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Rayan
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Before contest
Rayan Programming Contest 2024 - Selection (Codeforces Round 989, Div. 1 + Div. 2)
3 days
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*has extra registration
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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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Problems
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Status
Standings
Custom test
Problems
#
Name
1341B
Nastya and Door
greedy
,
implementation
1300
x19762
1341A
Nastya and Rice
math
900
x29139
1340F
Nastya and CBS
brute force
,
data structures
,
hashing
3300
x511
1340E
Nastya and Bees
graphs
,
interactive
,
probabilities
3000
x53
1340D
Nastya and Time Machine
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2600
x995
1340C
Nastya and Unexpected Guest
dfs and similar
,
dp
,
graphs
,
shortest paths
2400
x2263
1340B
Nastya and Scoreboard
bitmasks
,
dp
,
graphs
,
greedy
1700
x7878
1340A
Nastya and Strange Generator
brute force
,
data structures
,
greedy
,
implementation
1500
x13433
1339B
Sorted Adjacent Differences
constructive algorithms
,
sortings
1200
x26602
1339A
Filling Diamonds
brute force
,
dp
,
implementation
,
math
900
x32236
1338E
JYPnation
graphs
3500
x247
1338D
Nested Rubber Bands
constructive algorithms
,
dfs and similar
,
dp
,
math
,
trees
2700
x1029
1338C
Perfect Triples
bitmasks
,
brute force
,
constructive algorithms
,
divide and conquer
,
math
2200
x3244
1338B
Edge Weight Assignment
bitmasks
,
constructive algorithms
,
dfs and similar
,
greedy
,
math
,
trees
1800
x8521
1338A
Powered Addition
greedy
,
math
1500
x24374
1337B
Kana and Dragon Quest game
greedy
,
implementation
,
math
900
x34463
1337A
Ichihime and Triangle
constructive algorithms
,
math
800
x38675
1336F
Journey
data structures
,
divide and conquer
,
graphs
,
trees
3500
x222
1336E2
Chiori and Doll Picking (hard version)
bitmasks
,
brute force
,
combinatorics
,
math
3500
x308
1336E1
Chiori and Doll Picking (easy version)
bitmasks
,
brute force
,
combinatorics
,
math
2700
x691
1336D
Yui and Mahjong Set
constructive algorithms
,
interactive
3200
x478
1336C
Kaavi and Magic Spell
dp
,
strings
2200
x3627
1336B
Xenia and Colorful Gems
binary search
,
greedy
,
math
,
sortings
,
two pointers
1700
x11420
1336A
Linova and Kingdom
dfs and similar
,
dp
,
greedy
,
sortings
,
trees
1600
x20638
1335F
Robots on a Grid
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
matrices
2200
x2201
1335E2
Three Blocks Palindrome (hard version)
brute force
,
data structures
,
dp
,
two pointers
1800
x8390
1335E1
Three Blocks Palindrome (easy version)
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x10899
1335D
Anti-Sudoku
constructive algorithms
,
implementation
1300
x27566
1335C
Two Teams Composing
binary search
,
greedy
,
implementation
,
sortings
1100
x34979
1335B
Construct the String
constructive algorithms
900
x38774
1335A
Candies and Two Sisters
math
800
x86379
1334G
Substring Search
bitmasks
,
brute force
,
fft
2900
x375
1334F
Strange Function
binary search
,
data structures
,
dp
,
greedy
2500
x1325
1334E
Divisor Paths
combinatorics
,
graphs
,
greedy
,
math
,
number theory
2200
x2858
1334D
Minimum Euler Cycle
constructive algorithms
,
graphs
,
greedy
,
implementation
1800
x7350
1334C
Circle of Monsters
brute force
,
constructive algorithms
,
greedy
,
math
1600
x16746
1334B
Middle Class
greedy
,
sortings
1100
x25982
1334A
Level Statistics
implementation
,
math
1200
x23378
1333F
Kate and imperfection
greedy
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2200
x4290
1333E
Road to 1600
brute force
,
constructive algorithms
2400
x1705
1333D
Challenges in school №41
brute force
,
constructive algorithms
,
games
,
graphs
,
greedy
,
implementation
,
sortings
2100
x3950
1333C
Eugene and an array
binary search
,
data structures
,
implementation
,
two pointers
1700
x12647
1333B
Kind Anton
greedy
,
implementation
1100
x21664
1333A
Little Artem
constructive algorithms
1000
x24678
1332G
No Monotone Triples
data structures
3100
x302
1332F
Independent Set
dfs and similar
,
dp
,
trees
2500
x1020
1332E
Height All the Same
combinatorics
,
constructive algorithms
,
math
,
matrices
2100
x3880
1332D
Walk on Matrix
bitmasks
,
constructive algorithms
,
math
1700
x8202
1332C
K-Complete Word
dfs and similar
,
dsu
,
greedy
,
implementation
,
strings
1500
x16834
1332B
Composite Coloring
brute force
,
constructive algorithms
,
greedy
,
math
,
number theory
1400
x17681
1332A
Exercising Walk
greedy
,
implementation
,
math
1100
x19444
1331H
It's showtime
*special problem
x626
1331G
Lingua Romana
*special problem
x505
1331F
Elementary!
*special problem
,
brute force
,
dp
,
strings
x569
1331E
Jordan Smiley
*special problem
,
dfs and similar
,
geometry
,
implementation
x1213
1331D
Again?
*special problem
,
implementation
x11902
1331C
...And after happily lived ever they
*special problem
,
bitmasks
x3156
1331B
Limericks
*special problem
,
math
,
number theory
x7015
1331A
Is it rated?
*special problem
x17124
1330B
Dreamoon Likes Permutations
implementation
,
math
1400
x14095
1330A
Dreamoon and Ranking Collection
implementation
900
x18816
1329E
Dreamoon Loves AA
binary search
,
greedy
3300
x186
1329D
Dreamoon Likes Strings
constructive algorithms
,
data structures
3100
x401
1329C
Drazil Likes Heap
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x1716
1329B
Dreamoon Likes Sequences
bitmasks
,
combinatorics
,
math
1700
x6717
1329A
Dreamoon Likes Coloring
constructive algorithms
,
greedy
,
implementation
,
math
1800
x9185
1328F
Make k Equal
greedy
2200
x3264
1328E
Tree Queries
dfs and similar
,
graphs
,
trees
1900
x9745
1328D
Carousel
constructive algorithms
,
dp
,
graphs
,
greedy
,
math
1800
x13302
1328C
Ternary XOR
greedy
,
implementation
1200
x30682
1328B
K-th Beautiful String
binary search
,
brute force
,
combinatorics
,
implementation
,
math
1300
x29351
1328A
Divisibility Problem
math
800
x104958
1327G
Letters and Question Marks
bitmasks
,
dp
,
string suffix structures
2800
x429
1327F
AND Segments
bitmasks
,
combinatorics
,
data structures
,
dp
,
two pointers
2500
x1699
1327E
Count The Blocks
combinatorics
,
dp
,
math
1800
x9014
1327D
Infinite Path
brute force
,
dfs and similar
,
graphs
,
math
,
number theory
2200
x3304
1327C
Game with Chips
constructive algorithms
,
implementation
1600
x13465
1327B
Princesses and Princes
brute force
,
graphs
,
greedy
1200
x18760
1327A
Sum of Odd Integers
math
1100
x39466
1326G
Spiderweb Trees
dp
,
geometry
,
trees
3500
x81
1326F2
Wise Men (Hard Version)
bitmasks
,
dp
,
math
3200
x486
1326F1
Wise Men (Easy Version)
bitmasks
,
brute force
,
dp
,
meet-in-the-middle
2600
x847
1326E
Bombs
data structures
,
two pointers
2400
x2196
1326D2
Prefix-Suffix Palindrome (Hard version)
binary search
,
greedy
,
hashing
,
string suffix structures
,
strings
1800
x10269
1326D1
Prefix-Suffix Palindrome (Easy version)
hashing
,
string suffix structures
,
strings
1500
x12171
1326C
Permutation Partitions
combinatorics
,
greedy
,
math
1300
x15685
1326B
Maximums
implementation
,
math
900
x24141
1326A
Bad Ugly Numbers
constructive algorithms
,
number theory
1000
x30561
1325F
Ehab's Last Theorem
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
2500
x2002
1325E
Ehab's REAL Number Theory Problem
brute force
,
dfs and similar
,
graphs
,
number theory
,
shortest paths
2600
x2074
1325D
Ehab the Xorcist
bitmasks
,
constructive algorithms
,
greedy
,
number theory
1700
x12202
1325C
Ehab and Path-etic MEXs
constructive algorithms
,
dfs and similar
,
greedy
,
trees
1500
x13807
1325B
CopyCopyCopyCopyCopy
greedy
,
implementation
800
x36245
1325A
EhAb AnD gCd
constructive algorithms
,
greedy
,
number theory
800
x40594
1324F
Maximum White Subtree
dfs and similar
,
dp
,
graphs
,
trees
1800
x10216
1324E
Sleeping Schedule
dp
,
implementation
1700
x13763
1324D
Pair of Topics
binary search
,
data structures
,
sortings
,
two pointers
1400
x28845
1324C
Frog Jumps
binary search
,
data structures
,
dfs and similar
,
greedy
,
implementation
1100
x28165
1324B
Yet Another Palindrome Problem
brute force
,
strings
1100
x28670
1324A
Yet Another Tetris Problem
implementation
,
number theory
900
x26072
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