A and B and Interesting Substrings
data structures
,
dp
,
two pointers
1800
x6400
518D
Ilya and Escalator
combinatorics
,
dp
,
math
,
probabilities
1700
x7056
518C
Anya and Smartphone
constructive algorithms
,
data structures
,
implementation
1600
x6037
518B
Tanya and Postcard
greedy
,
implementation
,
strings
1400
x8002
518A
Vitaly and Strings
constructive algorithms
,
strings
1600
x9233
515C
Drazil and Factorial
greedy
,
math
,
sortings
1400
x26150
514B
Han Solo and Lazer Gun
brute force
,
data structures
,
geometry
,
implementation
,
math
1400
x20929
513G1
Inversions problem
brute force
,
dfs and similar
,
dp
,
meet-in-the-middle
1800
x1793
513B2
Permutations
bitmasks
,
divide and conquer
,
math
1800
x2639
513B1
Permutations
brute force
1400
x3628
510C
Fox And Names
dfs and similar
,
graphs
,
sortings
1600
x16549
510B
Fox And Two Dots
dfs and similar
1500
x14112
508C
Anya and Ghosts
constructive algorithms
,
greedy
1600
x4475
507C
Guess Your Way Out!
implementation
,
math
,
trees
1700
x4384
507B
Amr and Pins
geometry
,
math
1400
x24838
505B
Mr. Kitayuta's Colorful Graph
dfs and similar
,
dp
,
dsu
,
graphs
1400
x13169
501C
Misha and Forest
constructive algorithms
,
data structures
,
greedy
,
sortings
,
trees
1500
x5664
500C
New Year Book Reading
constructive algorithms
,
greedy
,
implementation
,
math
1600
x5829
500B
New Year Permutation
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
,
sortings
1600
x8909
498A
Crazy Town
geometry
1700
x6475
496C
Removing Columns
brute force
,
constructive algorithms
,
implementation
1500
x7763
496B
Secret Combination
brute force
,
constructive algorithms
,
implementation
1500
x5937
495B
Modular Equations
math
,
number theory
1600
x7023
494A
Treasure
greedy
1500
x6261
493D
Vasya and Chess
constructive algorithms
,
games
,
math
1700
x9715
493C
Vasya and Basketball
binary search
,
brute force
,
data structures
,
implementation
,
sortings
,
two pointers
1600
x6841
493B
Vasya and Wrestling
implementation
1400
x13384
492D
Vanya and Computer Game
binary search
,
implementation
,
math
,
sortings
1800
x3161
492C
Vanya and Exams
greedy
,
sortings
1400
x14170
490C
Hacking Cypher
brute force
,
math
,
number theory
,
strings
1700
x9107
490B
Queue
dsu
,
implementation
1500
x6017
489D
Unbearable Controversy of Being
brute force
,
combinatorics
,
dfs and similar
,
graphs
1700
x6708
489C
Given Length and Sum of Digits...
dp
,
greedy
,
implementation
1400
x46604
487A
Fight the Monster
binary search
,
brute force
,
implementation
1800
x3774
486C
Palindrome Transformation
brute force
,
greedy
,
implementation
1700
x11775
485A
Factory
implementation
,
math
,
matrices
1400
x8313
484A
Bits
bitmasks
,
constructive algorithms
1700
x11486
483B
Friends and Presents
binary search
,
math
1800
x4096
482B
Interesting Array
constructive algorithms
,
data structures
,
trees
1800
x6582
479D
Long Jumps
binary search
,
greedy
,
implementation
1700
x4796
479C
Exams
greedy
,
sortings
1400
x29897
479B
Towers
brute force
,
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x7932
478C
Table Decorations
greedy
1800
x18384
476C
Dreamoon and Sums
math
1600
x5751
475B
Strongly Connected City
brute force
,
dfs and similar
,
graphs
,
implementation
1400
x8531
474D
Flowers
dp
1700
x25581
472C
Design Tutorial: Make It Nondeterministic
greedy
1400
x6366
471D
MUH and Cube Walls
string suffix structures
,
strings
1800
x8260
471C
MUH and House of Cards
binary search
,
brute force
,
greedy
,
math
1700
x3571
470B
Hexakosioihexekontahexaphobia
*special problem
1800
x260
470A
Crystal Ball Sequence
*special problem
,
implementation
1400
x677
468A
24 Game
constructive algorithms
,
greedy
,
math
1500
x8008
467C
George and Job
dp
,
implementation
1700
x14788
466C
Number of Ways
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x36556
464A
No to Palindromes!
greedy
,
strings
1700
x5920
460C
Present
binary search
,
data structures
,
greedy
1700
x6253
460B
Little Dima and Equation
brute force
,
implementation
,
math
,
number theory
1500
x12432
459D
Pashmak and Parmida's problem
data structures
,
divide and conquer
,
sortings
1800
x10295
457A
Golden System
math
,
meet-in-the-middle
1700
x1284
455A
Boredom
dp
1500
x59527
453A
Little Pony and Expected Maximum
probabilities
1600
x10689
452B
4-point polyline
brute force
,
constructive algorithms
,
geometry
,
trees
1800
x2002
451C
Predict Outcome of the Game
brute force
,
implementation
,
math
1700
x3389
449A
Jzzhu and Chocolate
greedy
,
math
1700
x3951
448D
Multiplication Table
binary search
,
brute force
1800
x14251
448B
Suffix Structures
implementation
,
strings
1400
x16181
446A
DZY Loves Sequences
dp
,
implementation
,
two pointers
1600
x12607
445B
DZY Loves Chemistry
dfs and similar
,
dsu
,
greedy
1400
x12802
444A
DZY Loves Physics
greedy
,
math
1600
x3426
443B
Kolya and Tandem Repeat
brute force
,
implementation
,
strings
1500
x4067
442B
Andrey and Problem
greedy
,
math
,
probabilities
1800
x5277
442A
Borya and Hanabi
bitmasks
,
brute force
,
implementation
1700
x2154
441C
Valera and Tubes
constructive algorithms
,
dfs and similar
,
implementation
1500
x11263
441B
Valera and Fruits
greedy
,
implementation
1400
x7106
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