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Before contest
Codeforces Round 941 (Div. 1)
4 days
Before contest
Codeforces Round 941 (Div. 2)
4 days
→ Filter Problems
Difficulty:
—
greedy
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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Custom test
Problems
#
Name
1477B
Nezzar and Binary String
data structures
,
greedy
1900
x3057
722D
Generating Sets
binary search
,
data structures
,
dfs and similar
,
greedy
,
strings
,
trees
1900
x3072
981D
Bookshelves
bitmasks
,
dp
,
greedy
1900
x3155
1801C
Music Festival
binary search
,
data structures
,
dp
,
greedy
,
sortings
1900
x3191
708B
Recover the String
constructive algorithms
,
greedy
,
implementation
,
math
1900
x3193
839B
Game of the Rows
brute force
,
greedy
,
implementation
1900
x3256
1774E
Two Chess Pieces
dfs and similar
,
dp
,
greedy
,
trees
1900
x3301
1361B
Johnny and Grandmaster
greedy
,
implementation
,
math
,
sortings
1900
x3384
1677C
Tokitsukaze and Two Colorful Tapes
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
1900
x3385
1819B
The Butcher
geometry
,
greedy
,
implementation
,
sortings
,
two pointers
1900
x3407
1015E2
Stars Drawing (Hard Edition)
binary search
,
dp
,
greedy
1900
x3456
1041E
Tree Reconstruction
constructive algorithms
,
data structures
,
graphs
,
greedy
1900
x3498
1060D
Social Circles
greedy
,
math
1900
x3555
1808C
Unlucky Numbers
brute force
,
dp
,
greedy
,
implementation
1900
x3557
1260D
A Game with Traps
binary search
,
dp
,
greedy
,
sortings
1900
x3579
1847D
Professor Higashikata
data structures
,
dsu
,
greedy
,
implementation
,
strings
1900
x3581
1157D
N Problems During K Days
constructive algorithms
,
greedy
,
math
1900
x3598
1914F
Programming Competition
dfs and similar
,
dp
,
graph matchings
,
greedy
,
trees
1900
x3624
1611E2
Escape The Maze (hard version)
dfs and similar
,
dp
,
greedy
,
shortest paths
,
trees
1900
x3626
1927F
Microcycle
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
sortings
,
trees
1900
x3672
1928D
Lonely Mountain Dungeons
brute force
,
data structures
,
greedy
,
math
,
ternary search
1900
x3679
535C
Tavas and Karafs
binary search
,
greedy
,
math
1900
x3702
535D
Tavas and Malekas
greedy
,
hashing
,
string suffix structures
,
strings
1900
x3710
1141F1
Same Sum Blocks (Easy)
greedy
1900
x3727
1384B1
Koa and the Beach (Easy Version)
brute force
,
dp
,
greedy
1900
x3829
1946D
Birthday Gift
bitmasks
,
brute force
,
constructive algorithms
,
greedy
,
implementation
1900
x3836
1659D
Reverse Sort Sum
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
,
two pointers
1900
x3856
1842D
Tenzing and His Animal Friends
constructive algorithms
,
graphs
,
greedy
1900
x3896
558C
Amr and Chemistry
brute force
,
graphs
,
greedy
,
math
,
shortest paths
1900
x3914
1909D
Split Plus K
greedy
,
math
,
number theory
1900
x3929
557C
Arthur and Table
brute force
,
data structures
,
dp
,
greedy
,
math
,
sortings
1900
x3937
1650E
Rescheduling the Exam
binary search
,
data structures
,
greedy
,
implementation
,
math
,
sortings
1900
x3998
1846G
Rudolf and CodeVid-23
bitmasks
,
dp
,
graphs
,
greedy
,
shortest paths
1900
x4006
1421D
Hexagons
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
,
shortest paths
1900
x4045
1141F2
Same Sum Blocks (Hard)
data structures
,
greedy
1900
x4048
1453D
Checkpoints
brute force
,
constructive algorithms
,
greedy
,
math
,
probabilities
1900
x4071
1178E
Archaeology
brute force
,
constructive algorithms
,
greedy
,
strings
1900
x4113
1237C2
Balanced Removals (Harder)
binary search
,
constructive algorithms
,
divide and conquer
,
greedy
,
implementation
,
sortings
1900
x4125
999D
Equalize the Remainders
data structures
,
greedy
,
implementation
1900
x4134
3B
Lorry
greedy
,
sortings
1900
x4194
1759G
Restore the Permutation
binary search
,
constructive algorithms
,
data structures
,
greedy
,
math
1900
x4199
1463D
Pairs
binary search
,
constructive algorithms
,
greedy
,
two pointers
1900
x4228
1717D
Madoka and The Corruption Scheme
combinatorics
,
constructive algorithms
,
greedy
,
math
1900
x4237
476D
Dreamoon and Sets
constructive algorithms
,
greedy
,
math
1900
x4310
1834D
Survey in Class
brute force
,
data structures
,
greedy
,
implementation
,
sortings
1900
x4323
1428D
Bouncing Boomerangs
constructive algorithms
,
greedy
,
implementation
1900
x4397
1746D
Paths on the Tree
dfs and similar
,
dp
,
greedy
,
sortings
,
trees
1900
x4408
1791G2
Teleporters (Hard Version)
binary search
,
greedy
,
sortings
1900
x4441
1661D
Progressions Covering
data structures
,
greedy
1900
x4499
1208D
Restore Permutation
binary search
,
data structures
,
greedy
,
implementation
1900
x4648
1898D
Absolute Beauty
greedy
,
math
1900
x4671
1294E
Obtain a Permutation
greedy
,
implementation
,
math
1900
x4677
1821D
Black Cells
binary search
,
brute force
,
greedy
,
math
1900
x4727
1383B
GameGame
bitmasks
,
constructive algorithms
,
dp
,
games
,
greedy
,
math
1900
x4747
1153D
Serval and Rooted Tree
binary search
,
dfs and similar
,
dp
,
greedy
,
trees
1900
x4802
1883G2
Dances (Hard Version)
binary search
,
greedy
,
sortings
,
two pointers
1900
x4825
1119E
Pavel and Triangles
brute force
,
dp
,
fft
,
greedy
,
ternary search
1900
x4839
1739D
Reset K Edges
binary search
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
1900
x4842
1715D
2+ doors
2-sat
,
bitmasks
,
graphs
,
greedy
1900
x4897
803C
Maximal GCD
constructive algorithms
,
greedy
,
math
1900
x4903
1882D
Tree XOR
bitmasks
,
dfs and similar
,
dp
,
greedy
,
trees
1900
x4926
1439A2
Binary Table (Hard Version)
constructive algorithms
,
graphs
,
greedy
,
implementation
1900
x4941
1718A2
Burenka and Traditions (hard version)
data structures
,
dp
,
greedy
1900
x4966
1197D
Yet Another Subarray Problem
dp
,
greedy
,
math
1900
x5083
1367E
Necklace Assembly
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
number theory
1900
x5121
1696D
Permutation Graph
binary search
,
constructive algorithms
,
data structures
,
divide and conquer
,
greedy
,
shortest paths
1900
x5155
1494C
1D Sokoban
binary search
,
dp
,
greedy
,
implementation
,
two pointers
1900
x5220
552C
Vanya and Scales
brute force
,
dp
,
greedy
,
math
,
meet-in-the-middle
,
number theory
1900
x5380
1701D
Permutation Restoration
binary search
,
data structures
,
greedy
,
math
,
sortings
,
two pointers
1900
x5460
1624G
MinOr Tree
bitmasks
,
dfs and similar
,
dsu
,
graphs
,
greedy
1900
x5509
1264B
Beautiful Sequence
brute force
,
constructive algorithms
,
greedy
1900
x5576
1251D
Salary Changing
binary search
,
greedy
,
sortings
1900
x5607
1175D
Array Splitting
greedy
,
sortings
1900
x5627
1700D
River Locks
binary search
,
dp
,
greedy
,
math
1900
x5814
1095F
Make It Connected
dsu
,
graphs
,
greedy
1900
x5820
1342D
Multiple Testcases
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
,
two pointers
1900
x5825
1436D
Bandit in a City
binary search
,
dfs and similar
,
graphs
,
greedy
,
trees
1900
x5826
1495B
Let's Go Hiking
games
,
greedy
1900
x5831
1560F1
Nearest Beautiful Number (easy version)
binary search
,
bitmasks
,
brute force
,
constructive algorithms
,
dfs and similar
,
greedy
1900
x5895
1512F
Education
brute force
,
dp
,
greedy
,
implementation
1900
x5910
1492D
Genius's Gambit
bitmasks
,
constructive algorithms
,
greedy
,
math
1900
x5919
1508A
Binary Literature
constructive algorithms
,
greedy
,
implementation
,
strings
,
two pointers
1900
x5979
1307D
Cow and Fields
binary search
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
sortings
1900
x5997
1313C2
Skyscrapers (hard version)
data structures
,
dp
,
greedy
1900
x6124
1430E
String Reversal
data structures
,
greedy
,
strings
1900
x6142
1467C
Three Bags
constructive algorithms
,
greedy
1900
x6198
1155D
Beautiful Array
brute force
,
data structures
,
divide and conquer
,
dp
,
greedy
1900
x6668
1479B1
Painting the Array I
constructive algorithms
,
data structures
,
dp
,
greedy
,
implementation
1900
x6722
1353E
K-periodic Garland
brute force
,
dp
,
greedy
1900
x6758
1303D
Fill The Bag
bitmasks
,
greedy
1900
x6785
1245D
Shichikuji and Power Grid
dsu
,
graphs
,
greedy
,
shortest paths
,
trees
1900
x6855
1285D
Dr. Evil Underscores
bitmasks
,
brute force
,
dfs and similar
,
divide and conquer
,
dp
,
greedy
,
strings
,
trees
1900
x7318
1360G
A/B Matrix
constructive algorithms
,
greedy
,
math
1900
x7370
448C
Painting Fence
divide and conquer
,
dp
,
greedy
1900
x7784
1358D
The Best Vacation
binary search
,
brute force
,
greedy
,
implementation
,
two pointers
1900
x7995
1369D
TediousLee
dp
,
graphs
,
greedy
,
math
,
trees
1900
x8241
463C
Gargari and Bishops
greedy
,
hashing
,
implementation
1900
x8348
1348D
Phoenix and Science
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
1900
x8469
5C
Longest Regular Bracket Sequence
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
,
strings
1900
x12615
72A
Goshtasp, Vishtasp and Eidi
*special problem
,
greedy
,
math
1800
x181
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