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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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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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Status
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Custom test
Problems
#
Name
1242D
Number Discovery
math
3400
x199
1242C
Sum Balance
bitmasks
,
dfs and similar
,
dp
,
graphs
2400
x1685
1242B
0-1 MST
dfs and similar
,
dsu
,
graphs
,
sortings
1900
x7618
1242A
Tile Painting
constructive algorithms
,
math
,
number theory
1500
x12672
1240F
Football
graphs
3100
x256
1239F
Swiper, no swiping!
graphs
,
implementation
3400
x281
1239E
Turtle
dp
,
implementation
3100
x1013
1239D
Catowice City
2-sat
,
dfs and similar
,
graph matchings
,
graphs
2400
x2062
1239C
Queue in the Train
data structures
,
greedy
,
implementation
2300
x1559
1239B
The World Is Just a Programming Task (Hard Version)
implementation
2500
x1054
1239A
Ivan the Fool and the Probability Theory
combinatorics
,
dp
,
math
1700
x7380
1238G
Adilbek and the Watering System
data structures
,
greedy
,
sortings
2700
x410
1238F
The Maximum Subtree
dfs and similar
,
dp
,
graphs
,
trees
2200
x1895
1238E
Keyboard Purchase
bitmasks
,
dp
2200
x3072
1238D
AB-string
binary search
,
combinatorics
,
dp
,
strings
1900
x6069
1238C
Standard Free2play
dp
,
greedy
,
math
1600
x7451
1238B
Kill `Em All
greedy
,
sortings
1300
x13691
1238A
Prime Subtraction
math
,
number theory
900
x24567
1237H
Balanced Reversals
constructive algorithms
3300
x373
1237G
Balanced Distribution
data structures
,
dp
,
greedy
3500
x123
1237F
Balanced Domino Placements
combinatorics
,
dp
2600
x904
1237E
Balanced Binary Search Trees
dp
,
math
2400
x1339
1237D
Balanced Playlist
binary search
,
data structures
,
implementation
2000
x4252
1237C2
Balanced Removals (Harder)
binary search
,
constructive algorithms
,
divide and conquer
,
greedy
,
implementation
,
sortings
1900
x4356
1237C1
Balanced Removals (Easier)
constructive algorithms
,
geometry
,
greedy
1700
x6115
1237B
Balanced Tunnel
data structures
,
sortings
,
two pointers
1300
x16328
1237A
Balanced Rating Changes
implementation
,
math
1000
x20079
1236F
Alice and the Cactus
dfs and similar
,
graphs
,
math
,
probabilities
3000
x177
1236E
Alice and the Unfair Game
binary search
,
data structures
,
dp
,
dsu
2500
x671
1236D
Alice and the Doll
brute force
,
data structures
,
greedy
,
implementation
2300
x1679
1236C
Labs
constructive algorithms
,
greedy
,
implementation
1300
x10180
1236B
Alice and the List of Presents
combinatorics
,
math
1500
x11148
1236A
Stones
brute force
,
greedy
,
math
800
x16501
1234F
Yet Another Substring Reverse
bitmasks
,
dp
2200
x2621
1234E
Special Permutations
math
2000
x2798
1234D
Distinct Characters Queries
data structures
1600
x15367
1234C
Pipes
dp
,
implementation
1500
x12677
1234B2
Social Network (hard version)
data structures
,
implementation
1300
x16989
1234B1
Social Network (easy version)
implementation
1000
x18835
1234A
Equalize Prices Again
math
800
x27983
1231E
Middle-Out
constructive algorithms
,
greedy
,
strings
2200
x842
1231C
Increasing Matrix
greedy
1100
x3879
1230B
Ania and Minimizing
greedy
,
implementation
1000
x18781
1230A
Dawid and Bags of Candies
brute force
,
implementation
800
x21725
1228F
One Node is Gone
constructive algorithms
,
implementation
,
trees
2500
x439
1228E
Another Filling the Grid
combinatorics
,
dp
,
math
2300
x2792
1228D
Complete Tripartite
brute force
,
constructive algorithms
,
graphs
,
hashing
,
implementation
1900
x5232
1228C
Primes and Multiplication
math
,
number theory
1700
x9082
1228B
Filling the Grid
implementation
,
math
1400
x11564
1228A
Distinct Digits
brute force
,
implementation
800
x21876
1227G
Not Same
constructive algorithms
2600
x1061
1227F2
Wrong Answer on test 233 (Hard Version)
combinatorics
,
math
2400
x1535
1227F1
Wrong Answer on test 233 (Easy Version)
dp
2200
x1836
1227E
Arson In Berland Forest
binary search
,
graphs
,
graphs
,
shortest paths
2200
x1501
1227D2
Optimal Subsequences (Hard Version)
data structures
,
greedy
1800
x4411
1227D1
Optimal Subsequences (Easy Version)
data structures
,
greedy
1600
x6453
1227C
Messy
constructive algorithms
1700
x5538
1227B
Box
constructive algorithms
1200
x9703
1227A
Math Problem
math
1100
x9840
1225G
To Make 1
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
number theory
3100
x564
1225F
Tree Factory
constructive algorithms
,
greedy
,
trees
2500
x889
1225E
Rock Is Push
binary search
,
dp
2200
x1905
1225D
Power Products
hashing
,
math
,
number theory
1800
x8173
1225C
p-binary
bitmasks
,
brute force
,
math
1600
x9040
1225B2
TV Subscriptions (Hard Version)
implementation
,
two pointers
1300
x10761
1225B1
TV Subscriptions (Easy Version)
implementation
1000
x11946
1225A
Forgetting Things
math
900
x15865
1223G
Wooden Raft
binary search
,
math
,
number theory
3200
x250
1223F
Stack Exterminable Arrays
data structures
,
divide and conquer
,
dp
,
hashing
2600
x2085
1223E
Paint the Tree
dp
,
sortings
,
trees
2100
x2631
1223D
Sequence Sorting
dp
,
greedy
,
two pointers
2000
x4079
1223C
Save the Nature
binary search
,
greedy
1600
x8395
1223B
Strings Equalization
strings
1000
x14987
1223A
CME
math
800
x21662
1221G
Graph And Numbers
bitmasks
,
brute force
,
combinatorics
,
dp
,
meet-in-the-middle
2900
x766
1221F
Choose a Square
binary search
,
data structures
,
sortings
2400
x1061
1221E
Game With String
games
2500
x1097
1221D
Make The Fence Great Again
dp
1800
x9200
1221C
Perfect Team
binary search
,
math
1200
x21328
1221B
Knights
constructive algorithms
,
greedy
1100
x11988
1221A
2048 Game
brute force
,
greedy
,
math
1000
x17008
1220G
Geolocation
geometry
3400
x54
1220F
Gardener Alex
binary search
,
data structures
2700
x720
1220E
Tourism
dfs and similar
,
dp
,
dsu
,
graphs
,
greedy
,
trees
2200
x2799
1220D
Alex and Julian
bitmasks
,
math
,
number theory
1900
x3921
1220C
Substring Game in the Lesson
games
,
greedy
,
strings
1300
x10294
1220B
Multiplication Table
math
,
number theory
1300
x11662
1220A
Cards
implementation
,
sortings
,
strings
800
x30012
1219G
Harvester
implementation
2000
x670
1219C
Periodic integer number
implementation
,
strings
1700
x1802
1218I
The Light Square
2-sat
,
dfs and similar
,
greedy
2100
x610
1218H
Function Composition
dfs and similar
2900
x134
1218G
Alpha planetary system
constructive algorithms
,
graphs
,
shortest paths
3000
x100
1218F
Workout plan
data structures
,
greedy
1500
x2971
1218E
Product Tuples
divide and conquer
,
fft
2500
x383
1218D
Xor Spanning Tree
divide and conquer
,
fft
,
graphs
2400
x507
1218C
Jumping Transformers
dp
2600
x184
1218B
Guarding warehouses
data structures
,
geometry
3000
x73
1218A
BubbleReactor
dp
,
graphs
2800
x159
1217F
Forced Online Queries Problem
data structures
,
divide and conquer
,
dsu
,
graphs
,
trees
2600
x602
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