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Rayan Programming Contest 2024 - Selection (Codeforces Round, Div. 1 + Div. 2)
4 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
1993D
Med-imize
binary search
,
dp
,
greedy
2200
x3767
1993C
Light Switches
implementation
,
math
1400
x13659
1993B
Parity and Sum
constructive algorithms
,
greedy
1100
x22813
1993A
Question Marks
greedy
,
implementation
800
x29474
1992G
Ultra-Meow
combinatorics
,
dp
,
math
2000
x3155
1992F
Valuable Cards
brute force
,
dp
,
greedy
,
number theory
,
two pointers
1900
x5778
1992E
Novice's Mistake
brute force
,
constructive algorithms
,
implementation
,
math
,
strings
1700
x9185
1992D
Test of Love
dp
,
greedy
,
implementation
1200
x20479
1992C
Gorilla and Permutation
constructive algorithms
,
math
900
x29191
1992B
Angry Monk
greedy
,
math
,
sortings
800
x34351
1992A
Only Pluses
brute force
,
constructive algorithms
,
greedy
,
math
,
sortings
800
x41463
1991I
Grid Game
constructive algorithms
,
games
,
graph matchings
,
greedy
,
interactive
3500
x130
1991H
Prime Split Game
bitmasks
,
dp
,
fft
,
games
,
math
,
number theory
3300
x505
1991G
Grid Reset
constructive algorithms
,
greedy
,
implementation
2700
x612
1991F
Triangle Formation
brute force
,
greedy
,
implementation
,
math
,
sortings
2200
x2328
1991E
Coloring Game
constructive algorithms
,
dfs and similar
,
games
,
graphs
,
greedy
,
interactive
1900
x4240
1991D
Prime XOR Coloring
bitmasks
,
constructive algorithms
,
graphs
,
greedy
,
math
,
number theory
1900
x6690
1991C
Absolute Zero
constructive algorithms
,
greedy
,
math
1300
x14648
1991B
AND Reconstruction
bitmasks
,
constructive algorithms
,
greedy
1100
x16417
1991A
Maximize the Last Element
greedy
,
implementation
800
x21899
1990F
Polygonal Segments
brute force
,
data structures
,
divide and conquer
,
dp
,
greedy
,
two pointers
2800
x298
1990E2
Catch the Mole(Hard Version)
binary search
,
data structures
,
dfs and similar
,
divide and conquer
,
interactive
,
trees
2600
x873
1990E1
Catch the Mole(Easy Version)
binary search
,
data structures
,
dfs and similar
,
interactive
,
trees
2500
x932
1990D
Grid Puzzle
bitmasks
,
brute force
,
dp
,
greedy
,
implementation
1800
x6341
1990C
Mad MAD Sum
brute force
,
greedy
,
math
1500
x11678
1990B
Array Craft
constructive algorithms
,
greedy
1200
x16574
1990A
Submission Bait
brute force
,
games
,
greedy
,
sortings
900
x22774
1989F
Simultaneous Coloring
dfs and similar
,
divide and conquer
,
graphs
3000
x456
1989E
Distance to Different
combinatorics
,
dp
,
math
2300
x1996
1989D
Smithing Skill
brute force
,
data structures
,
dp
,
greedy
,
math
,
sortings
,
two pointers
1900
x5999
1989C
Two Movies
greedy
,
math
1400
x18578
1989B
Substring and Subsequence
brute force
,
greedy
,
strings
1200
x20236
1989A
Catch the Coin
implementation
800
x26434
1988F
Heartbeat
combinatorics
,
dp
,
fft
,
math
3000
x214
1988E
Range Minimum Sum
binary search
,
brute force
,
data structures
,
divide and conquer
,
implementation
2300
x1435
1988D
The Omnipotent Monster Killer
brute force
,
dfs and similar
,
dp
,
trees
2000
x4957
1988C
Increasing Sequence with Fixed OR
bitmasks
,
constructive algorithms
,
greedy
1300
x16653
1988B
Make Majority
greedy
,
implementation
900
x22853
1988A
Split the Multiset
brute force
,
greedy
,
implementation
,
math
900
x23314
1987H
Fumo Temple
interactive
3500
x107
1987G2
Spinning Round (Hard Version)
divide and conquer
,
dp
,
trees
3500
x173
1987G1
Spinning Round (Easy Version)
divide and conquer
,
dp
,
trees
2900
x275
1987F2
Interesting Problem (Hard Version)
dp
2600
x1036
1987F1
Interesting Problem (Easy Version)
dp
2500
x1135
1987E
Wonderful Tree!
brute force
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
trees
2000
x3429
1987D
World is Mine
dp
,
games
1800
x7194
1987C
Basil's Garden
dp
,
greedy
1200
x17435
1987B
K-Sort
greedy
1000
x20543
1987A
Upload More RAM
greedy
,
math
800
x25426
1986G2
Permutation Problem (Hard Version)
brute force
,
data structures
,
hashing
,
math
,
number theory
2500
x1094
1986G1
Permutation Problem (Simple Version)
binary search
,
brute force
,
combinatorics
,
data structures
,
math
,
number theory
2200
x1502
1986F
Non-academic Problem
dfs and similar
,
graphs
,
trees
1900
x4594
1986E
Beautiful Array
greedy
,
math
,
number theory
,
sortings
1700
x8875
1986D
Mathematical Problem
brute force
,
dp
,
greedy
,
implementation
,
math
,
two pointers
1400
x15259
1986C
Update Queries
data structures
,
greedy
,
sortings
1100
x22922
1986B
Matrix Stabilization
brute force
,
data structures
,
greedy
,
sortings
1000
x26706
1986A
X Axis
brute force
,
geometry
,
math
,
sortings
800
x40701
1985H2
Maximize the Largest Component (Hard Version)
data structures
,
dfs and similar
,
dp
,
dsu
,
implementation
2200
x1543
1985H1
Maximize the Largest Component (Easy Version)
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
implementation
1700
x5638
1985G
D-Function
combinatorics
,
math
,
number theory
1600
x9479
1985F
Final Boss
binary search
,
data structures
1500
x15434
1985E
Secret Box
brute force
,
combinatorics
,
math
1200
x20005
1985D
Manhattan Circle
implementation
,
math
900
x34756
1985C
Good Prefixes
greedy
1000
x32588
1985B
Maximum Multiple Sum
brute force
,
math
,
number theory
800
x46610
1985A
Creating Words
implementation
,
strings
800
x54315
1984H
Tower Capturing
combinatorics
,
dp
,
geometry
3300
x169
1984G
Magic Trick II
constructive algorithms
,
implementation
,
sortings
3200
x260
1984F
Reconstruction
brute force
,
dp
,
math
2500
x943
1984E
Shuffle
dp
,
greedy
,
trees
2400
x1412
1984D
''a'' String Problem
brute force
,
hashing
,
implementation
,
math
,
string suffix structures
,
strings
2000
x3303
1984C2
Magnitude (Hard Version)
combinatorics
,
dp
,
greedy
,
math
1700
x7451
1984C1
Magnitude (Easy Version)
dp
,
greedy
,
math
1300
x16710
1984B
Large Addition
implementation
,
math
1100
x18369
1984A
Strange Splitting
constructive algorithms
800
x21206
1983G
Your Loss
bitmasks
,
brute force
,
dp
,
trees
3000
x212
1983F
array-value
binary search
,
bitmasks
,
data structures
,
greedy
,
two pointers
2500
x1213
1983E
I Love Balls
combinatorics
,
math
,
probabilities
2300
x2022
1983D
Swap Dilemma
constructive algorithms
,
data structures
,
divide and conquer
,
greedy
,
math
,
sortings
1700
x8259
1983C
Have Your Cake and Eat It Too
binary search
,
brute force
,
greedy
,
implementation
1400
x12621
1983B
Corner Twist
constructive algorithms
,
greedy
,
implementation
,
math
1200
x16167
1983A
Array Divisibility
constructive algorithms
,
math
800
x25737
1982F
Sorting Problem Again
binary search
,
data structures
,
sortings
2600
x964
1982E
Number of k-good subarrays
bitmasks
,
brute force
,
combinatorics
,
divide and conquer
,
dp
,
math
,
meet-in-the-middle
2300
x1606
1982D
Beauty of the mountains
brute force
,
data structures
,
implementation
,
math
,
number theory
1700
x7197
1982C
Boring Day
binary search
,
data structures
,
dp
,
greedy
,
two pointers
1200
x17677
1982B
Collatz Conjecture
brute force
,
implementation
,
math
,
number theory
1200
x17018
1982A
Soccer
greedy
,
implementation
,
math
,
sortings
800
x25213
1981F
Turtle and Paths on a Tree
data structures
,
dp
,
trees
3000
x274
1981E
Turtle and Intersected Segments
data structures
,
dsu
,
graphs
,
greedy
2600
x926
1981D
Turtle and Multiplication
constructive algorithms
,
dfs and similar
,
graphs
,
number theory
2400
x1684
1981C
Turtle and an Incomplete Sequence
bitmasks
,
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
1800
x5376
1981B
Turtle and an Infinite Sequence
bitmasks
,
math
1300
x13787
1981A
Turtle and Piggy Are Playing a Game
brute force
,
greedy
,
math
800
x22377
1980G
Yasya and the Mysterious Tree
bitmasks
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
strings
,
trees
2300
x1260
1980F2
Field Division (hard version)
math
,
sortings
2400
x1011
1980F1
Field Division (easy version)
data structures
,
math
,
sortings
1900
x3766
1980E
Permutation of Rows and Columns
constructive algorithms
,
data structures
,
greedy
,
hashing
,
implementation
,
math
,
matrices
,
sortings
1600
x10583
1980D
GCD-sequence
greedy
,
implementation
,
math
,
number theory
1400
x14372
1980C
Sofia and the Lost Operations
constructive algorithms
,
greedy
1300
x18685
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