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Contest is running
Kotlin Heroes: Practice 6
05:07:12
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Before contest
Kotlin Heroes: Episode 6
06:07:12
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Difficulty:
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constructive algorithms
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
1493E
Enormous XOR
bitmasks
,
constructive algorithms
,
greedy
,
implementation
,
strings
,
two pointers
2600
x312
1493C
K-beautiful Strings
binary search
,
brute force
,
constructive algorithms
,
greedy
,
strings
2000
x2218
1493A
Anti-knapsack
constructive algorithms
,
greedy
800
x11963
1494F
Delete The Edges
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
implementation
2900
x155
1494E
A-Z Graph
constructive algorithms
,
data structures
,
graphs
,
hashing
2400
x893
1494D
Dogeforces
constructive algorithms
,
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
greedy
,
sortings
,
trees
2300
x1413
1491G
Switch and Flip
constructive algorithms
,
graphs
,
math
2800
x314
1491F
Magnets
binary search
,
constructive algorithms
,
interactive
2700
x508
1491D
Zookeeper and The Infinite Zoo
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
math
1800
x4011
1492E
Almost Fault-Tolerant Database
brute force
,
constructive algorithms
,
dfs and similar
,
greedy
,
implementation
2500
x774
1492D
Genius's Gambit
bitmasks
,
constructive algorithms
,
greedy
,
math
1900
x3850
1490B
Balanced Remainders
brute force
,
constructive algorithms
,
math
1000
x14713
1486E
Paired Payment
binary search
,
brute force
,
constructive algorithms
,
dp
,
flows
,
graphs
,
shortest paths
2200
x1668
1487C
Minimum Ties
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
1500
x7503
1485D
Multiples and Power Differences
constructive algorithms
,
graphs
,
math
,
number theory
2200
x3152
1479C
Continuous City
bitmasks
,
constructive algorithms
2500
x819
1479B2
Painting the Array II
constructive algorithms
,
data structures
,
dp
,
greedy
,
implementation
2100
x2514
1479B1
Painting the Array I
constructive algorithms
,
data structures
,
dp
,
greedy
,
implementation
1900
x4479
1481D
AB Graph
brute force
,
constructive algorithms
,
graphs
,
greedy
,
implementation
2000
x3039
1481C
Fence Painting
brute force
,
constructive algorithms
,
greedy
1600
x7139
1476A
K-divisible Sum
binary search
,
constructive algorithms
,
greedy
,
math
1000
x16738
1477D
Nezzar and Hidden Permutations
constructive algorithms
,
dfs and similar
,
graphs
2800
x259
1477C
Nezzar and Nice Beatmap
constructive algorithms
,
geometry
,
greedy
,
math
,
sortings
2200
x1484
1477A
Nezzar and Board
constructive algorithms
,
math
,
number theory
1800
x3752
1475F
Unusual Matrix
2-sat
,
brute force
,
constructive algorithms
1900
x3249
1474E
What Is It?
constructive algorithms
,
greedy
2500
x905
1474C
Array Destruction
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
,
sortings
1700
x7627
1474B
Different Divisors
binary search
,
constructive algorithms
,
greedy
,
math
,
number theory
1000
x15549
1473C
No More Inversions
constructive algorithms
,
math
1500
x8722
1467C
Three Bags
constructive algorithms
,
greedy
1900
x4367
1467A
Wizard of Orz
constructive algorithms
,
greedy
,
math
900
x17329
1470D
Strange Housing
constructive algorithms
,
dfs and similar
,
graph matchings
,
graphs
,
greedy
2200
x2214
1470C
Strange Shuffle
binary search
,
brute force
,
constructive algorithms
,
interactive
2500
x905
1469D
Ceil Divisions
brute force
,
constructive algorithms
,
math
,
number theory
1700
x6210
1469A
Regular Bracket Sequence
constructive algorithms
,
greedy
1000
x16881
1468H
K and Medians
constructive algorithms
,
greedy
,
math
2200
x1114
1463E
Plan of Lectures
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
2400
x923
1463D
Pairs
binary search
,
constructive algorithms
,
greedy
,
two pointers
1900
x2895
1463B
Find The Array
bitmasks
,
constructive algorithms
,
greedy
1400
x10405
1461F
Mathematical Expression
constructive algorithms
,
dp
,
greedy
2700
x315
1461A
String Generation
constructive algorithms
,
greedy
800
x15082
1450E
Capitalism
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
2700
x547
1450F
The Struggling Contestant
constructive algorithms
,
greedy
2400
x934
1450C2
Errich-Tac-Toe (Hard Version)
constructive algorithms
,
math
2300
x2331
1450C1
Errich-Tac-Toe (Easy Version)
constructive algorithms
,
math
2100
x3943
1450A
Avoid Trygub
constructive algorithms
,
sortings
800
x14034
1453D
Checkpoints
brute force
,
constructive algorithms
,
greedy
,
math
,
probabilities
1900
x3085
1453B
Suffix Operations
constructive algorithms
,
implementation
1400
x8798
1455E
Four Points
brute force
,
constructive algorithms
,
flows
,
geometry
,
greedy
,
implementation
,
math
,
ternary search
2400
x1021
1455C
Ping-pong
constructive algorithms
,
games
,
math
1100
x13937
1455B
Jumps
constructive algorithms
,
math
1200
x13773
1415E
New Game Plus!
constructive algorithms
,
greedy
,
math
2200
x1661
1415D
XOR-gun
bitmasks
,
brute force
,
constructive algorithms
2000
x3261
1454D
Number into Sequence
constructive algorithms
,
math
,
number theory
1300
x11800
1454A
Special Permutation
constructive algorithms
,
probabilities
800
x24032
1451E1
Bitwise Queries (Easy Version)
bitmasks
,
constructive algorithms
,
interactive
,
math
2000
x2823
1451F
Nullify The Matrix
constructive algorithms
,
games
2700
x522
1451E2
Bitwise Queries (Hard Version)
bitmasks
,
constructive algorithms
,
interactive
,
math
2300
x1854
1452F
Divide Powers
constructive algorithms
,
greedy
2900
x162
1439B
Graph Subset Problem
constructive algorithms
,
data structures
,
graphs
2600
x884
1439A2
Binary Table (Hard Version)
constructive algorithms
,
graphs
,
greedy
,
implementation
1900
x3655
1439A1
Binary Table (Easy Version)
constructive algorithms
,
implementation
1500
x6725
1447A
Add Candies
constructive algorithms
,
math
800
x11085
1446E
Long Recovery
constructive algorithms
,
dfs and similar
3500
x39
1446A
Knapsack
constructive algorithms
,
greedy
,
sortings
1300
x9288
1438E
Yurii Can Do Everything
binary search
,
bitmasks
,
brute force
,
constructive algorithms
,
divide and conquer
,
two pointers
2500
x791
1438D
Powerful Ksenia
bitmasks
,
constructive algorithms
,
math
2200
x2703
1438C
Engineer Artem
2-sat
,
chinese remainder theorem
,
constructive algorithms
,
fft
,
flows
2000
x6675
1438B
Valerii Against Everyone
constructive algorithms
,
data structures
,
greedy
,
sortings
1000
x12165
1438A
Specific Tastes of Andre
constructive algorithms
,
implementation
800
x15177
1442E
Black, White and Grey Tree
binary search
,
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
3000
x213
1442A
Extreme Subtraction
constructive algorithms
,
dp
,
greedy
1800
x5735
1443A
Kids Seating
constructive algorithms
,
math
800
x13504
1444D
Rectangular Polyline
constructive algorithms
,
dp
,
geometry
2900
x247
1437E
Make It Increasing
binary search
,
constructive algorithms
,
data structures
,
dp
,
implementation
2200
x2313
1437B
Reverse Binary Strings
constructive algorithms
,
greedy
1200
x12608
1437A
Marketing Scheme
brute force
,
constructive algorithms
,
greedy
,
math
800
x15056
1413A
Finding Sasuke
constructive algorithms
,
math
800
x12109
1436B
Prime Square
constructive algorithms
,
math
900
x14492
1433D
Districts Connection
constructive algorithms
,
dfs and similar
1200
x13414
1433C
Dominant Piranha
constructive algorithms
,
greedy
900
x17882
1421D
Hexagons
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
,
shortest paths
1900
x3255
1421C
Palindromifier
constructive algorithms
,
strings
1400
x8411
1421B
Putting Bricks in the Wall
constructive algorithms
,
implementation
1100
x10250
1428D
Bouncing Boomerangs
constructive algorithms
,
greedy
,
implementation
1900
x3439
1430C
Numbers on Whiteboard
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
1000
x13070
1430A
Number of Apartments
brute force
,
constructive algorithms
,
math
900
x14922
1427E
Xum
bitmasks
,
constructive algorithms
,
math
,
matrices
,
number theory
2500
x787
1427D
Unshuffling a Deck
constructive algorithms
,
implementation
2000
x2642
1423J
Bubble Cup hypothesis
bitmasks
,
constructive algorithms
,
dp
,
math
2400
x491
1408F
Two Different
constructive algorithms
,
divide and conquer
2300
x1660
1408B
Arrays Sum
constructive algorithms
,
greedy
,
math
1400
x6883
1408A
Circle Coloring
constructive algorithms
800
x10961
1426E
Rock, Paper, Scissors
brute force
,
constructive algorithms
,
flows
,
greedy
,
math
1800
x5050
1426D
Non-zero Segments
constructive algorithms
,
data structures
,
greedy
,
sortings
1500
x9043
1426C
Increase and Copy
binary search
,
constructive algorithms
,
math
1100
x13008
1416B
Make Them Equal
constructive algorithms
,
greedy
,
math
2000
x4030
1425H
Huge Boxes of Animal Toys
constructive algorithms
1300
x2584
1420C1
Pokémon Army (easy version)
constructive algorithms
,
dp
,
greedy
1300
x11169
1419E
Decryption
constructive algorithms
,
implementation
,
math
,
number theory
2100
x2438
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