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Before contest
CodeCraft-22 and Codeforces Round #795 (Div. 2)
3 days
→ Filter Problems
Difficulty:
—
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
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Status
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Custom test
Problems
#
Name
1686B
Odd Subarrays
dp
,
greedy
800
x11108
1686A
Everything Everywhere All But One
greedy
800
x12921
1685E
The Ultimate LIS Problem
data structures
,
greedy
3500
x17
1685D2
Permutation Weight (Hard Version)
constructive algorithms
,
greedy
3500
x15
1685D1
Permutation Weight (Easy Version)
constructive algorithms
,
dfs and similar
,
dsu
2800
x141
1685C
Bring Balance
brute force
,
constructive algorithms
,
greedy
2600
x283
1685B
Linguistics
greedy
,
implementation
,
strings
,
two pointers
2000
x1435
1685A
Circular Local MiniMax
constructive algorithms
,
greedy
,
sortings
1100
x9221
1684H
Hard Cut
constructive algorithms
,
dfs and similar
,
divide and conquer
,
math
3400
x85
1684G
Euclid Guess
constructive algorithms
,
flows
,
graph matchings
,
math
,
number theory
2800
x294
1684F
Diverse Segments
data structures
,
two pointers
2600
x495
1684E
MEX vs DIFF
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
2100
x1848
1684D
Traps
constructive algorithms
,
greedy
,
sortings
1700
x5847
1684C
Column Swapping
brute force
,
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x7801
1684B
Z mod X = C
constructive algorithms
,
math
800
x15341
1684A
Digit Minimization
constructive algorithms
,
games
,
math
,
strings
800
x17574
1682F
MCMF?
data structures
,
flows
,
graphs
,
greedy
,
sortings
,
two pointers
2700
x112
1682E
Unordered Swaps
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
math
,
sortings
,
trees
2700
x219
1682D
Circular Spanning Tree
constructive algorithms
,
trees
2000
x1780
1682C
LIS or Reverse LIS?
constructive algorithms
,
greedy
,
implementation
,
math
1400
x8080
1682B
AND Sorting
bitmasks
,
constructive algorithms
,
sortings
1100
x10599
1682A
Palindromic Indices
greedy
,
strings
800
x13865
1681F
Unique Occurrences
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
dsu
,
trees
2300
x604
1681E
Labyrinth Adventures
data structures
,
dp
,
matrices
,
shortest paths
2600
x311
1681D
Required Length
brute force
,
dfs and similar
,
dp
,
hashing
,
shortest paths
1700
x5275
1681C
Double Sort
implementation
,
sortings
1200
x10407
1681B
Card Trick
implementation
,
math
800
x14895
1681A
Game with Cards
games
,
greedy
800
x16150
1680F
Lenient Vertex Cover
dfs and similar
,
divide and conquer
,
dsu
,
graphs
,
trees
2600
x262
1680E
Moving Chips
bitmasks
,
dp
,
greedy
2000
x2245
1680D
Dog Walking
brute force
,
greedy
,
math
2400
x655
1680C
Binary String
binary search
,
greedy
,
strings
,
two pointers
1600
x5508
1680B
Robots
implementation
800
x14513
1680A
Minimums and Maximums
brute force
,
math
800
x16556
1679F
Formalism for Formalism
bitmasks
,
dp
,
math
2600
x238
1679E
Typical Party in Dorm
bitmasks
,
combinatorics
,
dp
,
strings
2400
x612
1679D
Toss a Coin to Your Graph...
binary search
,
dfs and similar
,
dp
,
graphs
1900
x2417
1679C
Rooks Defenders
data structures
,
implementation
1400
x5935
1679B
Stone Age Problem
data structures
,
implementation
1200
x9827
1679A
AvtoBus
brute force
,
greedy
,
math
,
number theory
900
x13265
1678B2
Tokitsukaze and Good 01-String (hard version)
dp
,
greedy
,
implementation
1800
x4301
1678B1
Tokitsukaze and Good 01-String (easy version)
implementation
800
x12490
1678A
Tokitsukaze and All Zero Sequence
implementation
800
x14233
1677F
Tokitsukaze and Gems
dp
,
math
3500
x53
1677E
Tokitsukaze and Beautiful Subsegments
data structures
2900
x260
1677D
Tokitsukaze and Permutations
dp
,
math
2500
x702
1677C
Tokitsukaze and Two Colorful Tapes
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
1900
x2005
1677B
Tokitsukaze and Meeting
data structures
,
implementation
,
math
1700
x2487
1677A
Tokitsukaze and Strange Inequality
brute force
,
data structures
,
dp
1600
x5209
1676H2
Maximum Crossings (Hard Version)
data structures
,
divide and conquer
,
sortings
1500
x5207
1676H1
Maximum Crossings (Easy Version)
brute force
1400
x7496
1676G
White-Black Balanced Subtrees
dfs and similar
,
dp
,
graphs
,
trees
1300
x6796
1676F
Longest Strike
data structures
,
greedy
,
implementation
,
sortings
,
two pointers
1300
x8613
1676E
Eating Queries
binary search
,
greedy
,
sortings
1100
x13503
1676D
X-Sum
brute force
,
greedy
,
implementation
1000
x14221
1676C
Most Similar Words
brute force
,
greedy
,
implementation
,
implementation
,
math
,
strings
800
x19029
1676B
Equal Candies
greedy
,
math
,
sortings
800
x24844
1676A
Lucky?
implementation
800
x26428
1675G
Sorting Pancakes
dp
2300
x854
1675F
Vlad and Unfinished Business
dfs and similar
,
dp
,
greedy
,
trees
1800
x2611
1675E
Replace With the Previous, Minimize
dsu
,
greedy
,
strings
1500
x5744
1675D
Vertical Paths
graphs
,
implementation
,
trees
1300
x7519
1675C
Detective Task
implementation
1100
x11948
1675B
Make It Increasing
greedy
,
implementation
900
x15574
1675A
Food for Animals
greedy
,
math
800
x20781
1674G
Remove Directed Edges
dfs and similar
,
dp
,
graphs
2000
x1395
1674F
Desktop Rearrangement
data structures
,
greedy
,
implementation
1800
x3207
1674E
Breaking the Wall
binary search
,
brute force
,
constructive algorithms
,
greedy
,
math
2000
x4142
1674D
A-B-C Sort
constructive algorithms
,
implementation
,
sortings
1200
x9954
1674C
Infinite Replacement
combinatorics
,
implementation
,
strings
1000
x15012
1674B
Dictionary
combinatorics
,
math
800
x18504
1674A
Number Transformation
constructive algorithms
,
math
800
x18901
1673F
Anti-Theft Road Planning
bitmasks
,
constructive algorithms
,
divide and conquer
,
greedy
,
interactive
,
math
2400
x514
1673E
Power or XOR?
bitmasks
,
combinatorics
,
math
,
number theory
2500
x418
1673D
Lost Arithmetic Progression
combinatorics
,
math
,
number theory
1900
x2226
1673C
Palindrome Basis
brute force
,
dp
,
math
,
number theory
1500
x6891
1673B
A Perfectly Balanced String?
brute force
,
greedy
,
strings
1100
x10323
1673A
Subtle Substring Subtraction
games
,
greedy
,
strings
800
x15047
1672I
PermutationForces
data structures
,
greedy
3000
x57
1672H
Zigu Zagu
constructive algorithms
,
data structures
,
greedy
2700
x521
1672G
Cross Xor
constructive algorithms
,
graphs
,
math
,
matrices
3200
x149
1672F2
Checker for Array Shuffling
constructive algorithms
,
dfs and similar
,
graphs
2800
x518
1672F1
Array Shuffling
constructive algorithms
,
graphs
,
greedy
2000
x2085
1672E
notepad.exe
binary search
,
constructive algorithms
,
greedy
,
interactive
2200
x1588
1672D
Cyclic Rotation
constructive algorithms
,
greedy
,
implementation
,
two pointers
1700
x4165
1672C
Unequal Array
constructive algorithms
,
greedy
,
implementation
1100
x9439
1672B
I love AAAB
constructive algorithms
,
implementation
800
x12339
1672A
Log Chopping
games
,
implementation
,
math
800
x12852
1671F
Permutation Counting
brute force
,
combinatorics
,
dp
,
fft
,
math
2700
x179
1671E
Preorder
combinatorics
,
divide and conquer
,
dp
,
dsu
,
hashing
,
sortings
,
trees
2100
x1758
1671D
Insert a Progression
brute force
,
constructive algorithms
,
greedy
1600
x4668
1671C
Dolce Vita
binary search
,
brute force
,
greedy
,
math
1200
x10136
1671B
Consecutive Points Segment
brute force
,
math
,
sortings
1000
x13307
1671A
String Building
implementation
800
x16359
1670F
Jee, You See?
bitmasks
,
combinatorics
,
dp
2400
x524
1670E
Hemose on the Tree
bitmasks
,
constructive algorithms
,
dfs and similar
,
trees
2200
x1076
1670D
Very Suspicious
binary search
,
brute force
,
geometry
,
greedy
,
implementation
,
math
1700
x3267
1670C
Where is the Pizza?
data structures
,
dfs and similar
,
dsu
,
graphs
,
implementation
,
math
1400
x5789
1670B
Dorms War
brute force
,
implementation
,
strings
1100
x9033
1670A
Prof. Slim
greedy
,
implementation
,
sortings
800
x12278
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