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Codeforces Round 941 (Div. 1)
2 days
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Before contest
Codeforces Round 941 (Div. 2)
2 days
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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
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greedy
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implementation
interactive
math
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Name
1950F
0, 1, 2, Tree!
bitmasks
,
brute force
,
greedy
,
implementation
,
trees
1700
x7119
1936A
Bitwise Operation Wizard
bitmasks
,
constructive algorithms
,
greedy
,
interactive
,
math
1700
x6447
1926E
Vlad and an Odd Ordering
binary search
,
bitmasks
,
data structures
,
dp
,
implementation
,
math
,
number theory
1500
x9781
1922E
Increasing Subsequences
bitmasks
,
constructive algorithms
,
divide and conquer
,
greedy
,
math
1800
x6960
1912K
Kim's Quest
bitmasks
,
combinatorics
,
dp
1800
x1968
1903D1
Maximum And Queries (easy version)
binary search
,
bitmasks
,
brute force
,
greedy
1700
x5015
1883E
Look Back
bitmasks
,
greedy
1700
x6960
1879D
Sum of XOR Functions
bitmasks
,
combinatorics
,
divide and conquer
,
dp
,
math
1700
x6512
1872E
Data Structures Fan
binary search
,
bitmasks
,
data structures
,
dp
1500
x11785
1868B1
Candy Party (Easy Version)
bitmasks
,
constructive algorithms
,
graphs
,
greedy
,
implementation
,
math
1700
x6401
1862F
Magic Will Save the World
binary search
,
bitmasks
,
brute force
,
dp
1800
x5604
1851F
Lisa and the Martians
bitmasks
,
greedy
,
math
,
strings
,
trees
1800
x5263
1829H
Don't Blame Me
bitmasks
,
combinatorics
,
dp
,
math
1700
x6992
1801A
The Very Beautiful Blanket
bitmasks
,
constructive algorithms
1600
x8079
1792D
Fixed Prefix Permutations
binary search
,
bitmasks
,
data structures
,
hashing
,
math
,
sortings
1700
x5857
1780D
Bit Guessing Game
binary search
,
bitmasks
,
constructive algorithms
,
interactive
1800
x4628
1778C
Flexible String
bitmasks
,
brute force
,
strings
1600
x7625
1775C
Interesting Sequence
bitmasks
,
math
1600
x9575
1760G
SlavicG's Favorite Problem
bitmasks
,
dfs and similar
,
graphs
1700
x6844
1742G
Orray
bitmasks
,
brute force
,
greedy
,
math
,
sortings
1500
x9753
1732C1
Sheikh (Easy version)
binary search
,
bitmasks
,
greedy
,
two pointers
1800
x5547
1731C
Even Subarrays
bitmasks
,
brute force
,
hashing
,
math
,
number theory
1700
x8888
1722G
Even-Odd XOR
bitmasks
,
constructive algorithms
,
greedy
1500
x10260
1721D
Maximum AND
bitmasks
,
dfs and similar
,
divide and conquer
,
greedy
,
sortings
1800
x6271
1720D1
Xor-Subsequence (easy version)
bitmasks
,
brute force
,
dp
,
strings
,
trees
,
two pointers
1800
x5704
1703G
Good Key, Bad Key
bitmasks
,
brute force
,
dp
,
greedy
,
math
1600
x9948
1658D1
388535 (Easy Version)
bitmasks
,
math
1600
x8735
1646C
Factorials and Powers of Two
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
math
1500
x13086
1635D
Infinite Set
bitmasks
,
dp
,
math
,
matrices
,
number theory
,
strings
1800
x5986
1632C
Strange Test
binary search
,
bitmasks
,
brute force
,
dp
,
math
1600
x12218
1630A
And Matching
bitmasks
,
constructive algorithms
1500
x14034
1614C
Divan and bitwise operations
bitmasks
,
combinatorics
,
constructive algorithms
,
dp
,
math
1500
x9899
1592C
Bakry and Partitioning
bitmasks
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
trees
1700
x7582
1582F1
Korney Korneevich and XOR (easy version)
bitmasks
,
dp
,
greedy
1800
x5237
1571E
Fix the String
*special problem
,
bitmasks
,
dp
,
greedy
1700
x319
1567C
Carrying Conundrum
bitmasks
,
combinatorics
,
dp
,
math
1600
x11816
1557C
Moamen and XOR
bitmasks
,
combinatorics
,
dp
,
math
,
matrices
1700
x8303
1556D
Take a Guess
bitmasks
,
constructive algorithms
,
interactive
,
math
1800
x6456
1554C
Mikasa
binary search
,
bitmasks
,
greedy
,
implementation
1800
x8496
1554B
Cobb
bitmasks
,
brute force
,
greedy
,
math
1700
x12379
1552D
Array Differentiation
bitmasks
,
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
math
1800
x6673
1543D1
RPD and Rap Sheet (Easy Version)
bitmasks
,
constructive algorithms
,
interactive
,
math
1700
x7422
1516C
Baby Ehab Partitions Again
bitmasks
,
constructive algorithms
,
dp
,
math
1700
x11492
1516B
AGAGA XOOORRR
bitmasks
,
brute force
,
dp
,
greedy
1500
x17999
1491D
Zookeeper and The Infinite Zoo
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
math
1800
x6869
1466E
Apollo versus Pan
bitmasks
,
brute force
,
math
1800
x6931
1395C
Boboniu and Bit Operations
bitmasks
,
brute force
,
dp
,
greedy
1600
x13486
1385D
a-Good String
bitmasks
,
brute force
,
divide and conquer
,
dp
,
implementation
1500
x18278
1368D
AND, OR and square sum
bitmasks
,
greedy
,
math
1700
x11187
1360F
Spy-string
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
hashing
,
strings
1700
x11819
1340B
Nastya and Scoreboard
bitmasks
,
dp
,
graphs
,
greedy
1700
x7565
1338B
Edge Weight Assignment
bitmasks
,
constructive algorithms
,
dfs and similar
,
greedy
,
math
,
trees
1800
x8037
1332D
Walk on Matrix
bitmasks
,
constructive algorithms
,
math
1700
x7807
1329B
Dreamoon Likes Sequences
bitmasks
,
combinatorics
,
math
1700
x6350
1325D
Ehab the Xorcist
bitmasks
,
constructive algorithms
,
greedy
,
number theory
1700
x11504
1225C
p-binary
bitmasks
,
brute force
,
math
1600
x8638
1217C
The Number Of Good Substrings
binary search
,
bitmasks
,
brute force
1700
x7082
1151B
Dima and a Bad XOR
bitmasks
,
brute force
,
constructive algorithms
,
dp
1600
x10670
1146C
Tree Diameter
bitmasks
,
graphs
,
interactive
1700
x3454
1051D
Bicolorings
bitmasks
,
dp
1700
x7112
960C
Subsequence Counting
bitmasks
,
constructive algorithms
,
greedy
,
implementation
1700
x3806
913C
Party Lemonade
bitmasks
,
dp
,
greedy
1600
x7733
888E
Maximum Subsequence
bitmasks
,
divide and conquer
,
meet-in-the-middle
1800
x6573
878A
Short Program
bitmasks
,
constructive algorithms
1600
x5257
868C
Qualification Rounds
bitmasks
,
brute force
,
constructive algorithms
,
dp
1500
x4520
812B
Sagheer, the Hausmeister
bitmasks
,
brute force
,
dp
1600
x5068
778B
Bitwise Formula
bitmasks
,
brute force
,
dfs and similar
,
expression parsing
,
implementation
1800
x2253
769D
k-Interesting Pairs Of Integers
*special problem
,
bitmasks
,
brute force
,
meet-in-the-middle
1700
x2208
706D
Vasiliy's Multiset
binary search
,
bitmasks
,
data structures
,
trees
1800
x9226
677C
Vanya and Label
bitmasks
,
combinatorics
,
implementation
,
strings
1500
x6270
581D
Three Logos
bitmasks
,
brute force
,
constructive algorithms
,
geometry
,
implementation
,
math
1700
x3411
580D
Kefa and Dishes
bitmasks
,
dp
1800
x9119
513B2
Permutations
bitmasks
,
divide and conquer
,
math
1800
x2561
484A
Bits
bitmasks
,
constructive algorithms
1700
x10654
442A
Borya and Hanabi
bitmasks
,
brute force
,
implementation
1700
x2092
437B
The Child and Set
bitmasks
,
greedy
,
implementation
,
sortings
1500
x9132
291C
Network Mask
*special problem
,
bitmasks
,
brute force
,
implementation
1600
x1663
276D
Little Girl and Maximum XOR
bitmasks
,
dp
,
greedy
,
implementation
,
math
1700
x12905
244B
Undoubtedly Lucky Numbers
bitmasks
,
brute force
,
dfs and similar
1600
x4363
243A
The Brand New Function
bitmasks
1600
x3781
224B
Array
bitmasks
,
implementation
,
two pointers
1500
x7145
114B
PFAST Inc.
bitmasks
,
brute force
,
graphs
1500
x3511
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