Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Codeforces Round (Div. 2)
4 days
→ Filter Problems
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
Add tag
Main
acmsguru
|
Problems
Submit
Status
Standings
Custom test
Problems
#
Name
1527A
And Then There Were K
bitmasks
800
x29641
1698A
XOR Mixup
bitmasks
,
brute force
800
x24938
1421A
XORwice
bitmasks
,
greedy
,
math
800
x23895
1635A
Min Or Sum
bitmasks
,
greedy
800
x20224
1829C
Mr. Perfectly Fine
bitmasks
,
greedy
,
implementation
800
x19248
1688A
Cirno's Perfect Bitmasks Classroom
bitmasks
,
brute force
800
x18919
1566B
MIN-MEX Cut
bitmasks
,
constructive algorithms
,
dp
,
greedy
800
x17977
1696A
NIT orz!
bitmasks
,
greedy
800
x17123
1688B
Patchouli's Magical Talisman
bitmasks
,
constructive algorithms
,
greedy
,
sortings
800
x16977
1805A
We Need the Zero
bitmasks
,
brute force
800
x16375
1625A
Ancient Civilization
bitmasks
,
greedy
,
math
800
x16226
1763A
Absolute Maximization
bitmasks
,
constructive algorithms
,
greedy
,
math
800
x13998
202A
LLPS
binary search
,
bitmasks
,
brute force
,
greedy
,
implementation
,
strings
800
x13988
1559A
Mocha and Math
bitmasks
,
constructive algorithms
,
math
900
x24236
1494A
ABC String
bitmasks
,
brute force
,
implementation
900
x19286
1699B
Almost Ternary Matrix
bitmasks
,
constructive algorithms
,
matrices
900
x17665
579A
Raising Bacteria
bitmasks
1000
x45901
1567B
MEXor Mixup
bitmasks
,
greedy
1000
x19388
1632B
Roof Construction
bitmasks
,
constructive algorithms
1000
x18745
1566C
MAX-MEX Cut
bitmasks
,
constructive algorithms
,
dp
,
greedy
1000
x15909
467B
Fedor and New Game
bitmasks
,
brute force
,
constructive algorithms
,
implementation
1100
x31405
535B
Tavas and SaDDas
bitmasks
,
brute force
,
combinatorics
,
implementation
1100
x19146
1594B
Special Numbers
bitmasks
,
math
1100
x16849
1682B
AND Sorting
bitmasks
,
constructive algorithms
,
sortings
1100
x15250
1807G2
Subsequence Addition (Hard Version)
bitmasks
,
dp
,
greedy
,
implementation
,
sortings
1100
x13867
1726B
Mainak and Interesting Sequence
bitmasks
,
constructive algorithms
,
math
1100
x13566
1202A
You Are Given Two Binary Strings...
bitmasks
,
greedy
1100
x8213
1097B
Petr and a Combination Lock
bitmasks
,
brute force
,
dp
1200
x21787
1420B
Rock and Lever
bitmasks
,
math
1200
x20155
1514B
AND 0, Sum Big
bitmasks
,
combinatorics
,
math
1200
x19125
1362B
Johnny and His Hobbies
bitmasks
,
brute force
1200
x17287
1553C
Penalty
bitmasks
,
brute force
,
dp
,
greedy
1200
x15740
1042B
Vitamins
bitmasks
,
brute force
,
dp
,
implementation
1200
x13223
743B
Chloe and the sequence
binary search
,
bitmasks
,
constructive algorithms
,
implementation
1200
x12911
476B
Dreamoon and WiFi
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
,
probabilities
1300
x25396
1661B
Getting Zero
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
1300
x14728
1498B
Box Fitting
binary search
,
bitmasks
,
data structures
,
greedy
1300
x14591
1547D
Co-growing Sequence
bitmasks
,
constructive algorithms
,
greedy
1300
x14497
1615B
And It's Non-Zero
bitmasks
,
greedy
,
math
1300
x13531
1669H
Maximal AND
bitmasks
,
greedy
,
math
1300
x12952
96B
Lucky Numbers (easy)
binary search
,
bitmasks
,
brute force
1300
x12501
1601A
Array Elimination
bitmasks
,
greedy
,
math
,
number theory
1300
x11408
1775B
Gardener and the Array
bitmasks
,
constructive algorithms
1300
x10298
912B
New Year's Eve
bitmasks
,
constructive algorithms
,
number theory
1300
x10038
1659B
Bit Flipping
bitmasks
,
constructive algorithms
,
greedy
,
strings
1300
x9628
611B
New Year and Old Property
bitmasks
,
brute force
,
implementation
1300
x8711
1152B
Neko Performs Cat Furrier Transform
bitmasks
,
constructive algorithms
,
dfs and similar
,
math
1300
x8168
27B
Tournament
bitmasks
,
brute force
,
dfs and similar
,
greedy
1300
x4598
1463B
Find The Array
bitmasks
,
constructive algorithms
,
greedy
1400
x16731
550B
Preparing Olympiad
bitmasks
,
brute force
1400
x16104
1362C
Johnny and Another Rating Drop
bitmasks
,
greedy
,
math
1400
x15852
1312C
Adding Powers
bitmasks
,
greedy
,
implementation
,
math
,
number theory
,
ternary search
1400
x14702
1634B
Fortune Telling
bitmasks
,
math
1400
x14315
1095C
Powers Of Two
bitmasks
,
greedy
1400
x13662
1494B
Berland Crossword
bitmasks
,
brute force
,
greedy
,
implementation
1400
x13087
1270C
Make Good
bitmasks
,
constructive algorithms
,
math
1400
x12785
1513B
AND Sequences
bitmasks
,
combinatorics
,
constructive algorithms
,
math
1400
x12243
1790E
Vlad and a Pair of Numbers
bitmasks
,
constructive algorithms
1400
x11101
961C
Chessboard
bitmasks
,
brute force
,
implementation
1400
x5047
1600J
Robot Factory
bitmasks
,
dfs and similar
1400
x3423
1385D
a-Good String
bitmasks
,
brute force
,
divide and conquer
,
dp
,
implementation
1500
x16588
1516B
AGAGA XOOORRR
bitmasks
,
brute force
,
dp
,
greedy
1500
x15974
1630A
And Matching
bitmasks
,
constructive algorithms
1500
x12747
1646C
Factorials and Powers of Two
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
math
1500
x11383
1614C
Divan and bitwise operations
bitmasks
,
combinatorics
,
constructive algorithms
,
dp
,
math
1500
x9009
437B
The Child and Set
bitmasks
,
greedy
,
implementation
,
sortings
1500
x8526
1722G
Even-Odd XOR
bitmasks
,
constructive algorithms
,
greedy
1500
x8018
1742G
Orray
bitmasks
,
brute force
,
greedy
,
math
,
sortings
1500
x7501
224B
Array
bitmasks
,
implementation
,
two pointers
1500
x6715
677C
Vanya and Label
bitmasks
,
combinatorics
,
implementation
,
strings
1500
x5988
868C
Qualification Rounds
bitmasks
,
brute force
,
constructive algorithms
,
dp
1500
x4291
114B
PFAST Inc.
bitmasks
,
brute force
,
graphs
1500
x3097
1395C
Boboniu and Bit Operations
bitmasks
,
brute force
,
dp
,
greedy
1600
x12422
1567C
Carrying Conundrum
bitmasks
,
combinatorics
,
dp
,
math
1600
x11013
1632C
Strange Test
binary search
,
bitmasks
,
brute force
,
dp
,
math
1600
x10927
1151B
Dima and a Bad XOR
bitmasks
,
brute force
,
constructive algorithms
,
dp
1600
x9370
1225C
p-binary
bitmasks
,
brute force
,
math
1600
x8169
1703G
Good Key, Bad Key
bitmasks
,
brute force
,
dp
,
greedy
,
math
1600
x8137
1658D1
388535 (Easy Version)
bitmasks
,
math
1600
x7825
1775C
Interesting Sequence
bitmasks
,
math
1600
x7644
913C
Party Lemonade
bitmasks
,
dp
,
greedy
1600
x7409
1801A
The Very Beautiful Blanket
bitmasks
,
constructive algorithms
1600
x6480
1778C
Flexible String
bitmasks
,
brute force
,
strings
1600
x6263
878A
Short Program
bitmasks
,
constructive algorithms
1600
x5050
812B
Sagheer, the Hausmeister
bitmasks
,
brute force
,
dp
1600
x4874
244B
Undoubtedly Lucky Numbers
bitmasks
,
brute force
,
dfs and similar
1600
x3918
243A
The Brand New Function
bitmasks
1600
x3579
291C
Network Mask
*special problem
,
bitmasks
,
brute force
,
implementation
1600
x1633
1554B
Cobb
bitmasks
,
brute force
,
greedy
,
math
1700
x11479
276D
Little Girl and Maximum XOR
bitmasks
,
dp
,
greedy
,
implementation
,
math
1700
x11222
1360F
Spy-string
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
hashing
,
strings
1700
x10975
1325D
Ehab the Xorcist
bitmasks
,
constructive algorithms
,
greedy
,
number theory
1700
x10555
1516C
Baby Ehab Partitions Again
bitmasks
,
constructive algorithms
,
dp
,
math
1700
x10330
1368D
AND, OR and square sum
bitmasks
,
greedy
,
math
1700
x10313
484A
Bits
bitmasks
,
constructive algorithms
1700
x9537
1557C
Moamen and XOR
bitmasks
,
combinatorics
,
dp
,
math
,
matrices
1700
x7665
1332D
Walk on Matrix
bitmasks
,
constructive algorithms
,
math
1700
x7598
1731C
Even Subarrays
bitmasks
,
brute force
,
hashing
,
math
,
number theory
1700
x7476
1340B
Nastya and Scoreboard
bitmasks
,
dp
,
graphs
,
greedy
1700
x7325
1543D1
RPD and Rap Sheet (Easy Version)
bitmasks
,
constructive algorithms
,
interactive
,
math
1700
x7048
←
1
2
3
4
5
→
User lists
Name