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Contest is running
Codeforces Round 942 (Div. 1)
01:11:49
Contest is running
Codeforces Round 942 (Div. 2)
01:11:50
→ Filter Problems
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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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ternary search
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Problems
#
Name
579A
Raising Bacteria
bitmasks
1000
x55916
1915A
Odd One Out
bitmasks
,
implementation
800
x49202
1915B
Not Quite Latin Square
bitmasks
,
brute force
,
implementation
800
x38211
467B
Fedor and New Game
bitmasks
,
brute force
,
constructive algorithms
,
implementation
1100
x35720
1527A
And Then There Were K
bitmasks
800
x33842
1843C
Sum in Binary Tree
bitmasks
,
combinatorics
,
math
,
trees
800
x30987
476B
Dreamoon and WiFi
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
,
probabilities
1300
x28974
1559A
Mocha and Math
bitmasks
,
constructive algorithms
,
math
900
x28415
1698A
XOR Mixup
bitmasks
,
brute force
800
x27761
1421A
XORwice
bitmasks
,
greedy
,
math
800
x27180
1829C
Mr. Perfectly Fine
bitmasks
,
greedy
,
implementation
800
x27009
1097B
Petr and a Combination Lock
bitmasks
,
brute force
,
dp
1200
x26523
1420B
Rock and Lever
bitmasks
,
math
1200
x23569
1514B
AND 0, Sum Big
bitmasks
,
combinatorics
,
math
1200
x22679
1635A
Min Or Sum
bitmasks
,
greedy
800
x22047
535B
Tavas and SaDDas
bitmasks
,
brute force
,
combinatorics
,
implementation
1100
x21572
1840B
Binary Cafe
bitmasks
,
combinatorics
,
math
1100
x21436
1567B
MEXor Mixup
bitmasks
,
greedy
1000
x21380
1805A
We Need the Zero
bitmasks
,
brute force
800
x20920
1632B
Roof Construction
bitmasks
,
constructive algorithms
1000
x20784
1688A
Cirno's Perfect Bitmasks Classroom
bitmasks
,
brute force
800
x20590
1494A
ABC String
bitmasks
,
brute force
,
implementation
900
x20391
550B
Preparing Olympiad
bitmasks
,
brute force
1400
x19422
1699B
Almost Ternary Matrix
bitmasks
,
constructive algorithms
,
matrices
900
x19139
1566B
MIN-MEX Cut
bitmasks
,
constructive algorithms
,
dp
,
greedy
800
x19076
1847B
Hamon Odyssey
bitmasks
,
greedy
,
two pointers
1000
x19043
1594B
Special Numbers
bitmasks
,
math
1100
x18796
1463B
Find The Array
bitmasks
,
constructive algorithms
,
greedy
1400
x18715
1362B
Johnny and His Hobbies
bitmasks
,
brute force
1200
x18326
1385D
a-Good String
bitmasks
,
brute force
,
divide and conquer
,
dp
,
implementation
1500
x18296
1696A
NIT orz!
bitmasks
,
greedy
800
x18091
1516B
AGAGA XOOORRR
bitmasks
,
brute force
,
dp
,
greedy
1500
x18028
1688B
Patchouli's Magical Talisman
bitmasks
,
constructive algorithms
,
greedy
,
sortings
800
x17839
1807G2
Subsequence Addition (Hard Version)
bitmasks
,
dp
,
greedy
,
implementation
,
sortings
1100
x17619
1553C
Penalty
bitmasks
,
brute force
,
dp
,
greedy
1200
x17279
1682B
AND Sorting
bitmasks
,
constructive algorithms
,
sortings
1100
x17122
1566C
MAX-MEX Cut
bitmasks
,
constructive algorithms
,
dp
,
greedy
1000
x16994
1362C
Johnny and Another Rating Drop
bitmasks
,
greedy
,
math
1400
x16981
1661B
Getting Zero
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
1300
x16946
1625A
Ancient Civilization
bitmasks
,
greedy
,
math
800
x16937
1669H
Maximal AND
bitmasks
,
greedy
,
math
1300
x16104
1498B
Box Fitting
binary search
,
bitmasks
,
data structures
,
greedy
1300
x16052
1547D
Co-growing Sequence
bitmasks
,
constructive algorithms
,
greedy
1300
x15988
202A
LLPS
binary search
,
bitmasks
,
brute force
,
greedy
,
implementation
,
strings
800
x15848
1312C
Adding Powers
bitmasks
,
greedy
,
implementation
,
math
,
number theory
,
ternary search
1400
x15808
1867B
XOR Palindromes
bitmasks
,
constructive algorithms
,
strings
1100
x15779
1095C
Powers Of Two
bitmasks
,
greedy
1400
x15695
1634B
Fortune Telling
bitmasks
,
math
1400
x15613
1842B
Tenzing and Books
bitmasks
,
greedy
,
math
1100
x15580
1763A
Absolute Maximization
bitmasks
,
constructive algorithms
,
greedy
,
math
800
x15246
1615B
And It's Non-Zero
bitmasks
,
greedy
,
math
1300
x15175
1042B
Vitamins
bitmasks
,
brute force
,
dp
,
implementation
1200
x15153
1726B
Mainak and Interesting Sequence
bitmasks
,
constructive algorithms
,
math
1100
x14626
96B
Lucky Numbers (easy)
binary search
,
bitmasks
,
brute force
1300
x14389
1882B
Sets and Union
bitmasks
,
brute force
,
constructive algorithms
,
greedy
1300
x14217
743B
Chloe and the sequence
binary search
,
bitmasks
,
constructive algorithms
,
implementation
1200
x14204
1790E
Vlad and a Pair of Numbers
bitmasks
,
constructive algorithms
1400
x14126
1630A
And Matching
bitmasks
,
constructive algorithms
1500
x14047
1944B
Equal XOR
bitmasks
,
constructive algorithms
1100
x13999
1494B
Berland Crossword
bitmasks
,
brute force
,
greedy
,
implementation
1400
x13923
1957B
A BIT of a Construction
bitmasks
,
constructive algorithms
,
greedy
,
implementation
x13898
1909B
Make Almost Equal With Mod
bitmasks
,
constructive algorithms
,
math
,
number theory
1200
x13731
1513B
AND Sequences
bitmasks
,
combinatorics
,
constructive algorithms
,
math
1400
x13703
1270C
Make Good
bitmasks
,
constructive algorithms
,
math
1400
x13574
1913C
Game with Multiset
binary search
,
bitmasks
,
brute force
,
greedy
1300
x13558
1395C
Boboniu and Bit Operations
bitmasks
,
brute force
,
dp
,
greedy
1600
x13495
1926D
Vlad and Division
bitmasks
,
greedy
1300
x13357
1870B
Friendly Arrays
bitmasks
,
greedy
,
math
1200
x13299
1601A
Array Elimination
bitmasks
,
greedy
,
math
,
number theory
1300
x13158
1646C
Factorials and Powers of Two
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
math
1500
x13115
276D
Little Girl and Maximum XOR
bitmasks
,
dp
,
greedy
,
implementation
,
math
1700
x12924
1864C
Divisor Chain
bitmasks
,
constructive algorithms
,
math
,
number theory
1300
x12552
1775B
Gardener and the Array
bitmasks
,
constructive algorithms
1300
x12490
1918C
XOR-distance
bitmasks
,
greedy
,
implementation
,
math
1400
x12444
1554B
Cobb
bitmasks
,
brute force
,
greedy
,
math
1700
x12393
1632C
Strange Test
binary search
,
bitmasks
,
brute force
,
dp
,
math
1600
x12227
1847C
Vampiric Powers, anyone?
bitmasks
,
brute force
,
dp
,
greedy
1400
x12189
1360F
Spy-string
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
hashing
,
strings
1700
x11836
1872E
Data Structures Fan
binary search
,
bitmasks
,
data structures
,
dp
1500
x11826
1567C
Carrying Conundrum
bitmasks
,
combinatorics
,
dp
,
math
1600
x11824
1325D
Ehab the Xorcist
bitmasks
,
constructive algorithms
,
greedy
,
number theory
1700
x11534
1516C
Baby Ehab Partitions Again
bitmasks
,
constructive algorithms
,
dp
,
math
1700
x11503
912B
New Year's Eve
bitmasks
,
constructive algorithms
,
number theory
1300
x11310
1903B
StORage room
bitmasks
,
brute force
,
constructive algorithms
,
greedy
1200
x11267
1368D
AND, OR and square sum
bitmasks
,
greedy
,
math
1700
x11201
1878E
Iva & Pav
binary search
,
bitmasks
,
data structures
,
greedy
1400
x10943
1875C
Jellyfish and Green Apple
bitmasks
,
greedy
,
math
,
number theory
1400
x10747
484A
Bits
bitmasks
,
constructive algorithms
1700
x10676
1151B
Dima and a Bad XOR
bitmasks
,
brute force
,
constructive algorithms
,
dp
1600
x10675
1659B
Bit Flipping
bitmasks
,
constructive algorithms
,
greedy
,
strings
1300
x10598
1722G
Even-Odd XOR
bitmasks
,
constructive algorithms
,
greedy
1500
x10298
1703G
Good Key, Bad Key
bitmasks
,
brute force
,
dp
,
greedy
,
math
1600
x9963
1614C
Divan and bitwise operations
bitmasks
,
combinatorics
,
constructive algorithms
,
dp
,
math
1500
x9900
1926E
Vlad and an Odd Ordering
binary search
,
bitmasks
,
data structures
,
dp
,
implementation
,
math
,
number theory
1500
x9837
1742G
Orray
bitmasks
,
brute force
,
greedy
,
math
,
sortings
1500
x9792
611B
New Year and Old Property
bitmasks
,
brute force
,
implementation
1300
x9761
1775C
Interesting Sequence
bitmasks
,
math
1600
x9612
706D
Vasiliy's Multiset
binary search
,
bitmasks
,
data structures
,
trees
1800
x9243
580D
Kefa and Dishes
bitmasks
,
dp
1800
x9145
437B
The Child and Set
bitmasks
,
greedy
,
implementation
,
sortings
1500
x9143
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