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Before contest
Codeforces Round #792 (Div. 1 + Div. 2)
29:41:00
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Difficulty:
—
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
schedules
shortest paths
sortings
string suffix structures
strings
ternary search
trees
two pointers
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Problems
#
Name
1527A
And Then There Were K
bitmasks
800
x25652
1421A
XORwice
bitmasks
,
greedy
,
math
800
x20685
1635A
Min Or Sum
bitmasks
,
greedy
800
x17643
1566B
MIN-MEX Cut
bitmasks
,
constructive algorithms
,
dp
,
greedy
800
x16386
1625A
Ancient Civilization
bitmasks
,
greedy
,
math
800
x15002
202A
LLPS
binary search
,
bitmasks
,
brute force
,
greedy
,
implementation
,
strings
800
x11910
1559A
Mocha and Math
bitmasks
,
constructive algorithms
,
math
900
x20417
1494A
ABC String
bitmasks
,
brute force
,
implementation
900
x17846
579A
Raising Bacteria
bitmasks
1000
x36035
1567B
MEXor Mixup
bitmasks
,
greedy
1000
x17246
1632B
Roof Construction
bitmasks
,
constructive algorithms
1000
x16132
1566C
MAX-MEX Cut
bitmasks
,
constructive algorithms
,
dp
,
greedy
1000
x14122
467B
Fedor and New Game
bitmasks
,
brute force
,
constructive algorithms
,
implementation
1100
x27180
535B
Tavas and SaDDas
bitmasks
,
brute force
,
combinatorics
,
implementation
1100
x16996
1594B
Special Numbers
bitmasks
,
math
1100
x14310
1202A
You Are Given Two Binary Strings...
bitmasks
,
greedy
1100
x7816
1097B
Petr and a Combination Lock
bitmasks
,
brute force
,
dp
1200
x17821
1420B
Rock and Lever
bitmasks
,
math
1200
x17506
1514B
AND 0, Sum Big
bitmasks
,
combinatorics
,
math
1200
x16211
1362B
Johnny and His Hobbies
bitmasks
,
brute force
1200
x16150
1553C
Penalty
bitmasks
,
brute force
,
dp
,
greedy
1200
x13761
743B
Chloe and the sequence
binary search
,
bitmasks
,
constructive algorithms
,
implementation
1200
x11768
1042B
Vitamins
bitmasks
,
brute force
,
dp
,
implementation
1200
x11228
476B
Dreamoon and WiFi
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
,
probabilities
1300
x21718
1498B
Box Fitting
binary search
,
bitmasks
,
data structures
,
greedy
1300
x12924
1547D
Co-growing Sequence
bitmasks
,
constructive algorithms
,
greedy
1300
x12824
1615B
And It's Non-Zero
bitmasks
,
greedy
,
math
1300
x11414
1661B
Getting Zero
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
1300
x11021
96B
Lucky Numbers (easy)
binary search
,
bitmasks
,
brute force
1300
x10501
1601A
Array Elimination
bitmasks
,
greedy
,
math
,
number theory
1300
x9559
1669H
Maximal AND
bitmasks
,
greedy
,
math
1300
x8919
912B
New Year's Eve
bitmasks
,
constructive algorithms
,
number theory
1300
x8842
611B
New Year and Old Property
bitmasks
,
brute force
,
implementation
1300
x7920
1152B
Neko Performs Cat Furrier Transform
bitmasks
,
constructive algorithms
,
dfs and similar
,
math
1300
x7856
1659B
Bit Flipping
bitmasks
,
constructive algorithms
,
greedy
,
strings
1300
x7159
27B
Tournament
bitmasks
,
brute force
,
dfs and similar
,
greedy
1300
x4027
1362C
Johnny and Another Rating Drop
bitmasks
,
greedy
,
math
1400
x14594
1463B
Find The Array
bitmasks
,
constructive algorithms
,
greedy
1400
x14287
550B
Preparing Olympiad
bitmasks
,
brute force
1400
x13531
1312C
Adding Powers
bitmasks
,
greedy
,
implementation
,
math
,
number theory
,
ternary search
1400
x13388
1634B
Fortune Telling
bitmasks
,
math
1400
x12295
1095C
Powers Of Two
bitmasks
,
greedy
1400
x11936
1494B
Berland Crossword
bitmasks
,
brute force
,
greedy
,
implementation
1400
x11855
1270C
Make Good
bitmasks
,
constructive algorithms
,
math
1400
x11564
1513B
AND Sequences
bitmasks
,
combinatorics
,
constructive algorithms
,
math
1400
x10611
961C
Chessboard
bitmasks
,
brute force
,
implementation
1400
x4796
1600J
Robot Factory
bitmasks
,
dfs and similar
1400
x2692
1385D
a-Good String
bitmasks
,
brute force
,
divide and conquer
,
dp
,
implementation
1500
x14522
1516B
AGAGA XOOORRR
bitmasks
,
brute force
,
dp
,
greedy
1500
x13772
1630A
And Matching
bitmasks
,
constructive algorithms
1500
x10769
1646C
Factorials and Powers of Two
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
math
1500
x8853
437B
The Child and Set
bitmasks
,
greedy
,
implementation
,
sortings
1500
x7554
1614C
Divan and bitwise operations
bitmasks
,
combinatorics
,
constructive algorithms
,
dp
,
math
1500
x7532
224B
Array
bitmasks
,
implementation
,
two pointers
1500
x6097
677C
Vanya and Label
bitmasks
,
combinatorics
,
implementation
,
strings
1500
x5664
868C
Qualification Rounds
bitmasks
,
brute force
,
constructive algorithms
,
dp
1500
x3944
114B
PFAST Inc.
bitmasks
,
brute force
,
graphs
1500
x2778
1395C
Boboniu and Bit Operations
bitmasks
,
brute force
,
dp
,
greedy
1600
x11116
1567C
Carrying Conundrum
bitmasks
,
combinatorics
,
dp
,
math
1600
x9818
1632C
Strange Test
binary search
,
bitmasks
,
brute force
,
dp
,
math
1600
x9058
1151B
Dima and a Bad XOR
bitmasks
,
brute force
,
constructive algorithms
,
dp
1600
x8314
1225C
p-binary
bitmasks
,
brute force
,
math
1600
x7544
913C
Party Lemonade
bitmasks
,
dp
,
greedy
1600
x6988
1658D1
388535 (Easy Version)
bitmasks
,
math
1600
x6289
878A
Short Program
bitmasks
,
constructive algorithms
1600
x4738
812B
Sagheer, the Hausmeister
bitmasks
,
brute force
,
dp
1600
x4638
244B
Undoubtedly Lucky Numbers
bitmasks
,
brute force
,
dfs and similar
1600
x3619
243A
The Brand New Function
bitmasks
1600
x3352
291C
Network Mask
*special problem
,
bitmasks
,
brute force
,
implementation
1600
x1613
1554B
Cobb
bitmasks
,
brute force
,
greedy
,
math
1700
x10187
1360F
Spy-string
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
hashing
,
strings
1700
x9945
276D
Little Girl and Maximum XOR
bitmasks
,
dp
,
greedy
,
implementation
,
math
1700
x9626
1325D
Ehab the Xorcist
bitmasks
,
constructive algorithms
,
greedy
,
number theory
1700
x9456
1368D
AND, OR and square sum
bitmasks
,
greedy
,
math
1700
x9119
1516C
Baby Ehab Partitions Again
bitmasks
,
constructive algorithms
,
dp
,
math
1700
x9011
484A
Bits
bitmasks
,
constructive algorithms
1700
x8409
1332D
Walk on Matrix
bitmasks
,
constructive algorithms
,
math
1700
x7252
1340B
Nastya and Scoreboard
bitmasks
,
dp
,
graphs
,
greedy
1700
x6922
1557C
Moamen and XOR
bitmasks
,
combinatorics
,
dp
,
math
,
matrices
1700
x6828
1543D1
RPD and Rap Sheet (Easy Version)
bitmasks
,
constructive algorithms
,
interactive
,
math
1700
x6556
1217C
The Number Of Good Substrings
binary search
,
bitmasks
,
brute force
1700
x6320
1329B
Dreamoon Likes Sequences
bitmasks
,
combinatorics
,
math
1700
x5763
1051D
Bicolorings
bitmasks
,
dp
1700
x5744
1592C
Bakry and Partitioning
bitmasks
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
trees
1700
x5491
960C
Subsequence Counting
bitmasks
,
constructive algorithms
,
greedy
,
implementation
1700
x3453
1146C
Tree Diameter
bitmasks
,
graphs
,
interactive
1700
x3047
581D
Three Logos
bitmasks
,
brute force
,
constructive algorithms
,
geometry
,
implementation
,
math
1700
x2885
769D
k-Interesting Pairs Of Integers
*special problem
,
bitmasks
,
brute force
,
meet-in-the-middle
1700
x2008
442A
Borya and Hanabi
bitmasks
,
brute force
,
implementation
1700
x1968
1571E
Fix the String
*special problem
,
bitmasks
,
dp
,
greedy
1700
x223
1338B
Edge Weight Assignment
bitmasks
,
constructive algorithms
,
dfs and similar
,
greedy
,
math
,
trees
1800
x6961
580D
Kefa and Dishes
bitmasks
,
dp
1800
x6885
1554C
Mikasa
binary search
,
bitmasks
,
greedy
,
implementation
1800
x6733
706D
Vasiliy's Multiset
binary search
,
bitmasks
,
data structures
,
trees
1800
x6709
1466E
Apollo versus Pan
bitmasks
,
brute force
,
math
1800
x5844
1491D
Zookeeper and The Infinite Zoo
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
math
1800
x5671
1552D
Array Differentiation
bitmasks
,
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
math
1800
x5303
1556D
Take a Guess
bitmasks
,
constructive algorithms
,
interactive
,
math
1800
x4918
1635D
Infinite Set
bitmasks
,
dp
,
math
,
matrices
,
number theory
,
strings
1800
x4305
888E
Maximum Subsequence
bitmasks
,
divide and conquer
,
meet-in-the-middle
1800
x4297
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