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Rayan
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Before contest
Codeforces Round 997 (Div. 2)
32:25:34
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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
1037B
Reach Median
greedy
1300
x10448
1037A
Packets
constructive algorithms
,
greedy
,
math
1300
x11272
1036D
Vasya and Arrays
greedy
,
two pointers
1600
x9440
1036B
Diagonal Walking v.2
math
1600
x5731
1033C
Permutation Game
brute force
,
dp
,
games
1600
x5662
1032C
Playing Piano
constructive algorithms
,
dp
1700
x4034
1031C
Cram Time
greedy
1600
x5369
1031B
Curiosity Has No Limits
1500
x3947
1030C
Vasya and Golden Ticket
implementation
1300
x9500
1029C
Maximal Intersection
greedy
,
math
,
sortings
1600
x7653
1029A
Many Equal Substrings
implementation
,
strings
1300
x12473
1028C
Rectangles
geometry
,
implementation
,
sortings
1600
x4641
1027D
Mouse Hunt
dfs and similar
,
graphs
1700
x7617
1027C
Minimum Value Rectangle
greedy
1600
x6931
1025C
Plasticine zebra
constructive algorithms
,
implementation
1600
x6189
1025B
Weakened Common Divisor
brute force
,
greedy
,
number theory
1600
x8018
1023D
Array Restoration
constructive algorithms
,
data structures
1700
x4057
1019A
Elections
brute force
,
greedy
1700
x4665
1017C
The Phone Number
constructive algorithms
,
greedy
1600
x6061
1016B
Segment Occurrences
brute force
,
implementation
1300
x9574
1015E1
Stars Drawing (Easy Edition)
brute force
,
dp
,
greedy
1700
x5995
1015D
Walking Between Houses
constructive algorithms
,
greedy
1600
x8357
1012A
Photo of The Sky
brute force
,
implementation
,
math
,
sortings
1500
x6454
1010A
Fly
binary search
,
math
1500
x8120
1009D
Relatively Prime Graph
brute force
,
constructive algorithms
,
graphs
,
greedy
,
math
1700
x6296
1009C
Annoying Present
greedy
,
math
1700
x5318
1009B
Minimum Ternary String
greedy
,
implementation
1400
x10207
1007A
Reorder the Array
combinatorics
,
data structures
,
math
,
sortings
,
two pointers
1300
x12251
1006E
Military Problem
dfs and similar
,
graphs
,
trees
1600
x10127
1006D
Two Strings Swaps
implementation
1700
x6046
1005D
Polycarp and Div 3
dp
,
greedy
,
number theory
1500
x10342
1005C
Summarize to the Power of Two
brute force
,
greedy
,
implementation
1300
x11870
1004C
Sonya and Robots
constructive algorithms
,
implementation
1400
x7578
1004B
Sonya and Exhibition
constructive algorithms
,
greedy
,
implementation
,
math
1300
x9568
1003D
Coins and Queries
greedy
1600
x7897
1003C
Intense Heat
brute force
,
implementation
,
math
1300
x10720
1003B
Binary String Constructing
constructive algorithms
1300
x11467
1002E1
Bernstein-Vazirani algorithm
*special problem
1500
x323
1002D3
Oracle for majority function
*special problem
1600
x335
1002D2
Oracle for f(x) = b * x + (1 - b) * (1 - x) mod 2
*special problem
1300
x384
1002C1
Distinguish zero state and plus state with minimum error
*special problem
1700
x303
1002B4
Distinguish four 2-qubit states - 2
*special problem
1700
x311
1002B3
Distinguish four 2-qubit states
*special problem
1600
x413
1002B2
Distinguish GHZ state and W state
*special problem
1600
x448
1002B1
Distinguish zero state and W state
*special problem
1300
x480
1002A3
Generate superposition of two basis states
*special problem
1500
x478
1002A2
Generate superposition of zero state and a basis state
*special problem
1300
x561
1001I
Deutsch-Jozsa algorithm
*special problem
1700
x403
1001G
Oracle for f(x) = k-th element of x
*special problem
1400
x540
1001F
Distinguish multi-qubit basis states
*special problem
1300
x542
1001E
Distinguish Bell states
*special problem
1600
x559
1001D
Distinguish plus state and minus state
*special problem
1400
x685
1001C
Generate GHZ state
*special problem
1400
x657
1001B
Generate Bell state
*special problem
1400
x714
1000C
Covered Points Count
data structures
,
implementation
,
sortings
1700
x6935
1000B
Light It Up
greedy
1500
x5937
997A
Convert to Ones
brute force
,
greedy
,
implementation
,
math
1500
x8357
996B
World Cup
binary search
,
math
1300
x9168
995B
Suit and Tie
greedy
,
implementation
,
math
1400
x7131
994B
Knights of a Polygonal Table
greedy
,
implementation
,
sortings
1400
x5768
993A
Two Squares
geometry
,
implementation
1600
x4181
992C
Nastya and a Wardrobe
math
1600
x4634
992B
Nastya Studies Informatics
math
,
number theory
1600
x6341
991D
Bishwock
dp
,
greedy
1500
x7276
991C
Candies
binary search
,
implementation
1500
x10673
990D
Graph And Its Complement
constructive algorithms
,
graphs
,
implementation
1700
x3875
990C
Bracket Sequences Concatenation Problem
implementation
1500
x5964
988C
Equal Sums
implementation
,
sortings
1400
x10350
987C
Three displays
brute force
,
dp
,
implementation
1400
x13745
986A
Fair
graphs
,
greedy
,
number theory
,
shortest paths
1600
x7103
985C
Liebig's Barrels
greedy
1500
x5809
983A
Finite or not?
implementation
,
math
1700
x4570
982C
Cut 'em all!
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
1500
x11956
982B
Bus of Characters
data structures
,
greedy
,
implementation
1300
x8432
981C
Useful Decomposition
implementation
,
trees
1400
x5598
980C
Posterized
games
,
greedy
1700
x3808
980B
Marlin
constructive algorithms
1600
x4755
979C
Kuro and Walking Route
dfs and similar
,
trees
1600
x6445
978G
Petya's Exams
greedy
,
implementation
,
sortings
1700
x4438
978F
Mentors
binary search
,
data structures
,
implementation
1500
x8459
978E
Bus Video System
combinatorics
,
math
1400
x9700
978D
Almost Arithmetic Progression
brute force
,
implementation
,
math
1500
x8965
977F
Consecutive Subsequence
dp
1700
x20052
977E
Cyclic Components
dfs and similar
,
dsu
,
graphs
1500
x21365
977D
Divide by three, multiply by two
dfs and similar
,
math
,
sortings
1400
x18723
976C
Nested Segments
greedy
,
implementation
,
sortings
1500
x7231
976B
Lara Croft and the New Game
implementation
,
math
1300
x5757
975C
Valhalla Siege
binary search
1400
x9836
965B
Battleship
implementation
1300
x4601
964B
Messages
math
1300
x4392
962D
Merge Equals
data structures
,
implementation
1600
x6988
962C
Make a Square
brute force
,
implementation
,
math
1400
x7947
962B
Students in Railway Carriage
constructive algorithms
,
greedy
,
implementation
1300
x7760
962A
Equator
implementation
1300
x12899
961C
Chessboard
bitmasks
,
brute force
,
implementation
1400
x5336
960C
Subsequence Counting
bitmasks
,
constructive algorithms
,
greedy
,
implementation
1700
x3945
960B
Minimize the error
data structures
,
greedy
,
sortings
1500
x8436
959C
Mahmoud and Ehab and the wrong algorithm
constructive algorithms
,
trees
1500
x5829
958F1
Lightsabers (easy)
implementation
1500
x1702
958E1
Guard Duty (easy)
brute force
,
geometry
,
greedy
,
math
1600
x1559
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