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Problems
#
Name
1707F
Bugaboo
bitmasks
,
constructive algorithms
,
dp
,
number theory
3500
x144
1450G
Communism
bitmasks
,
dp
,
trees
3500
x233
1292F
Nora's Toy Boxes
bitmasks
,
combinatorics
,
dp
3500
x304
1305G
Kuroni and Antihype
bitmasks
,
brute force
,
dp
,
dsu
,
graphs
3500
x946
1097H
Mateusz and an Infinite Sequence
bitmasks
,
brute force
,
dp
,
strings
3400
x93
865E
Hex Dyslexia
bitmasks
,
brute force
,
dp
,
graphs
3300
x119
1804H
Code Lock
bitmasks
,
dp
3300
x169
1523F
Favorite Game
bitmasks
,
dp
3300
x400
1799H
Tree Cutting
bitmasks
,
dfs and similar
,
dp
3200
x271
1519F
Chests and Keys
bitmasks
,
brute force
,
dfs and similar
,
dp
,
flows
3200
x388
750G
New Year and Binary Tree Paths
bitmasks
,
brute force
,
combinatorics
,
dp
3200
x441
1326F2
Wise Men (Hard Version)
bitmasks
,
dp
,
math
3200
x470
1034E
Little C Loves 3 III
bitmasks
,
dp
,
math
3200
x601
1103D
Professional layer
bitmasks
,
dp
3100
x400
1225G
To Make 1
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
number theory
3100
x523
1463F
Max Correct Set
bitmasks
,
dp
,
math
3100
x552
1383C
String Transformation 2
bitmasks
,
dp
,
graphs
,
trees
3100
x561
1770F
Koxia and Sequence
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
3100
x618
1743G
Antifibonacci Cut
bitmasks
,
combinatorics
,
constructive algorithms
,
data structures
,
dp
,
hashing
,
math
3000
x245
1299D
Around the World
bitmasks
,
combinatorics
,
dfs and similar
,
dp
,
graphs
,
graphs
,
math
,
trees
3000
x419
582E
Boolean Function
bitmasks
,
dp
,
expression parsing
3000
x475
1842H
Tenzing and Random Real Numbers
bitmasks
,
dp
,
graphs
,
math
,
probabilities
3000
x563
1152F2
Neko Rules the Catniverse (Large Version)
bitmasks
,
dp
,
matrices
3000
x597
232E
Quick Tortoise
bitmasks
,
divide and conquer
,
dp
3000
x675
1342F
Make It Ascending
bitmasks
,
brute force
,
dp
3000
x688
1616H
Keep XOR Low
bitmasks
,
combinatorics
,
data structures
,
divide and conquer
,
dp
,
math
3000
x795
776G
Sherlock and the Encrypted Data
bitmasks
,
combinatorics
,
dp
2900
x330
1392G
Omkar and Pies
bitmasks
,
dfs and similar
,
dp
,
math
,
shortest paths
2900
x442
1713F
Lost Array
bitmasks
,
combinatorics
,
constructive algorithms
,
dp
,
math
2900
x510
1221G
Graph And Numbers
bitmasks
,
brute force
,
combinatorics
,
dp
,
meet-in-the-middle
2900
x520
1773G
Game of Questions
bitmasks
,
combinatorics
,
dp
,
fft
,
math
,
probabilities
2800
x321
1327G
Letters and Question Marks
bitmasks
,
dp
,
string suffix structures
2800
x407
83E
Two Subsequences
bitmasks
,
dp
2800
x454
1152F1
Neko Rules the Catniverse (Small Version)
bitmasks
,
dp
,
matrices
2800
x517
1322D
Reality Show
bitmasks
,
dp
2800
x699
79D
Password
bitmasks
,
dp
,
shortest paths
2800
x946
336E
Vasily the Bear and Painting Square
bitmasks
,
combinatorics
,
dp
,
implementation
2700
x109
76C
Mutation
bitmasks
,
dp
,
math
2700
x270
1730F
Almost Sorted
bitmasks
,
data structures
,
dp
2700
x412
1728G
Illumination
binary search
,
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
,
two pointers
2700
x424
938F
Erasing Substrings
bitmasks
,
dp
,
greedy
2700
x469
1789F
Serval and Brain Power
bitmasks
,
brute force
,
dp
,
greedy
,
implementation
,
strings
2700
x521
772D
Varying Kibibits
bitmasks
,
dp
2700
x572
1511G
Chips on a Board
bitmasks
,
brute force
,
data structures
,
dp
,
games
,
two pointers
2700
x701
356D
Bags and Coins
bitmasks
,
constructive algorithms
,
dp
,
greedy
2700
x936
1856E2
PermuTree (hard version)
bitmasks
,
dfs and similar
,
dp
,
fft
,
greedy
,
implementation
,
math
,
trees
2700
x1317
201D
Brand New Problem
bitmasks
,
brute force
,
dp
2600
x389
1679F
Formalism for Formalism
bitmasks
,
dp
,
math
2600
x501
1739F
Keyboard Design
bitmasks
,
data structures
,
dp
,
string suffix structures
,
strings
2600
x514
599E
Sandy and Nuts
bitmasks
,
dp
,
trees
2600
x616
1430G
Yet Another DAG Problem
bitmasks
,
dfs and similar
,
dp
,
flows
,
graphs
,
math
2600
x626
1530F
Bingo
bitmasks
,
combinatorics
,
dp
,
math
,
probabilities
2600
x753
1326F1
Wise Men (Easy Version)
bitmasks
,
brute force
,
dp
,
meet-in-the-middle
2600
x813
1584F
Strange LCS
bitmasks
,
dp
,
graphs
,
greedy
,
strings
2600
x847
482C
Game with Strings
bitmasks
,
dp
,
probabilities
2600
x872
914G
Sum the Fibonacci
bitmasks
,
divide and conquer
,
dp
,
fft
,
math
2600
x897
1400G
Mercenaries
bitmasks
,
brute force
,
combinatorics
,
dp
,
dsu
,
math
,
two pointers
2600
x903
1863F
Divide, XOR, and Conquer
bitmasks
,
dp
,
math
2600
x1031
1815D
XOR Counting
bitmasks
,
combinatorics
,
dp
,
math
2600
x1047
755F
PolandBall and Gifts
bitmasks
,
dp
,
greedy
2600
x1276
662C
Binary Table
bitmasks
,
brute force
,
divide and conquer
,
dp
,
fft
,
math
2600
x1959
1208F
Bits And Pieces
bitmasks
,
dfs and similar
,
dp
,
greedy
2600
x2109
845F
Guards In The Storehouse
bitmasks
,
dp
2500
x421
152E
Garden
bitmasks
,
dp
,
graphs
,
trees
2500
x460
1117F
Crisp String
bitmasks
,
dp
2500
x517
1709F
Multiset of Strings
bitmasks
,
brute force
,
dp
,
fft
,
flows
,
graphs
,
math
,
meet-in-the-middle
,
trees
2500
x535
1903D2
Maximum And Queries (hard version)
bitmasks
,
divide and conquer
,
dp
,
greedy
2500
x712
908E
New Year and Entity Enumeration
bitmasks
,
combinatorics
,
dp
,
math
2500
x734
1734F
Zeros and Ones
bitmasks
,
divide and conquer
,
dp
,
math
2500
x770
1767E
Algebra Flash
bitmasks
,
brute force
,
dp
,
graphs
,
math
,
meet-in-the-middle
,
trees
2500
x843
1498F
Christmas Game
bitmasks
,
data structures
,
dfs and similar
,
dp
,
games
,
math
,
trees
2500
x854
1917F
Construct Tree
bitmasks
,
constructive algorithms
,
dp
,
trees
2500
x901
53E
Dead Ends
bitmasks
,
dp
2500
x906
1716E
Swap and Maximum Block
bitmasks
,
data structures
,
dfs and similar
,
divide and conquer
,
dp
2500
x1022
1313D
Happy New Year
bitmasks
,
dp
,
implementation
2500
x1162
1556F
Sports Betting
bitmasks
,
combinatorics
,
dp
,
graphs
,
math
,
probabilities
2500
x1177
1779F
Xorcerer's Stones
bitmasks
,
constructive algorithms
,
dp
,
trees
2500
x1222
1710C
XOR Triangle
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
greedy
,
math
2500
x1277
543C
Remembering Strings
bitmasks
,
dp
2500
x1357
1550E
Stringforces
binary search
,
bitmasks
,
brute force
,
dp
,
strings
,
two pointers
2500
x1441
1497D
Genius
bitmasks
,
dp
,
graphs
,
number theory
2500
x1484
1327F
AND Segments
bitmasks
,
combinatorics
,
data structures
,
dp
,
two pointers
2500
x1607
1209E2
Rotate Columns (hard version)
bitmasks
,
dp
,
greedy
,
sortings
2500
x1853
1043F
Make It One
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
,
shortest paths
2500
x2190
1970G3
Min-Fund Prison (Hard)
bitmasks
,
dfs and similar
,
dp
,
graphs
,
trees
2400
x183
107C
Arrangement
bitmasks
,
dp
2400
x362
534F
Simplified Nonogram
bitmasks
,
dp
,
hashing
,
meet-in-the-middle
2400
x443
354B
Game with Strings
bitmasks
,
dp
,
games
2400
x448
441E
Valera and Number
bitmasks
,
dp
,
math
,
probabilities
2400
x675
1423J
Bubble Cup hypothesis
bitmasks
,
constructive algorithms
,
dp
,
math
2400
x736
913E
Logical Expression
bitmasks
,
dp
,
shortest paths
2400
x744
1620G
Subsequences Galore
bitmasks
,
combinatorics
,
dp
2400
x860
1670F
Jee, You See?
bitmasks
,
combinatorics
,
dp
2400
x919
1038E
Maximum Matching
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
2400
x954
744C
Hongcow Buys a Deck of Cards
bitmasks
,
brute force
,
dp
2400
x1011
780F
Axel and Marston in Bitland
bitmasks
,
dp
,
graphs
,
matrices
2400
x1020
1874B
Jellyfish and Math
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
shortest paths
2400
x1069
1679E
Typical Party in Dorm
bitmasks
,
combinatorics
,
dp
,
strings
2400
x1101
1739E
Cleaning Robot
bitmasks
,
dp
2400
x1171
906C
Party
bitmasks
,
brute force
,
dp
,
graphs
2400
x1182
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