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CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!)
25:41:46
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Difficulty:
—
greedy
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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Problems
#
Name
1617A
Forbidden Subsequence
constructive algorithms
,
greedy
,
sortings
,
strings
800
x16056
1616E
Lexicographically Small Enough
brute force
,
data structures
,
greedy
,
strings
2200
x2357
1616D
Keep the Average High
dp
,
greedy
,
math
2000
x4663
1616B
Mirror in the String
greedy
,
strings
1100
x18951
1615E
Purple Crayon
data structures
,
dfs and similar
,
games
,
graphs
,
greedy
,
math
,
sortings
,
trees
2400
x1376
1615C
Menorah
brute force
,
graphs
,
greedy
,
math
1600
x7981
1615B
And It's Non-Zero
bitmasks
,
greedy
,
math
1300
x15016
1615A
Closing The Gap
greedy
,
math
800
x20404
1614A
Divan and a Store
brute force
,
constructive algorithms
,
greedy
800
x22979
1613B
Absent Remainder
greedy
,
implementation
,
sortings
1000
x21041
1612G
Max Sum Array
combinatorics
,
constructive algorithms
,
greedy
,
sortings
2500
x808
1612F
Armor and Weapons
brute force
,
dp
,
greedy
,
shortest paths
2800
x552
1612E
Messages
brute force
,
dp
,
greedy
,
probabilities
,
sortings
2000
x2364
1612B
Special Permutation
constructive algorithms
,
greedy
900
x16792
1611G
Robot and Candies
data structures
,
graph matchings
,
greedy
2500
x599
1611E2
Escape The Maze (hard version)
dfs and similar
,
dp
,
greedy
,
shortest paths
,
trees
1900
x3591
1611E1
Escape The Maze (easy version)
dfs and similar
,
greedy
,
shortest paths
,
trees
,
two pointers
1700
x6806
1610H
Squid Game
data structures
,
dfs and similar
,
greedy
,
trees
3100
x390
1610G
AmShZ Wins a Bet
data structures
,
greedy
,
hashing
3300
x315
1610E
AmShZ and G.O.A.T.
binary search
,
brute force
,
greedy
,
implementation
,
math
2300
x1617
1610C
Keshi Is Throwing a Party
binary search
,
greedy
1600
x10479
1610B
Kalindrome Array
greedy
,
two pointers
1100
x14460
1609G
A Stroll Around the Matrix
data structures
,
greedy
,
math
3000
x356
1609D
Social Network
dsu
,
graphs
,
greedy
,
implementation
,
trees
1600
x6844
1609A
Divide and Multiply
greedy
,
implementation
,
math
,
number theory
900
x16557
1608C
Game Master
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
two pointers
1700
x6340
1608B
Build the Permutation
constructive algorithms
,
greedy
1200
x11356
1607H
Banquet Preparations 2
greedy
,
sortings
,
two pointers
2200
x1174
1607G
Banquet Preparations 1
greedy
2200
x1498
1607D
Blue-Red Permutation
greedy
,
math
,
sortings
1300
x16147
1606C
Banknotes
greedy
,
number theory
1400
x13608
1606B
Update Files
greedy
,
implementation
,
math
1100
x18085
1605E
Array Equalizer
binary search
,
greedy
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2400
x983
1605D
Treelabeling
bitmasks
,
constructive algorithms
,
dfs and similar
,
games
,
greedy
,
implementation
,
trees
2100
x2819
1605C
Dominant Character
brute force
,
greedy
,
implementation
,
strings
1400
x16145
1605B
Reverse Sort
greedy
,
sortings
1000
x17503
1604A
Era
greedy
800
x20989
1603C
Extreme Extension
dp
,
greedy
,
math
,
number theory
2300
x1960
1601E
Phys Ed Online
data structures
,
dp
,
greedy
2900
x459
1601D
Difficult Mountain
data structures
,
dp
,
greedy
,
sortings
2700
x1354
1601C
Optimal Insertion
data structures
,
divide and conquer
,
dp
,
greedy
,
sortings
2300
x1898
1601A
Array Elimination
bitmasks
,
greedy
,
math
,
number theory
1300
x12871
1600E
Array Game
games
,
greedy
,
two pointers
1900
x1895
1599J
Bob's Beautiful Array
bitmasks
,
brute force
,
greedy
2600
x281
1599A
Weights
constructive algorithms
,
greedy
,
two pointers
2600
x628
1594C
Make Them Equal
brute force
,
greedy
,
math
,
strings
1200
x17504
1593G
Changing Brackets
constructive algorithms
,
data structures
,
dp
,
greedy
2200
x1602
1593E
Gardener and Tree
brute force
,
data structures
,
dfs and similar
,
greedy
,
implementation
,
trees
1600
x11475
1593C
Save More Mice
binary search
,
greedy
,
greedy
1000
x23620
1593B
Make it Divisible by 25
dfs and similar
,
dp
,
greedy
,
math
,
math
900
x24647
1592F2
Alice and Recoloring 2
constructive algorithms
,
flows
,
graph matchings
,
greedy
2800
x650
1592F1
Alice and Recoloring 1
constructive algorithms
,
greedy
2600
x753
1592E
Bored Bakry
bitmasks
,
greedy
,
math
,
two pointers
2400
x1530
1592A
Gamer Hemose
binary search
,
greedy
,
math
,
sortings
800
x21372
1585C
Minimize Distance
greedy
1300
x11425
1585B
Array Eversion
greedy
900
x14742
1584F
Strange LCS
bitmasks
,
dp
,
graphs
,
greedy
,
strings
2600
x827
1584E
Game with Stones
binary search
,
data structures
,
games
,
greedy
2300
x1205
1584C
Two Arrays
greedy
,
math
,
sortings
900
x15765
1584B
Coloring Rectangles
greedy
,
math
1000
x13010
1583E
Moment of Bloom
constructive algorithms
,
dfs and similar
,
graph matchings
,
graphs
,
greedy
,
trees
2200
x2150
1583D
Omkar and the Meaning of Life
constructive algorithms
,
greedy
,
interactive
1800
x5197
1582F2
Korney Korneevich and XOR (hard version)
binary search
,
brute force
,
dp
,
greedy
,
two pointers
2400
x1691
1582F1
Korney Korneevich and XOR (easy version)
bitmasks
,
dp
,
greedy
1800
x5157
1582E
Pchelyonok and Segments
binary search
,
data structures
,
dp
,
greedy
,
math
2000
x3551
1582C
Grandma Capa Knits a Scarf
brute force
,
data structures
,
greedy
,
strings
,
two pointers
1200
x14035
1581B
Diameter of Graph
constructive algorithms
,
graphs
,
greedy
,
math
1200
x10960
1580D
Subsequence
brute force
,
divide and conquer
,
dp
,
greedy
,
trees
2900
x745
1580A
Portal
brute force
,
data structures
,
dp
,
greedy
,
implementation
1700
x3519
1579E2
Array Optimization by Deque
data structures
,
greedy
1700
x6280
1579E1
Permutation Minimization by Deque
constructive algorithms
,
greedy
,
math
1000
x20683
1579D
Productive Meeting
constructive algorithms
,
graphs
,
greedy
1400
x15095
1579C
Ticks
greedy
,
implementation
1500
x10197
1578L
Labyrinth
binary search
,
dsu
,
greedy
2400
x1046
1574D
The Strongest Build
binary search
,
brute force
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
hashing
,
implementation
2000
x4304
1574C
Slay the Dragon
binary search
,
greedy
,
sortings
,
ternary search
1300
x16359
1574B
Combinatorics Homework
combinatorics
,
greedy
,
math
1100
x16905
1573B
Swaps
greedy
,
math
,
sortings
1400
x14103
1573A
Countdown
greedy
800
x20894
1572D
Bridge Club
flows
,
graph matchings
,
graphs
,
greedy
2800
x456
1572C
Paint
dp
,
greedy
2700
x1378
1572B
Xor of 3
brute force
,
constructive algorithms
,
greedy
,
two pointers
2500
x1727
1571E
Fix the String
*special problem
,
bitmasks
,
dp
,
greedy
1700
x318
1567D
Expression Evaluation Error
constructive algorithms
,
greedy
,
implementation
,
math
2000
x4369
1567B
MEXor Mixup
bitmasks
,
greedy
1000
x21063
1566G
Four Vertices
constructive algorithms
,
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
3100
x323
1566F
Points Movement
data structures
,
dp
,
greedy
,
implementation
,
sortings
2600
x918
1566E
Buds Re-hanging
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
2000
x3985
1566D2
Seating Arrangements (hard version)
data structures
,
greedy
,
implementation
,
sortings
,
two pointers
1600
x7656
1566D1
Seating Arrangements (easy version)
data structures
,
greedy
,
sortings
1100
x13673
1566C
MAX-MEX Cut
bitmasks
,
constructive algorithms
,
dp
,
greedy
1000
x16858
1566B
MIN-MEX Cut
bitmasks
,
constructive algorithms
,
dp
,
greedy
800
x18926
1566A
Median Maximization
binary search
,
greedy
,
math
800
x22559
1562E
Rescue Niwen!
dp
,
greedy
,
string suffix structures
,
strings
2500
x1317
1562A
The Miracle and the Sleeper
greedy
,
math
800
x25137
1561C
Deep Down Below
binary search
,
greedy
,
sortings
1300
x13212
1560F2
Nearest Beautiful Number (hard version)
bitmasks
,
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
greedy
2100
x4166
1560F1
Nearest Beautiful Number (easy version)
binary search
,
bitmasks
,
brute force
,
constructive algorithms
,
dfs and similar
,
greedy
1900
x5858
1560D
Make a Power of Two
greedy
,
math
,
strings
1300
x17511
1559D2
Mocha and Diana (Hard Version)
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
trees
,
two pointers
2500
x2506
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