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Codeforces Round 944 (Div. 4)
02:22:19
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bitmasks
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
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shortest paths
sortings
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strings
ternary search
trees
two pointers
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Name
114B
PFAST Inc.
bitmasks
,
brute force
,
graphs
1500
x3531
1146C
Tree Diameter
bitmasks
,
graphs
,
interactive
1700
x3523
1957D
A BIT of an Inequality
bitmasks
,
brute force
,
dp
,
math
1900
x3514
1316E
Team Building
bitmasks
,
dp
,
greedy
,
sortings
2300
x3476
1950G
Shuffling Songs
bitmasks
,
dfs and similar
,
dp
,
graphs
,
hashing
,
implementation
,
strings
1900
x3456
581D
Three Logos
bitmasks
,
brute force
,
constructive algorithms
,
geometry
,
implementation
,
math
1700
x3423
1446C
Xor Tree
binary search
,
bitmasks
,
data structures
,
divide and conquer
,
dp
,
trees
2100
x3392
282E
Sausage Maximization
bitmasks
,
data structures
,
trees
2200
x3356
1854B
Earn or Unlock
bitmasks
,
brute force
,
dp
2200
x3340
1017D
The Wu
bitmasks
,
brute force
,
data structures
1900
x3340
959E
Mahmoud and Ehab and the xor-MST
bitmasks
,
dp
,
graphs
,
implementation
,
math
1900
x3305
8C
Looking for Order
bitmasks
,
dp
2000
x3248
451E
Devu and Flowers
bitmasks
,
combinatorics
,
number theory
2300
x3241
1392E
Omkar and Duck
bitmasks
,
constructive algorithms
,
interactive
,
math
2100
x3237
1777D
Score of a Tree
bitmasks
,
combinatorics
,
dfs and similar
,
dp
,
math
,
probabilities
,
trees
1900
x3215
981D
Bookshelves
bitmasks
,
dp
,
greedy
1900
x3167
1956D
Nene and the Mex Operator
bitmasks
,
brute force
,
constructive algorithms
,
divide and conquer
,
dp
,
greedy
,
implementation
,
math
2000
x3144
1331C
...And after happily lived ever they
*special problem
,
bitmasks
x3134
1934D1
XOR Break --- Solo Version
bitmasks
,
constructive algorithms
,
greedy
2100
x3073
803F
Coprime Subsequences
bitmasks
,
combinatorics
,
number theory
2000
x2990
900D
Unusual Sequences
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
2000
x2989
1338C
Perfect Triples
bitmasks
,
brute force
,
constructive algorithms
,
divide and conquer
,
math
2200
x2984
1030E
Vasya and Good Sequences
bitmasks
,
dp
2000
x2968
1215E
Marbles
bitmasks
,
dp
2200
x2917
792D
Paths in a Complete Binary Tree
bitmasks
,
trees
1900
x2903
1605D
Treelabeling
bitmasks
,
constructive algorithms
,
dfs and similar
,
games
,
greedy
,
implementation
,
trees
2100
x2838
1451E2
Bitwise Queries (Hard Version)
bitmasks
,
constructive algorithms
,
interactive
,
math
2300
x2833
766E
Mahmoud and a xor trip
bitmasks
,
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
math
,
trees
2100
x2821
1466F
Euclid's nightmare
bitmasks
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
,
sortings
2100
x2794
1166E
The LCMs Must be Large
bitmasks
,
brute force
,
constructive algorithms
,
math
,
number theory
2100
x2782
1088D
Ehab and another another xor problem
bitmasks
,
constructive algorithms
,
implementation
,
interactive
2000
x2760
525E
Anya and Cubes
binary search
,
bitmasks
,
brute force
,
dp
,
math
,
meet-in-the-middle
2100
x2749
1238E
Keyboard Purchase
bitmasks
,
dp
2200
x2739
1209E1
Rotate Columns (easy version)
bitmasks
,
brute force
,
dp
,
greedy
,
sortings
2000
x2716
547C
Mike and Foam
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
2300
x2703
817E
Choosing The Commander
bitmasks
,
data structures
,
trees
2000
x2691
1748D
ConstructOR
bitmasks
,
chinese remainder theorem
,
combinatorics
,
constructive algorithms
,
math
,
number theory
2100
x2664
768E
Game of Stones
bitmasks
,
dp
,
games
2100
x2642
707D
Persistent Bookcase
bitmasks
,
data structures
,
dfs and similar
,
implementation
2200
x2598
513B2
Permutations
bitmasks
,
divide and conquer
,
math
1800
x2564
1185G1
Playlist for Polycarp (easy version)
bitmasks
,
combinatorics
,
dp
2100
x2559
1864E
Guess Game
bitmasks
,
data structures
,
games
,
math
,
probabilities
,
sortings
,
strings
,
trees
2100
x2465
1732C2
Sheikh (Hard Version)
binary search
,
bitmasks
,
brute force
,
greedy
,
implementation
,
two pointers
2100
x2458
1709E
XOR Tree
bitmasks
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
trees
2400
x2444
1658D2
388535 (Hard Version)
bitmasks
,
brute force
,
data structures
,
math
2300
x2440
388B
Fox and Minimal path
bitmasks
,
constructive algorithms
,
graphs
,
implementation
,
math
1900
x2433
1073E
Segment Sum
bitmasks
,
combinatorics
,
dp
,
math
2300
x2388
417D
Cunning Gena
bitmasks
,
dp
,
greedy
,
sortings
1900
x2372
1234F
Yet Another Substring Reverse
bitmasks
,
dp
2200
x2367
1930D2
Sum over all Substrings (Hard Version)
bitmasks
,
divide and conquer
,
dp
,
dsu
,
greedy
,
implementation
,
strings
2100
x2363
1168C
And Reachability
bitmasks
,
dp
2200
x2329
1868B2
Candy Party (Hard Version)
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
implementation
,
math
2100
x2273
778B
Bitwise Formula
bitmasks
,
brute force
,
dfs and similar
,
expression parsing
,
implementation
1800
x2257
1476E
Pattern Matching
bitmasks
,
data structures
,
dfs and similar
,
graphs
,
hashing
,
sortings
,
strings
2300
x2240
1870E
Another MEX Problem
bitmasks
,
brute force
,
dp
,
shortest paths
2300
x2210
769D
k-Interesting Pairs Of Integers
*special problem
,
bitmasks
,
brute force
,
meet-in-the-middle
1700
x2210
986C
AND Graph
bitmasks
,
dfs and similar
,
dsu
,
graphs
2500
x2190
1043F
Make It One
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
,
shortest paths
2500
x2187
1787E
The Harmonization of XOR
bitmasks
,
constructive algorithms
,
greedy
,
math
2100
x2178
1208F
Bits And Pieces
bitmasks
,
dfs and similar
,
dp
,
greedy
2600
x2108
431D
Random Task
binary search
,
bitmasks
,
combinatorics
,
dp
,
math
2100
x2104
442A
Borya and Hanabi
bitmasks
,
brute force
,
implementation
1700
x2093
1523D
Love-Hate
bitmasks
,
brute force
,
dp
,
probabilities
2400
x2084
528D
Fuzzy Search
bitmasks
,
brute force
,
fft
2500
x2069
1912K
Kim's Quest
bitmasks
,
combinatorics
,
dp
1800
x2034
981E
Addition on Segments
bitmasks
,
data structures
,
divide and conquer
,
dp
2200
x1998
875D
High Cry
binary search
,
bitmasks
,
combinatorics
,
data structures
,
divide and conquer
2200
x1980
1705E
Mark and Professor Koro
binary search
,
bitmasks
,
brute force
,
combinatorics
,
data structures
,
greedy
2300
x1978
1625D
Binary Spiders
bitmasks
,
data structures
,
implementation
,
math
,
sortings
,
trees
2300
x1968
662C
Binary Table
bitmasks
,
brute force
,
divide and conquer
,
dp
,
fft
,
math
2600
x1941
1257F
Make Them Similar
bitmasks
,
brute force
,
hashing
,
meet-in-the-middle
2400
x1939
959F
Mahmoud and Ehab and yet another xor task
bitmasks
,
dp
,
math
,
matrices
2400
x1939
993B
Open Communication
bitmasks
,
brute force
1900
x1929
1102F
Elongated Matrix
binary search
,
bitmasks
,
brute force
,
dp
,
graphs
2000
x1904
678E
Another Sith Tournament
bitmasks
,
dp
,
math
,
probabilities
2200
x1904
1194E
Count The Rectangles
bitmasks
,
brute force
,
data structures
,
geometry
,
sortings
2200
x1858
1469E
A Bit Similar
bitmasks
,
brute force
,
hashing
,
string suffix structures
,
strings
,
two pointers
2400
x1855
333D
Characteristics of Rectangles
binary search
,
bitmasks
,
brute force
,
implementation
,
sortings
2100
x1848
1209E2
Rotate Columns (hard version)
bitmasks
,
dp
,
greedy
,
sortings
2500
x1847
1609E
William The Oblivious
bitmasks
,
data structures
,
dp
,
matrices
2400
x1841
1615D
X(or)-mas Tree
bitmasks
,
dfs and similar
,
dsu
,
graphs
,
trees
2200
x1839
1622E
Math Test
bitmasks
,
brute force
,
greedy
2200
x1835
1093G
Multidimensional Queries
bitmasks
,
data structures
2300
x1825
1114F
Please, another Queries on Array?
bitmasks
,
data structures
,
divide and conquer
,
math
,
number theory
2400
x1810
1185F
Two Pizzas
bitmasks
,
brute force
2100
x1802
1720D2
Xor-Subsequence (hard version)
bitmasks
,
data structures
,
dp
,
strings
,
trees
2400
x1730
1245F
Daniel and Spring Cleaning
bitmasks
,
brute force
,
combinatorics
,
dp
2300
x1718
744B
Hongcow's Game
bitmasks
,
divide and conquer
,
interactive
1900
x1706
979D
Kuro and GCD and XOR and SUM
binary search
,
bitmasks
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
math
,
number theory
,
strings
,
trees
2200
x1684
920G
List Of Integers
binary search
,
bitmasks
,
brute force
,
combinatorics
,
math
,
number theory
2200
x1680
1670E
Hemose on the Tree
bitmasks
,
constructive algorithms
,
dfs and similar
,
trees
2200
x1671
916B
Jamie and Binary Sequence (changed after round)
bitmasks
,
greedy
,
math
2000
x1671
291C
Network Mask
*special problem
,
bitmasks
,
brute force
,
implementation
1600
x1665
855E
Salazar Slytherin's Locket
bitmasks
,
dp
2200
x1614
1327F
AND Segments
bitmasks
,
combinatorics
,
data structures
,
dp
,
two pointers
2500
x1605
1105E
Helping Hiasat
bitmasks
,
brute force
,
dp
,
meet-in-the-middle
2200
x1590
1789D
Serval and Shift-Shift-Shift
bitmasks
,
brute force
,
constructive algorithms
,
implementation
2200
x1575
1411E
Poman Numbers
bitmasks
,
greedy
,
math
,
strings
2300
x1554
1592E
Bored Bakry
bitmasks
,
greedy
,
math
,
two pointers
2400
x1544
1401F
Reverse and Swap
binary search
,
bitmasks
,
data structures
2400
x1527
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