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Codeforces Round 987 (Div. 2)
08:06:34
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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
1530B
Putting Plates
constructive algorithms
,
implementation
800
x15808
1530A
Binary Decimal
greedy
,
math
800
x21123
1529B
Sifid and Strange Subsequences
greedy
,
math
,
sortings
1100
x20609
1529A
Eshag Loves Big Arrays
constructive algorithms
,
greedy
,
math
800
x29833
1527B1
Palindrome Game (easy version)
constructive algorithms
,
games
1200
x26425
1527A
And Then There Were K
bitmasks
800
x35985
1526A
Mean Inequality
constructive algorithms
,
sortings
800
x24239
1525B
Permutation Sort
constructive algorithms
,
greedy
900
x24969
1525A
Potion-making
math
,
number theory
800
x25655
1523B
Lord of the Values
constructive algorithms
1100
x12120
1523A
Game of Life
implementation
800
x13517
1521A
Nastia and Nearly Good Numbers
constructive algorithms
,
math
,
number theory
1000
x37512
1520D
Same Differences
data structures
,
hashing
,
math
1200
x47815
1520C
Not Adjacent Matrix
constructive algorithms
1000
x31954
1520B
Ordinary Numbers
brute force
,
math
,
number theory
800
x44779
1520A
Do Not Be Distracted!
brute force
,
implementation
800
x52176
1519B
The Cake Is a Lie
dp
,
math
800
x31039
1519A
Red and Blue Beans
math
800
x29004
1517B
Morning Jogging
constructive algorithms
,
greedy
,
sortings
1200
x13281
1517A
Sum of 2050
greedy
,
math
800
x25610
1516A
Tit for Tat
greedy
800
x23504
1515B
Phoenix and Puzzle
brute force
,
geometry
,
math
,
number theory
1000
x25078
1515A
Phoenix and Gold
constructive algorithms
,
greedy
,
math
800
x20254
1514B
AND 0, Sum Big
bitmasks
,
combinatorics
,
math
1200
x25395
1514A
Perfectly Imperfect Array
math
,
number theory
800
x24273
1513A
Array and Peaks
constructive algorithms
,
implementation
800
x19437
1512D
Corrupted Array
constructive algorithms
,
data structures
,
greedy
1200
x22703
1512C
A-B Palindrome
constructive algorithms
,
implementation
,
strings
1200
x20317
1512B
Almost Rectangle
implementation
800
x25468
1512A
Spy Detected!
brute force
,
implementation
800
x65063
1511C
Yet Another Card Deck
brute force
,
data structures
,
implementation
,
trees
1100
x24205
1511B
GCD Length
constructive algorithms
,
math
,
number theory
1100
x23012
1511A
Review Site
greedy
800
x27727
1510K
King's Task
brute force
,
graphs
,
implementation
1200
x5504
1509B
TMT Document
greedy
1100
x21674
1509A
Average Height
constructive algorithms
800
x26065
1506C
Double-ended Strings
brute force
,
implementation
,
strings
1000
x25443
1506B
Partial Replacement
greedy
,
implementation
1100
x20278
1506A
Strange Table
math
800
x30742
1505A
Is it rated - 2
*special problem
,
implementation
,
interactive
900
x14585
1504B
Flip the Bits
constructive algorithms
,
greedy
,
implementation
,
math
1200
x18786
1504A
Déjà Vu
constructive algorithms
,
strings
800
x21774
1501B
Napoleon Cake
dp
,
implementation
,
sortings
900
x19293
1501A
Alexey and Train
implementation
800
x11634
1499B
Binary Removals
brute force
,
dp
,
greedy
,
implementation
1000
x20837
1499A
Domino on Windowsill
combinatorics
,
constructive algorithms
,
math
800
x21300
1498A
GCD Sum
brute force
,
math
800
x23339
1497C1
k-LCM (easy version)
constructive algorithms
,
math
1200
x26040
1497B
M-arrays
constructive algorithms
,
greedy
,
math
1200
x20195
1497A
Meximization
brute force
,
data structures
,
greedy
,
sortings
800
x24541
1496B
Max and Mex
math
1100
x17596
1496A
Split it!
brute force
,
constructive algorithms
,
greedy
,
strings
900
x21029
1495A
Diamond Miner
geometry
,
greedy
,
math
,
sortings
1200
x17132
1494A
ABC String
bitmasks
,
brute force
,
implementation
900
x20965
1493A
Anti-knapsack
constructive algorithms
,
greedy
800
x19344
1492B
Card Deck
data structures
,
greedy
,
math
1100
x18515
1492A
Three swimmers
math
800
x22704
1491B
Minimal Cost
brute force
,
math
1200
x13841
1491A
K-th Largest Value
brute force
,
greedy
,
implementation
800
x18262
1490D
Permutation Transformation
dfs and similar
,
divide and conquer
,
implementation
1200
x19643
1490C
Sum of Cubes
binary search
,
brute force
,
brute force
,
math
1100
x33633
1490B
Balanced Remainders
brute force
,
constructive algorithms
,
math
1000
x26297
1490A
Dense Array
greedy
,
math
800
x31283
1488A
From Zero To Y
*special problem
,
math
900
x1431
1487B
Cat Cycle
math
,
number theory
1200
x21350
1487A
Arena
implementation
,
sortings
800
x26595
1486A
Shifting Stacks
greedy
,
implementation
900
x25461
1485B
Replace and Keep Sorted
dp
,
implementation
,
math
1200
x17136
1485A
Add and Divide
brute force
,
greedy
,
math
,
number theory
1000
x22833
1482A
Prison Break
math
800
x20488
1481B
New Colony
brute force
,
greedy
,
implementation
1100
x19326
1481A
Space Navigation
greedy
,
strings
800
x24989
1480B
The Great Hero
greedy
,
implementation
,
sortings
900
x17259
1480A
Yet Another String Game
games
,
greedy
,
strings
800
x25930
1478B
Nezzar and Lucky Number
brute force
,
dp
,
greedy
,
math
1100
x18347
1478A
Nezzar and Colorful Balls
brute force
,
greedy
800
x26564
1476A
K-divisible Sum
binary search
,
constructive algorithms
,
greedy
,
math
1000
x38065
1475B
New Year's Number
brute force
,
dp
,
math
900
x49482
1475A
Odd Divisor
math
,
number theory
900
x62151
1474B
Different Divisors
binary search
,
constructive algorithms
,
greedy
,
math
,
number theory
1000
x29252
1474A
Puzzle From the Future
greedy
800
x22635
1473B
String LCM
brute force
,
math
,
number theory
,
strings
1000
x31702
1473A
Replacing Elements
greedy
,
implementation
,
math
,
sortings
800
x33982
1472D
Even-Odd Game
dp
,
games
,
greedy
,
sortings
1200
x27675
1472C
Long Jumps
dp
,
graphs
1100
x31617
1472B
Fair Division
dp
,
greedy
,
math
800
x51099
1472A
Cards for Friends
greedy
,
math
800
x42167
1471B
Strange List
brute force
,
greedy
,
implementation
,
math
1100
x19386
1471A
Strange Partition
greedy
,
math
,
number theory
900
x26618
1469B
Red and Blue
dp
,
greedy
1000
x27553
1469A
Regular Bracket Sequence
constructive algorithms
,
greedy
1000
x27596
1468N
Waste Sorting
greedy
,
implementation
900
x8253
1468E
Four Segments
greedy
800
x8867
1467A
Wizard of Orz
constructive algorithms
,
greedy
,
math
900
x24392
1466B
Last minute enhancements
dp
,
greedy
800
x22723
1466A
Bovine Dilemma
brute force
,
geometry
,
math
800
x22595
1463A
Dungeon
binary search
,
math
1100
x25703
1462C
Unique Number
brute force
,
greedy
,
math
900
x32820
1462B
Last Year's Substring
dp
,
implementation
,
strings
800
x27333
1462A
Favorite Sequence
implementation
,
two pointers
800
x42224
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