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Rayan
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Before contest
Codeforces Round 1006 (Div. 3)
21:05:41
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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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Custom test
Problems
#
Name
817A
Treasure Hunt
implementation
,
math
,
number theory
1200
x6363
816B
Karen and Coffee
binary search
,
data structures
,
implementation
1400
x19767
816A
Karen and Morning
brute force
,
implementation
1000
x9239
815E
Karen and Neighborhood
binary search
,
constructive algorithms
,
implementation
2900
x227
815D
Karen and Cards
binary search
,
combinatorics
,
data structures
,
geometry
2800
x637
815C
Karen and Supermarket
brute force
,
dp
,
trees
2400
x2765
815B
Karen and Test
brute force
,
combinatorics
,
constructive algorithms
,
math
2200
x1389
815A
Karen and Game
brute force
,
greedy
,
implementation
1700
x5695
814E
An unavoidable detour for home
combinatorics
,
dp
,
graphs
,
shortest paths
2600
x684
814D
An overnight dance in discotheque
dfs and similar
,
dp
,
geometry
,
greedy
,
trees
2000
x2379
814C
An impassioned circulation of affection
brute force
,
dp
,
strings
,
two pointers
1600
x6842
814B
An express train to reveries
constructive algorithms
1300
x5673
814A
An abandoned sentiment from past
constructive algorithms
,
greedy
,
implementation
,
sortings
900
x10675
813F
Bipartite Checking
data structures
,
dsu
,
graphs
2500
x1410
813E
Army Creation
binary search
,
data structures
2200
x2552
813D
Two Melodies
dp
,
flows
2600
x1047
813C
The Tag Game
dfs and similar
,
graphs
1700
x6302
813B
The Golden Age
brute force
,
math
1800
x4068
813A
The Contest
implementation
1100
x5138
812E
Sagheer and Apple Tree
games
,
trees
2300
x1124
812D
Sagheer and Kindergarten
dfs and similar
,
graphs
,
implementation
,
trees
2700
x336
812C
Sagheer and Nubian Market
binary search
,
sortings
1500
x14973
812B
Sagheer, the Hausmeister
bitmasks
,
brute force
,
dp
1600
x5291
812A
Sagheer and Crossroads
implementation
1200
x6281
811E
Vladik and Entertaining Flags
data structures
,
dsu
,
graphs
2600
x892
811D
Vladik and Favorite Game
constructive algorithms
,
dfs and similar
,
graphs
,
interactive
2100
x1797
811C
Vladik and Memorable Trip
dp
,
implementation
1900
x3332
811B
Vladik and Complicated Book
implementation
,
sortings
1200
x6574
811A
Vladik and Courtesy
brute force
,
implementation
800
x12020
810B
Summer sell-off
greedy
,
sortings
1300
x11849
810A
Straight <<A>>
implementation
,
math
900
x8910
809E
Surprise me!
divide and conquer
,
math
,
number theory
,
trees
3100
x754
809D
Hitchhiking in the Baltic States
data structures
,
dp
2900
x888
809C
Find a car
combinatorics
,
divide and conquer
,
dp
2600
x831
809B
Glad to see you!
binary search
,
interactive
2200
x1693
809A
Do you want a date?
implementation
,
math
,
sortings
1500
x4738
808G
Anthem of Berland
dp
,
strings
2300
x2959
808F
Card Game
binary search
,
flows
,
graphs
2400
x1293
808E
Selling Souvenirs
binary search
,
dp
,
greedy
,
ternary search
2300
x1914
808D
Array Division
binary search
,
data structures
,
implementation
1900
x7142
808C
Tea Party
constructive algorithms
,
greedy
,
sortings
1400
x6349
808B
Average Sleep Time
data structures
,
implementation
,
math
1300
x8845
808A
Lucky Year
implementation
900
x9632
807B
T-Shirt Hunt
brute force
,
implementation
1300
x3561
807A
Is it rated?
implementation
,
sortings
900
x21323
805B
3-palindrome
constructive algorithms
1000
x17569
805A
Fake NP
greedy
,
math
1000
x18293
804F
Fake bullions
combinatorics
,
dfs and similar
,
dp
,
graphs
,
number theory
3400
x166
804E
The same permutation
constructive algorithms
3100
x504
804D
Expected diameter of a tree
binary search
,
brute force
,
dfs and similar
,
dp
,
sortings
,
trees
2500
x1402
804C
Ice cream coloring
constructive algorithms
,
dfs and similar
,
greedy
2200
x1850
804B
Minimum number of steps
combinatorics
,
greedy
,
implementation
,
math
1400
x9770
804A
Find Amir
constructive algorithms
,
greedy
,
math
1000
x15666
803G
Periodic RMQ Problem
data structures
2300
x1639
803F
Coprime Subsequences
bitmasks
,
combinatorics
,
number theory
2000
x3526
803E
Roma and Poker
dp
,
graphs
2000
x2314
803D
Magazine Ad
binary search
,
greedy
1900
x3434
803C
Maximal GCD
constructive algorithms
,
greedy
,
math
1900
x5257
803B
Distances to Zero
constructive algorithms
1200
x6832
803A
Maximal Binary Matrix
constructive algorithms
1400
x5007
802O
April Fools' Problem (hard)
binary search
,
data structures
,
flows
2900
x1021
802N
April Fools' Problem (medium)
binary search
,
flows
,
graphs
2400
x1259
802M
April Fools' Problem (easy)
greedy
,
sortings
1200
x3227
802L
Send the Fool Further! (hard)
dfs and similar
,
dp
,
math
,
trees
2400
x325
802K
Send the Fool Further! (medium)
dp
,
trees
2100
x651
802J
Send the Fool Further! (easy)
dfs and similar
,
graphs
,
trees
1400
x5035
802I
Fake News (hard)
string suffix structures
2300
x1597
802H
Fake News (medium)
constructive algorithms
,
strings
2200
x493
802G
Fake News (easy)
implementation
,
strings
800
x7271
802F
Marmots (hard)
math
,
probabilities
2800
x141
802E
Marmots (medium)
math
2200
x270
802D
Marmots (easy)
math
2100
x483
802C
Heidi and Library (hard)
flows
2600
x616
802B
Heidi and Library (medium)
data structures
,
greedy
1800
x1173
802A
Heidi and Library (easy)
greedy
1800
x1412
801B
Valued Keys
constructive algorithms
,
greedy
,
strings
900
x10543
801A
Vicious Keyboard
brute force
1100
x7397
799G
Cut the pie
binary search
,
data structures
,
geometry
3500
x117
799F
Beautiful fountains rows
data structures
3500
x466
799E
Aquarium decoration
data structures
,
greedy
,
two pointers
2500
x943
799D
Field expansion
brute force
,
dp
,
meet-in-the-middle
2100
x2079
799C
Fountains
binary search
,
data structures
,
implementation
1800
x3821
799B
T-shirt buying
data structures
,
implementation
1400
x9111
799A
Carrot Cakes
brute force
,
implementation
1100
x19429
798E
Mike and code of a permutation
constructive algorithms
,
data structures
,
graphs
,
sortings
3000
x504
798D
Mike and distribution
constructive algorithms
,
sortings
2400
x1990
798C
Mike and gcd problem
dp
,
greedy
,
number theory
1700
x5947
798B
Mike and strings
brute force
,
dp
,
strings
1300
x8582
798A
Mike and palindrome
brute force
,
constructive algorithms
,
strings
1000
x22379
797F
Mice and Holes
data structures
,
dp
,
greedy
,
sortings
2600
x1272
797E
Array Queries
brute force
,
data structures
,
dp
2000
x4612
797D
Broken BST
data structures
,
dfs and similar
2100
x1875
797C
Minimal string
data structures
,
greedy
,
strings
1700
x7021
797B
Odd sum
dp
,
greedy
,
implementation
1400
x10772
797A
k-Factorization
implementation
,
math
,
number theory
1100
x16422
796F
Sequence Recovery
bitmasks
,
data structures
,
greedy
2800
x186
796E
Exam Cheating
binary search
,
dp
2400
x694
796D
Police Stations
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
2100
x6028
796C
Bank Hacking
constructive algorithms
,
data structures
,
dp
,
trees
1900
x3094
796B
Find The Bone
implementation
1300
x9241
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