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Rayan
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Before contest
Codeforces Round 1006 (Div. 3)
31:53:17
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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
535C
Tavas and Karafs
binary search
,
greedy
,
math
1900
x3814
535B
Tavas and SaDDas
bitmasks
,
brute force
,
combinatorics
,
implementation
1100
x23111
535A
Tavas and Nafas
brute force
,
implementation
1000
x12392
534F
Simplified Nonogram
bitmasks
,
dp
,
hashing
,
meet-in-the-middle
2400
x493
534E
Berland Local Positioning System
constructive algorithms
,
greedy
,
hashing
,
implementation
2400
x372
534D
Handshakes
binary search
,
constructive algorithms
,
data structures
,
greedy
1900
x2450
534C
Polycarpus' Dice
math
1600
x5084
534B
Covered Path
dp
,
greedy
,
math
1400
x10514
534A
Exam
constructive algorithms
,
implementation
,
math
1100
x12466
533F
Encoding
hashing
,
string suffix structures
,
strings
2400
x918
533E
Correcting Mistakes
constructive algorithms
,
dp
,
greedy
,
hashing
,
strings
,
two pointers
1800
x2297
533D
Landmarks
data structures
,
dp
3000
x239
533C
Board Game
games
,
greedy
,
implementation
,
math
1700
x2227
533B
Work Group
dfs and similar
,
dp
,
graphs
,
strings
,
trees
2000
x2475
533A
Berland Miners
binary search
,
data structures
,
dfs and similar
,
greedy
,
trees
3000
x410
530I
Different variables
*special problem
2500
x48
530H
Points in triangle
*special problem
,
geometry
2100
x124
530G
Levenshtein distance
*special problem
2100
x166
530F
Jumping frogs
*special problem
2100
x109
530E
Sum and product
*special problem
1700
x309
530D
Set subtraction
*special problem
1600
x454
530C
Diophantine equation
*special problem
1500
x558
530B
String inside out
*special problem
1600
x544
530A
Quadratic equation
*special problem
1500
x679
529B
Group Photo 2 (online mirror version)
brute force
,
greedy
,
sortings
1900
x881
528E
Triangles 3000
geometry
,
sortings
3100
x221
528D
Fuzzy Search
bitmasks
,
brute force
,
fft
2500
x2324
527E
Data Center Drama
dfs and similar
,
graphs
2600
x2047
527D
Clique Problem
data structures
,
dp
,
greedy
,
implementation
,
sortings
1800
x4842
527C
Glass Carving
binary search
,
data structures
,
implementation
1500
x7084
527B
Error Correct System
greedy
1500
x3904
527A
Playing with Paper
implementation
,
math
1100
x14684
526G
Spiders Evil Plan
greedy
,
trees
3300
x772
526F
Pudding Monsters
data structures
,
divide and conquer
3000
x2761
526E
Transmitting Levels
dp
,
implementation
2400
x1105
526D
Om Nom and Necklace
hashing
,
string suffix structures
,
strings
2200
x2202
526C
Om Nom and Candies
brute force
,
greedy
,
math
2000
x2553
526B
Om Nom and Dark Park
dfs and similar
,
greedy
,
implementation
1400
x4532
526A
King of Thieves
brute force
,
implementation
1300
x4819
525E
Anya and Cubes
binary search
,
bitmasks
,
brute force
,
dp
,
math
,
meet-in-the-middle
2100
x3462
525D
Arthur and Walls
constructive algorithms
,
data structures
,
graphs
,
greedy
,
shortest paths
2400
x1821
525C
Ilya and Sticks
greedy
,
math
,
sortings
1600
x5847
525B
Pasha and String
constructive algorithms
,
greedy
,
math
,
strings
1400
x9534
525A
Vitaliy and Pie
greedy
,
hashing
,
strings
1100
x15159
524F
And Yet Another Bracket Sequence
data structures
,
greedy
,
hashing
,
string suffix structures
,
strings
2700
x547
524E
Rooks and Rectangles
data structures
,
sortings
2400
x1228
524D
Social Network
greedy
,
two pointers
2100
x956
524C
The Art of Dealing with ATM
binary search
,
sortings
1900
x2066
524B
Фото на память - 2 (round version)
dp
,
greedy
1700
x1470
524A
Возможно, вы знаете этих людей?
implementation
1600
x1419
523D
Statistics of Recompressing Videos
*special problem
,
data structures
,
implementation
1600
x2364
523C
Name Quest
*special problem
,
greedy
1400
x2517
523B
Mean Requests
*special problem
,
implementation
1500
x953
523A
Rotate, Flip and Zoom
*special problem
,
implementation
1200
x2667
522D
Closest Equals
*special problem
,
data structures
2000
x3330
522C
Chicken or Fish?
greedy
2100
x726
522B
Photo to Remember
*special problem
,
data structures
,
dp
,
implementation
1100
x9089
522A
Reposts
*special problem
,
dfs and similar
,
dp
,
graphs
,
trees
1200
x16825
521E
Cycling City
dfs and similar
,
graphs
3100
x1093
521D
Shop
greedy
2800
x1642
520E
Pluses everywhere
combinatorics
,
dp
,
math
,
number theory
2200
x1911
520D
Cubes
games
,
greedy
,
implementation
2100
x1592
520C
DNA Alignment
math
,
strings
1500
x4204
520B
Two Buttons
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
,
shortest paths
1400
x53263
520A
Pangram
implementation
,
strings
800
x104467
519E
A and B and Lecture Rooms
binary search
,
data structures
,
dfs and similar
,
dp
,
trees
2100
x7201
519D
A and B and Interesting Substrings
data structures
,
dp
,
two pointers
1800
x6439
519C
A and B and Team Training
greedy
,
implementation
,
math
,
number theory
1300
x19996
519B
A and B and Compilation Errors
data structures
,
implementation
,
sortings
1100
x40488
519A
A and B and Chess
implementation
900
x19251
518F
Pasha and Pipe
binary search
,
brute force
,
combinatorics
,
dp
,
implementation
2300
x388
518E
Arthur and Questions
greedy
,
implementation
,
math
,
ternary search
2200
x1009
518D
Ilya and Escalator
combinatorics
,
dp
,
math
,
probabilities
1700
x7191
518C
Anya and Smartphone
constructive algorithms
,
data structures
,
implementation
1600
x6100
518B
Tanya and Postcard
greedy
,
implementation
,
strings
1400
x8094
518A
Vitaly and Strings
constructive algorithms
,
strings
1600
x9312
516E
Drazil and His Happy Friends
math
,
number theory
3100
x527
516D
Drazil and Morning Exercise
dfs and similar
,
dp
,
dsu
,
trees
,
two pointers
2800
x1340
515E
Drazil and Park
data structures
2300
x2211
515D
Drazil and Tiles
constructive algorithms
,
greedy
2000
x2875
515C
Drazil and Factorial
greedy
,
math
,
sortings
1400
x26631
515B
Drazil and His Happy Friends
brute force
,
dsu
,
meet-in-the-middle
,
number theory
1300
x7515
515A
Drazil and Date
math
1000
x20670
514E
Darth Vader and Tree
dp
,
matrices
2200
x1469
514D
R2D2 and Droid Army
binary search
,
data structures
,
two pointers
2000
x4624
514C
Watto and Mechanism
binary search
,
data structures
,
hashing
,
string suffix structures
,
strings
2000
x7114
514B
Han Solo and Lazer Gun
brute force
,
data structures
,
geometry
,
implementation
,
math
1400
x21268
514A
Chewbaсca and Number
greedy
,
implementation
1200
x56760
513G3
Inversions problem
dp
3100
x271
513G2
Inversions problem
dp
,
probabilities
2400
x667
513G1
Inversions problem
brute force
,
dfs and similar
,
dp
,
meet-in-the-middle
1800
x1798
513F2
Scaygerboss
flows
2800
x364
513F1
Scaygerboss
flows
2700
x329
513E2
Subarray Cuts
dp
2700
x614
513E1
Subarray Cuts
dp
2600
x512
513D2
Constrained Tree
constructive algorithms
,
data structures
2600
x386
513D1
Constrained Tree
dfs and similar
2400
x622
513C
Second price auction
bitmasks
,
probabilities
2000
x1572
513B2
Permutations
bitmasks
,
divide and conquer
,
math
1800
x2830
513B1
Permutations
brute force
1400
x3736
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