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Codeforces Round 940 (Div. 2) and CodeCraft-23
44:54:44
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combinatorics
combine-tags-by-or
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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
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probabilities
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shortest paths
sortings
string suffix structures
strings
ternary search
trees
two pointers
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Problems
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Name
1861E
Non-Intersecting Subpermutations
combinatorics
,
dp
,
implementation
,
math
2300
x1595
1917D
Yet Another Inversions Problem
combinatorics
,
data structures
,
dp
,
implementation
,
math
,
number theory
2300
x1634
1245F
Daniel and Spring Cleaning
bitmasks
,
brute force
,
combinatorics
,
dp
2300
x1715
1768E
Partial Sorting
combinatorics
,
math
,
number theory
2300
x1764
1550D
Excellent Arrays
binary search
,
combinatorics
,
constructive algorithms
,
implementation
,
math
,
sortings
,
two pointers
2300
x1778
570E
Pig and Palindromes
combinatorics
,
dp
2300
x1798
960E
Alternating Tree
combinatorics
,
dfs and similar
,
divide and conquer
,
dp
,
probabilities
,
trees
2300
x1804
1292C
Xenon's Attack on the Gangs
combinatorics
,
dfs and similar
,
dp
,
greedy
,
trees
2300
x1859
1705E
Mark and Professor Koro
binary search
,
bitmasks
,
brute force
,
combinatorics
,
data structures
,
greedy
2300
x1968
1712E1
LCM Sum (easy version)
binary search
,
brute force
,
combinatorics
,
math
,
number theory
,
two pointers
2300
x2031
1371E2
Asterism (Hard Version)
binary search
,
combinatorics
,
dp
,
math
,
number theory
,
sortings
2300
x2290
1536E
Omkar and Forest
combinatorics
,
graphs
,
math
,
shortest paths
2300
x2332
1073E
Segment Sum
bitmasks
,
combinatorics
,
dp
,
math
2300
x2372
1824B2
LuoTianyi and the Floating Islands (Hard Version)
combinatorics
,
dfs and similar
,
math
,
probabilities
,
trees
2300
x2465
1228E
Another Filling the Grid
combinatorics
,
dp
,
math
2300
x2473
1540B
Tree Array
brute force
,
combinatorics
,
dp
,
graphs
,
math
,
probabilities
,
trees
2300
x2480
785D
Anton and School - 2
combinatorics
,
dp
,
math
,
number theory
2300
x2630
547C
Mike and Foam
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
2300
x2692
1342E
Placing Rooks
combinatorics
,
fft
,
math
2300
x2801
451E
Devu and Flowers
bitmasks
,
combinatorics
,
number theory
2300
x3207
305D
Olya and Graph
combinatorics
,
math
2200
x452
852F
Product transformation
combinatorics
,
math
,
number theory
2200
x541
1906H
Twin Friends
combinatorics
,
dp
2200
x596
28C
Bath Queue
combinatorics
,
dp
,
probabilities
2200
x978
1666F
Fancy Stack
combinatorics
,
dp
,
implementation
2200
x1099
272E
Dima and Horses
combinatorics
,
constructive algorithms
,
graphs
2200
x1169
1808E1
Minibuses on Venus (easy version)
combinatorics
,
divide and conquer
,
dp
2200
x1239
815B
Karen and Test
brute force
,
combinatorics
,
constructive algorithms
,
math
2200
x1359
612E
Square Root of Permutation
combinatorics
,
constructive algorithms
,
dfs and similar
,
graphs
,
math
2200
x1575
1811G2
Vlad and the Nice Paths (hard version)
binary search
,
combinatorics
,
data structures
,
dp
,
math
,
two pointers
2200
x1597
1909F1
Small Permutation Problem (Easy Version)
brute force
,
combinatorics
,
dp
,
math
2200
x1605
712D
Memory and Scores
combinatorics
,
dp
,
math
2200
x1609
920G
List Of Integers
binary search
,
bitmasks
,
brute force
,
combinatorics
,
math
,
number theory
2200
x1668
1551F
Equidistant Vertices
brute force
,
combinatorics
,
dfs and similar
,
dp
,
trees
2200
x1736
520E
Pluses everywhere
combinatorics
,
dp
,
math
,
number theory
2200
x1790
1140E
Palindrome-less Arrays
combinatorics
,
divide and conquer
,
dp
2200
x1880
1178F1
Short Colorful Strip
combinatorics
,
dfs and similar
,
dp
2200
x1896
1763D
Valid Bitonic Permutations
combinatorics
,
dp
,
implementation
,
math
,
number theory
2200
x1944
1946E
Girl Permutation
combinatorics
,
dp
,
math
,
number theory
2200
x1958
875D
High Cry
binary search
,
bitmasks
,
combinatorics
,
data structures
,
divide and conquer
2200
x1965
1657E
Star MST
combinatorics
,
dp
,
graph matchings
,
math
2200
x1977
1832E
Combinatorics Problem
brute force
,
combinatorics
,
dp
2200
x2046
1837E
Playoff Fixing
combinatorics
,
trees
2200
x2079
1559E
Mocha and Stars
combinatorics
,
dp
,
fft
,
math
,
number theory
2200
x2210
1542D
Priority Queue
combinatorics
,
dp
,
implementation
,
math
,
ternary search
2200
x2524
1334E
Divisor Paths
combinatorics
,
graphs
,
greedy
,
math
,
number theory
2200
x2587
839D
Winter is here
combinatorics
,
dp
,
math
,
number theory
2200
x2678
1515E
Phoenix and Computers
combinatorics
,
dp
,
math
2200
x3344
1467D
Sum of Paths
combinatorics
,
dp
,
math
2200
x3532
559C
Gerald and Giant Chess
combinatorics
,
dp
,
math
,
number theory
2200
x6122
212C
Cowboys
combinatorics
,
dp
,
math
2100
x375
306C
White, Black and White Again
combinatorics
,
number theory
2100
x434
215E
Periodical Numbers
combinatorics
,
dp
,
number theory
2100
x536
1906J
Count BFS Graph
combinatorics
,
dp
2100
x617
1912B
Blueprint for Seating
combinatorics
,
divide and conquer
,
math
2100
x898
336D
Vasily the Bear and Beautiful Strings
combinatorics
,
math
,
number theory
2100
x929
895D
String Mark
combinatorics
,
math
,
strings
2100
x1084
356C
Compartments
combinatorics
,
constructive algorithms
,
greedy
,
implementation
2100
x1226
452C
Magic Trick
combinatorics
,
math
,
probabilities
2100
x1395
439E
Devu and Birthday Celebration
combinatorics
,
dp
,
math
2100
x1471
1866H
Happy Sets
combinatorics
2100
x1513
489F
Special Matrices
combinatorics
,
dp
2100
x1594
859E
Desk Disorder
combinatorics
,
dfs and similar
,
dsu
,
graphs
,
trees
2100
x1637
1914G1
Light Bulbs (Easy Version)
brute force
,
combinatorics
,
dfs and similar
,
dp
,
dsu
,
graphs
,
math
,
trees
2100
x1639
295C
Greg and Friends
combinatorics
,
dp
,
graphs
,
shortest paths
2100
x1653
1028D
Order book
combinatorics
,
data structures
,
greedy
2100
x1707
551D
GukiZ and Binary Operations
combinatorics
,
implementation
,
math
,
matrices
,
number theory
2100
x1721
1267K
Key Storage
combinatorics
,
math
2100
x1736
1027E
Inverse Coloring
combinatorics
,
dp
,
math
2100
x1856
145C
Lucky Subsequence
combinatorics
,
dp
,
math
2100
x1879
1811G1
Vlad and the Nice Paths (easy version)
combinatorics
,
dp
,
math
2100
x1893
1525E
Assimilation IV
combinatorics
,
dp
,
math
,
probabilities
,
two pointers
2100
x1930
1776G
Another Wine Tasting Event
combinatorics
,
constructive algorithms
,
math
,
strings
2100
x1938
571A
Lengthening Sticks
combinatorics
,
implementation
,
math
2100
x2004
1729G
Cut Substrings
combinatorics
,
dp
,
hashing
,
strings
,
two pointers
2100
x2042
431D
Random Task
binary search
,
bitmasks
,
combinatorics
,
dp
,
math
2100
x2102
414C
Mashmokh and Reverse Operation
combinatorics
,
divide and conquer
2100
x2163
1598E
Staircases
brute force
,
combinatorics
,
data structures
,
dfs and similar
,
dp
,
implementation
,
math
2100
x2224
788B
Weird journey
combinatorics
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2100
x2276
1920E
Counting Binary Strings
combinatorics
,
dp
,
math
2100
x2311
1761D
Carry Bit
combinatorics
,
math
2100
x2314
1167E
Range Deleting
binary search
,
combinatorics
,
data structures
,
two pointers
2100
x2385
1511E
Colorings and Dominoes
combinatorics
,
dp
,
greedy
,
math
2100
x2443
1778D
Flexible String Revisit
combinatorics
,
dp
,
math
,
probabilities
2100
x2524
1185G1
Playlist for Polycarp (easy version)
bitmasks
,
combinatorics
,
dp
2100
x2547
1671E
Preorder
combinatorics
,
divide and conquer
,
dp
,
dsu
,
hashing
,
sortings
,
trees
2100
x2635
1748D
ConstructOR
bitmasks
,
chinese remainder theorem
,
combinatorics
,
constructive algorithms
,
math
,
number theory
2100
x2645
466D
Increase Sequence
combinatorics
,
dp
2100
x2827
1628D1
Game on Sum (Easy Version)
combinatorics
,
dp
,
games
,
math
2100
x3004
1151E
Number of Components
combinatorics
,
data structures
,
dp
,
math
2100
x3020
1271E
Common Number
binary search
,
combinatorics
,
dp
,
math
2100
x3104
1553E
Permutation Shift
brute force
,
combinatorics
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
math
2100
x3227
1886D
Monocarp and the Set
combinatorics
,
data structures
,
math
2100
x3288
1606E
Arena
combinatorics
,
dp
,
math
2100
x3321
1332E
Height All the Same
combinatorics
,
constructive algorithms
,
math
,
matrices
2100
x3549
1366E
Two Arrays
binary search
,
brute force
,
combinatorics
,
constructive algorithms
,
dp
,
two pointers
2100
x3948
176C
Playing with Superglue
combinatorics
,
constructive algorithms
2000
x460
26C
Parquet
combinatorics
,
constructive algorithms
,
greedy
,
implementation
2000
x819
1725C
Circular Mirror
binary search
,
combinatorics
,
geometry
,
math
,
two pointers
2000
x1529
1599C
Bubble Strike
combinatorics
,
math
,
probabilities
,
ternary search
2000
x1546
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