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CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!)
23:46:18
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Difficulty:
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brute force
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
1834F
Typewriter
brute force
,
math
2500
x478
912C
Perun, Ult!
brute force
,
greedy
,
sortings
2500
x505
1709F
Multiset of Strings
bitmasks
,
brute force
,
dp
,
fft
,
flows
,
graphs
,
math
,
meet-in-the-middle
,
trees
2500
x520
1946F
Nobody is needed
brute force
,
data structures
,
dp
,
math
2500
x532
1731F
Function Sum
brute force
,
combinatorics
,
dp
,
fft
,
math
2500
x648
1771E
Hossam and a Letter
brute force
,
dp
,
implementation
,
two pointers
2500
x652
1789E
Serval and Music Game
brute force
,
dp
,
implementation
,
math
,
number theory
2500
x751
1891E
Brukhovich and Exams
brute force
,
greedy
,
implementation
,
math
,
sortings
2500
x762
1017F
The Neutral Zone
brute force
,
math
2500
x791
1814D
Balancing Weapons
binary search
,
brute force
,
data structures
,
math
,
two pointers
2500
x811
1767E
Algebra Flash
bitmasks
,
brute force
,
dp
,
graphs
,
math
,
meet-in-the-middle
,
trees
2500
x815
778C
Peterson Polyglot
brute force
,
dfs and similar
,
dsu
,
hashing
,
strings
,
trees
2500
x844
1920F1
Smooth Sailing (Easy Version)
binary search
,
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
shortest paths
2500
x845
687D
Dividing Kingdom II
brute force
,
data structures
,
dsu
,
graphs
,
sortings
2500
x848
1764F
Doremy's Experimental Tree
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
sortings
,
trees
2500
x865
1835B
Lottery
binary search
,
brute force
,
greedy
,
math
,
two pointers
2500
x882
1661E
Narrow Components
brute force
,
data structures
,
dp
,
dsu
,
math
,
trees
2500
x903
407C
Curious Array
brute force
,
combinatorics
,
implementation
,
math
2500
x946
1625E1
Cats on the Upgrade (easy version)
brute force
,
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
graphs
,
trees
2500
x969
1701E
Text Editor
brute force
,
dp
,
greedy
,
strings
2500
x1049
333E
Summer Earnings
binary search
,
bitmasks
,
brute force
,
geometry
,
sortings
2500
x1063
1689E
ANDfinity
bitmasks
,
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2500
x1129
1492E
Almost Fault-Tolerant Database
brute force
,
constructive algorithms
,
dfs and similar
,
greedy
,
implementation
2500
x1156
1712E2
LCM Sum (hard version)
brute force
,
data structures
,
math
,
number theory
,
two pointers
2500
x1173
1823E
Removing Graph
brute force
,
dp
,
games
,
graphs
,
math
2500
x1178
1513F
Swapping Problem
brute force
,
constructive algorithms
,
data structures
,
sortings
2500
x1182
1858E1
Rollbacks (Easy Version)
brute force
,
data structures
,
dfs and similar
,
trees
2500
x1227
804D
Expected diameter of a tree
binary search
,
brute force
,
dfs and similar
,
dp
,
sortings
,
trees
2500
x1248
757E
Bash Plays with Functions
brute force
,
combinatorics
,
dp
,
number theory
2500
x1254
1710C
XOR Triangle
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
greedy
,
math
2500
x1263
1438E
Yurii Can Do Everything
binary search
,
bitmasks
,
brute force
,
constructive algorithms
,
divide and conquer
,
two pointers
2500
x1282
1470C
Strange Shuffle
binary search
,
brute force
,
constructive algorithms
,
interactive
2500
x1291
1687C
Sanae and Giant Robot
binary search
,
brute force
,
data structures
,
dsu
,
greedy
,
sortings
2500
x1325
1665E
MinimizOR
bitmasks
,
brute force
,
data structures
,
divide and conquer
,
greedy
,
implementation
,
two pointers
2500
x1398
1508C
Complete the MST
bitmasks
,
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
trees
2500
x1405
1550E
Stringforces
binary search
,
bitmasks
,
brute force
,
dp
,
strings
,
two pointers
2500
x1431
1452E
Two Editorials
brute force
,
dp
,
greedy
,
sortings
,
two pointers
2500
x1476
1175F
The Number of Subpermutations
brute force
,
data structures
,
divide and conquer
,
hashing
,
math
2500
x1505
1859E
Maximum Monogonosity
brute force
,
dp
,
math
2500
x1637
1572B
Xor of 3
brute force
,
constructive algorithms
,
greedy
,
two pointers
2500
x1727
528D
Fuzzy Search
bitmasks
,
brute force
,
fft
2500
x2028
348C
Subset Sums
brute force
,
data structures
2500
x2028
1559D2
Mocha and Diana (Hard Version)
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
trees
,
two pointers
2500
x2506
97A
Domino
brute force
,
implementation
2400
x248
175D
Plane of Tanks: Duel
brute force
,
dp
,
math
,
probabilities
2400
x288
335D
Rectangles and Square
brute force
,
dp
2400
x303
293C
Cube Problem
brute force
,
math
,
number theory
2400
x548
1765L
Project Manager
brute force
,
data structures
,
implementation
2400
x552
758F
Geometrical Progression
brute force
,
math
,
number theory
2400
x610
1163E
Magical Permutation
bitmasks
,
brute force
,
constructive algorithms
,
data structures
,
graphs
,
math
2400
x636
1866L
Lihmuf Balling
binary search
,
brute force
,
math
2400
x644
200A
Cinema
brute force
,
data structures
2400
x649
1866M
Mighty Rock Tower
brute force
,
combinatorics
,
dp
,
math
,
probabilities
2400
x660
837F
Prefix Sums
binary search
,
brute force
,
combinatorics
,
math
,
matrices
2400
x726
303C
Minimum Modular
brute force
,
graphs
,
math
,
number theory
2400
x842
1007B
Pave the Parallelepiped
bitmasks
,
brute force
,
combinatorics
,
math
,
number theory
2400
x917
1882E1
Two Permutations (Easy Version)
brute force
,
constructive algorithms
,
greedy
,
number theory
2400
x930
1038E
Maximum Matching
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
2400
x944
621D
Rat Kwesh and Cheese
brute force
,
constructive algorithms
,
math
2400
x959
756D
Bacterial Melee
brute force
,
combinatorics
,
dp
,
string suffix structures
2400
x967
744C
Hongcow Buys a Deck of Cards
bitmasks
,
brute force
,
dp
2400
x979
1943D1
Counting Is Fun (Easy Version)
brute force
,
combinatorics
,
dp
,
math
2400
x1001
632F
Magic Matrix
brute force
,
divide and conquer
,
graphs
,
matrices
,
trees
2400
x1005
1774F1
Magician and Pigs (Easy Version)
brute force
,
data structures
,
implementation
2400
x1012
1935E
Distance Learning Courses in MAC
bitmasks
,
brute force
,
data structures
,
greedy
,
math
2400
x1019
1874B
Jellyfish and Math
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
shortest paths
2400
x1031
1619H
Permutation and Queries
brute force
,
data structures
,
divide and conquer
,
two pointers
2400
x1045
1680D
Dog Walking
brute force
,
greedy
,
math
2400
x1103
1697E
Coloring
brute force
,
combinatorics
,
constructive algorithms
,
dp
,
geometry
,
graphs
,
greedy
,
implementation
,
math
2400
x1123
1879E
Interactive Game with Coloring
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
implementation
,
interactive
,
trees
2400
x1162
906C
Party
bitmasks
,
brute force
,
dp
,
graphs
2400
x1173
1286C1
Madhouse (Easy version)
brute force
,
constructive algorithms
,
interactive
,
math
2400
x1199
1909E
Multiple Lamps
bitmasks
,
brute force
,
constructive algorithms
,
math
,
number theory
2400
x1201
1443E
Long Permutation
brute force
,
math
,
two pointers
2400
x1215
1343F
Restore the Permutation by Sorted Segments
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x1223
1374F
Cyclic Shifts Sorting
brute force
,
constructive algorithms
,
implementation
,
sortings
2400
x1247
1109D
Sasha and Interesting Fact from Graph Theory
brute force
,
combinatorics
,
dp
,
math
,
trees
2400
x1252
1780E
Josuke and Complete Graph
binary search
,
brute force
,
data structures
,
math
,
number theory
2400
x1286
1792E
Divisors and Table
brute force
,
dfs and similar
,
dp
,
number theory
2400
x1291
1598F
RBS
binary search
,
bitmasks
,
brute force
,
data structures
,
dp
2400
x1317
1732D2
Balance (Hard version)
brute force
,
data structures
,
number theory
2400
x1339
1804E
Routing
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
2400
x1340
1606D
Red-Blue Matrix
brute force
,
constructive algorithms
,
implementation
,
sortings
2400
x1390
1333E
Road to 1600
brute force
,
constructive algorithms
2400
x1400
1455E
Four Points
brute force
,
constructive algorithms
,
flows
,
geometry
,
greedy
,
implementation
,
math
,
ternary search
2400
x1418
1826E
Walk the Runway
bitmasks
,
brute force
,
data structures
,
dp
,
graphs
,
implementation
,
sortings
2400
x1473
1887C
Minimum Array
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
hashing
,
two pointers
2400
x1531
1260E
Tournament
brute force
,
dp
,
greedy
2400
x1595
1706D2
Chopping Carrots (Hard Version)
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
2400
x1639
710F
String Set Queries
brute force
,
data structures
,
hashing
,
interactive
,
string suffix structures
,
strings
2400
x1650
1582F2
Korney Korneevich and XOR (hard version)
binary search
,
brute force
,
dp
,
greedy
,
two pointers
2400
x1691
1761E
Make It Connected
binary search
,
brute force
,
constructive algorithms
,
dsu
,
graphs
,
greedy
,
matrices
,
trees
,
two pointers
2400
x1701
1202E
You Are Given Some Strings...
brute force
,
string suffix structures
,
strings
2400
x1754
1638E
Colorful Operations
brute force
,
data structures
,
implementation
2400
x1768
1469E
A Bit Similar
bitmasks
,
brute force
,
hashing
,
string suffix structures
,
strings
,
two pointers
2400
x1835
1257F
Make Them Similar
bitmasks
,
brute force
,
hashing
,
meet-in-the-middle
2400
x1915
1348E
Phoenix and Berries
brute force
,
dp
,
greedy
,
math
2400
x1968
506D
Mr. Kitayuta's Colorful Graph
brute force
,
dfs and similar
,
dsu
,
graphs
2400
x1995
1491E
Fib-tree
brute force
,
dfs and similar
,
divide and conquer
,
number theory
,
trees
2400
x2007
1523D
Love-Hate
bitmasks
,
brute force
,
dp
,
probabilities
2400
x2060
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