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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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Problems
#
Name
1036C
Classy Numbers
combinatorics
,
dp
1900
x9820
1036B
Diagonal Walking v.2
math
1600
x5723
1034E
Little C Loves 3 III
bitmasks
,
dp
,
math
3200
x644
1034D
Intervals of Intervals
binary search
,
data structures
,
two pointers
3500
x457
1034C
Region Separation
combinatorics
,
dp
,
number theory
,
trees
2700
x888
1034B
Little C Loves 3 II
brute force
,
constructive algorithms
,
flows
,
graph matchings
2200
x2156
1034A
Enlarge GCD
number theory
1800
x8807
1033G
Chip Game
games
3500
x387
1033F
Boolean Computer
bitmasks
,
brute force
,
fft
,
math
2800
x393
1033E
Hidden Bipartite Graph
binary search
,
constructive algorithms
,
dfs and similar
,
graphs
,
interactive
2800
x657
1033D
Divisors
interactive
,
math
,
number theory
2000
x2406
1033C
Permutation Game
brute force
,
dp
,
games
1600
x5624
1032G
Chattering
2900
x466
1032F
Vasya and Maximum Matching
dp
,
trees
2400
x969
1032E
The Unbearable Lightness of Weights
dp
,
math
2100
x1692
1032D
Barcelonian Distance
geometry
,
implementation
1900
x2842
1032C
Playing Piano
constructive algorithms
,
dp
1700
x3999
1031F
Familiar Operations
brute force
,
graphs
,
math
2800
x280
1031E
Triple Flips
constructive algorithms
2600
x533
1031D
Minimum path
greedy
1900
x2818
1031C
Cram Time
greedy
1600
x5330
1030G
Linear Congruential Generator
number theory
2900
x368
1030F
Putting Boxes Together
data structures
2500
x819
1030E
Vasya and Good Sequences
bitmasks
,
dp
2000
x3113
1030D
Vasya and Triangle
geometry
,
number theory
1800
x5976
1029F
Multicolored Markers
binary search
,
brute force
,
math
,
number theory
2000
x2588
1029E
Tree with Small Distances
dp
,
graphs
,
greedy
2100
x2957
1029D
Concatenated Multiples
implementation
,
math
1900
x3894
1029C
Maximal Intersection
greedy
,
math
,
sortings
1600
x7602
1028H
Make Square
math
2900
x496
1028G
Guess the number
dp
,
interactive
3000
x575
1028F
Make Symmetrical
brute force
2900
x525
1028E
Restore Array
constructive algorithms
2400
x1146
1028D
Order book
combinatorics
,
data structures
,
greedy
2100
x1747
1028C
Rectangles
geometry
,
implementation
,
sortings
1600
x4614
1027G
X-mouse in the Campus
bitmasks
,
math
,
number theory
2600
x310
1027F
Session in BSU
binary search
,
dfs and similar
,
dsu
,
graph matchings
,
graphs
2400
x1565
1027E
Inverse Coloring
combinatorics
,
dp
,
math
2100
x2141
1027D
Mouse Hunt
dfs and similar
,
graphs
1700
x7558
1027C
Minimum Value Rectangle
greedy
1600
x6919
1025G
Company Acquisitions
constructive algorithms
,
math
3200
x737
1025F
Disjoint Triangles
geometry
2700
x698
1025E
Colored Cubes
constructive algorithms
,
implementation
,
matrices
2700
x571
1025D
Recovering BST
brute force
,
dp
,
math
,
number theory
,
trees
2100
x3672
1025C
Plasticine zebra
constructive algorithms
,
implementation
1600
x6146
1025B
Weakened Common Divisor
brute force
,
greedy
,
number theory
1600
x7922
1023G
Pisces
data structures
,
flows
,
trees
3400
x129
1023F
Mobile Phone Network
dfs and similar
,
dsu
,
graphs
,
trees
2600
x889
1023E
Down or Right
constructive algorithms
,
interactive
,
matrices
2100
x2039
1023D
Array Restoration
constructive algorithms
,
data structures
1700
x4048
1019E
Raining season
data structures
,
divide and conquer
,
trees
3200
x340
1019D
Large Triangle
binary search
,
geometry
,
sortings
2700
x650
1019C
Sergey's problem
constructive algorithms
,
graphs
3000
x1125
1019B
The hat
binary search
,
interactive
2000
x1965
1019A
Elections
brute force
,
greedy
1700
x4653
1017H
The Films
brute force
3300
x147
1017G
The Tree
data structures
3200
x914
1017F
The Neutral Zone
brute force
,
math
2500
x821
1017E
The Supersonic Rocket
geometry
,
hashing
,
strings
2400
x1028
1017D
The Wu
bitmasks
,
brute force
,
data structures
1900
x3550
1017C
The Phone Number
constructive algorithms
,
greedy
1600
x6034
1016G
Appropriate Team
bitmasks
,
math
,
number theory
2700
x266
1016F
Road Projects
dfs and similar
,
dp
,
trees
2600
x818
1016E
Rest In The Shades
binary search
,
geometry
2400
x1160
1016D
Vasya And The Matrix
constructive algorithms
,
flows
,
math
1800
x4722
1016C
Vasya And The Mushrooms
dp
,
implementation
1800
x3770
1015F
Bracket Substring
dp
,
strings
2300
x1140
1015E2
Stars Drawing (Hard Edition)
binary search
,
dp
,
greedy
1900
x3630
1015E1
Stars Drawing (Easy Edition)
brute force
,
dp
,
greedy
1700
x5893
1015D
Walking Between Houses
constructive algorithms
,
greedy
1600
x8256
1012F
Passports
dp
,
implementation
3400
x158
1012E
Cycle sort
dsu
,
math
3100
x331
1012D
AB-Strings
constructive algorithms
,
strings
2800
x381
1012C
Hills
dp
1900
x3511
1012B
Chemical table
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
matrices
1900
x4038
1010F
Tree
fft
,
graphs
,
trees
3400
x219
1010E
Store
data structures
2700
x337
1010D
Mars rover
dfs and similar
,
graphs
,
implementation
,
trees
2000
x2388
1010C
Border
number theory
1800
x4876
1010B
Rocket
binary search
,
interactive
1800
x5198
1009G
Allowed Letters
bitmasks
,
flows
,
graph matchings
,
graphs
,
greedy
2400
x836
1009F
Dominant Indices
data structures
,
dsu
,
trees
2300
x5840
1009E
Intercity Travelling
combinatorics
,
math
,
probabilities
2000
x3013
1009D
Relatively Prime Graph
brute force
,
constructive algorithms
,
graphs
,
greedy
,
math
1700
x6269
1009C
Annoying Present
greedy
,
math
1700
x5309
1007E
Mini Metro
dp
3400
x219
1007D
Ants
2-sat
,
data structures
,
trees
3200
x292
1007C
Guess two numbers
binary search
,
interactive
3000
x419
1007B
Pave the Parallelepiped
bitmasks
,
brute force
,
combinatorics
,
math
,
number theory
2400
x955
1006F
Xor-Paths
bitmasks
,
brute force
,
dp
,
meet-in-the-middle
2100
x5441
1006E
Military Problem
dfs and similar
,
graphs
,
trees
1600
x9981
1006D
Two Strings Swaps
implementation
1700
x6015
1005F
Berland and the Shortest Paths
brute force
,
dfs and similar
,
graphs
,
shortest paths
2100
x1761
1005E2
Median on Segments (General Case Edition)
sortings
2400
x1302
1005E1
Median on Segments (Permutations Edition)
sortings
1800
x3929
1004F
Sonya and Bitwise OR
bitmasks
,
data structures
,
divide and conquer
2600
x768
1004E
Sonya and Ice Cream
binary search
,
data structures
,
dp
,
greedy
,
shortest paths
,
trees
2400
x1074
1004D
Sonya and Matrix
brute force
,
constructive algorithms
,
implementation
2300
x1428
1003F
Abbreviation
dp
,
hashing
,
strings
2200
x1372
1003E
Tree Constructing
constructive algorithms
,
graphs
2100
x2723
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