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Codeforces Round 940 (Div. 2) and CodeCraft-23
2 days
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Difficulty:
—
implementation
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
57B
Martian Architecture
implementation
1600
x986
234E
Champions' League
implementation
1600
x980
28A
Bender Problem
implementation
1600
x767
1431C
Black Friday
*special problem
,
implementation
1600
x691
1910C
Poisonous Swamp
*special problem
,
*special problem
,
implementation
,
implementation
1600
x558
649D
Дефрагментация памяти
constructive algorithms
,
greedy
,
implementation
1600
x342
64C
Table
*special problem
,
greedy
,
implementation
,
math
1600
x331
188G
Array Sorting
*special problem
,
implementation
1600
x324
72H
Reverse It!
*special problem
,
implementation
1600
x258
1365D
Solve The Maze
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
shortest paths
1700
x16054
467C
George and Job
dp
,
implementation
1700
x14024
349B
Color the Fence
data structures
,
dp
,
greedy
,
implementation
1700
x13455
276D
Little Girl and Maximum XOR
bitmasks
,
dp
,
greedy
,
implementation
,
math
1700
x12886
1381A2
Prefix Flip (Hard Version)
constructive algorithms
,
data structures
,
implementation
,
strings
,
two pointers
1700
x12720
1324E
Sleeping Schedule
dp
,
implementation
1700
x12373
1474C
Array Destruction
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
,
sortings
1700
x12152
1333C
Eugene and an array
binary search
,
data structures
,
implementation
,
two pointers
1700
x12085
486C
Palindrome Transformation
brute force
,
greedy
,
implementation
1700
x11471
1467B
Hills And Valleys
brute force
,
implementation
1700
x10689
1626C
Monsters And Spells
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
math
,
two pointers
1700
x10569
1550C
Manhattan Subarrays
brute force
,
geometry
,
greedy
,
implementation
1700
x9913
1478C
Nezzar and Symmetric Array
implementation
,
math
,
sortings
1700
x9470
385C
Bear and Prime Numbers
binary search
,
brute force
,
data structures
,
dp
,
implementation
,
math
,
number theory
1700
x9344
1473D
Program
data structures
,
dp
,
implementation
,
strings
1700
x9278
1462E2
Close Tuples (hard version)
binary search
,
combinatorics
,
implementation
,
math
,
sortings
,
two pointers
1700
x9176
1619E
MEX and Increments
constructive algorithms
,
data structures
,
dp
,
greedy
,
implementation
,
math
,
sortings
1700
x8615
1476D
Journey
dfs and similar
,
dp
,
dsu
,
implementation
1700
x8371
1598D
Training Session
combinatorics
,
data structures
,
geometry
,
implementation
,
math
1700
x8370
1061C
Multiplicity
data structures
,
dp
,
implementation
,
math
,
number theory
1700
x8311
1715C
Monoblock
combinatorics
,
data structures
,
implementation
,
math
1700
x8298
1268A
Long Beautiful Integer
constructive algorithms
,
greedy
,
implementation
,
strings
1700
x8273
382C
Arithmetic Progression
implementation
,
sortings
1700
x8142
279C
Ladder
dp
,
implementation
,
two pointers
1700
x8034
1491C
Pekora and Trampoline
brute force
,
data structures
,
dp
,
greedy
,
implementation
1700
x7702
1278C
Berry Jam
data structures
,
dp
,
greedy
,
implementation
1700
x7587
1850H
The Third Letter
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
1700
x7416
1835A
k-th equality
brute force
,
implementation
,
math
1700
x7378
1114C
Trailing Loves (or L'oeufs?)
brute force
,
implementation
,
math
,
number theory
1700
x7176
1203D2
Remove the Substring (hard version)
binary search
,
greedy
,
implementation
,
two pointers
1700
x7010
1644D
Cross Coloring
data structures
,
implementation
,
math
1700
x6961
1660F1
Promising String (easy version)
brute force
,
implementation
,
math
,
strings
1700
x6951
1950F
0, 1, 2, Tree!
bitmasks
,
brute force
,
greedy
,
implementation
,
trees
1700
x6898
1833F
Ira and Flamenco
combinatorics
,
constructive algorithms
,
data structures
,
implementation
,
math
,
sortings
,
two pointers
1700
x6599
1722F
L-shapes
dfs and similar
,
implementation
1700
x6491
1185D
Extra Element
implementation
,
math
1700
x6419
1000C
Covered Points Count
data structures
,
implementation
,
sortings
1700
x6415
1313B
Different Rules
constructive algorithms
,
greedy
,
implementation
,
math
1700
x6406
1868B1
Candy Party (Easy Version)
bitmasks
,
constructive algorithms
,
graphs
,
greedy
,
implementation
,
math
1700
x6376
1413D
Shurikens
data structures
,
greedy
,
implementation
1700
x6322
622C
Not Equal on a Segment
data structures
,
implementation
1700
x6168
1955E
Long Inversions
brute force
,
greedy
,
implementation
,
sortings
1700
x6078
216B
Forming Teams
dfs and similar
,
implementation
1700
x6059
1901D
Yet Another Monster Fight
binary search
,
dp
,
greedy
,
implementation
,
math
1700
x6056
1111B
Average Superhero Gang Power
brute force
,
implementation
,
math
1700
x6033
1292B
Aroma's Search
brute force
,
constructive algorithms
,
geometry
,
greedy
,
implementation
1700
x6005
1066E
Binary Numbers AND Sum
data structures
,
implementation
,
math
1700
x5982
1453C
Triangles
greedy
,
implementation
1700
x5970
1672D
Cyclic Rotation
constructive algorithms
,
greedy
,
implementation
,
two pointers
1700
x5969
20A
BerOS file system
implementation
1700
x5913
1006D
Two Strings Swaps
implementation
1700
x5823
1807F
Bouncy Ball
brute force
,
dfs and similar
,
implementation
1700
x5813
815A
Karen and Game
brute force
,
greedy
,
implementation
1700
x5570
1118C
Palindromic Matrix
constructive algorithms
,
implementation
1700
x5498
625A
Guest From the Past
implementation
,
math
1700
x5348
1085D
Minimum Diameter Tree
constructive algorithms
,
implementation
,
trees
1700
x5279
1280A
Cut and Paste
implementation
,
math
1700
x5145
1254A
Feeding Chicken
constructive algorithms
,
greedy
,
implementation
1700
x4980
1670D
Very Suspicious
binary search
,
brute force
,
geometry
,
greedy
,
implementation
,
math
1700
x4935
479D
Long Jumps
binary search
,
greedy
,
implementation
1700
x4704
540B
School Marks
greedy
,
implementation
1700
x4593
29C
Mail Stamps
data structures
,
dfs and similar
,
graphs
,
implementation
1700
x4519
983A
Finite or not?
implementation
,
math
1700
x4447
789B
Masha and geometric depression
brute force
,
implementation
,
math
1700
x4340
718A
Efim and Strange Grade
dp
,
implementation
,
math
1700
x4316
936A
Save Energy!
binary search
,
implementation
,
math
1700
x4311
507C
Guess Your Way Out!
implementation
,
math
,
trees
1700
x4273
978G
Petya's Exams
greedy
,
implementation
,
sortings
1700
x4183
617D
Polyline
constructive algorithms
,
implementation
1700
x4127
1677B
Tokitsukaze and Meeting
data structures
,
implementation
,
math
1700
x4005
1118E
Yet Another Ball Problem
constructive algorithms
,
implementation
1700
x3898
590A
Median Smoothing
implementation
1700
x3892
758C
Unfair Poll
binary search
,
constructive algorithms
,
implementation
,
math
1700
x3817
960C
Subsequence Counting
bitmasks
,
constructive algorithms
,
greedy
,
implementation
1700
x3805
439C
Devu and Partitioning of the Array
brute force
,
constructive algorithms
,
implementation
,
number theory
1700
x3792
990D
Graph And Its Complement
constructive algorithms
,
graphs
,
implementation
1700
x3753
954C
Matrix Walk
implementation
1700
x3683
734D
Anton and Chess
implementation
1700
x3682
321A
Ciel and Robot
binary search
,
implementation
,
math
1700
x3547
1580A
Portal
brute force
,
data structures
,
dp
,
greedy
,
implementation
1700
x3536
581D
Three Logos
bitmasks
,
brute force
,
constructive algorithms
,
geometry
,
implementation
,
math
1700
x3406
818D
Multicolored Cars
data structures
,
implementation
1700
x3380
160C
Find Pair
implementation
,
math
,
sortings
1700
x3378
451C
Predict Outcome of the Game
brute force
,
implementation
,
math
1700
x3296
931C
Laboratory Work
implementation
,
math
1700
x3289
198A
About Bacteria
implementation
,
math
1700
x3099
405D
Toy Sum
greedy
,
implementation
,
math
1700
x3081
14C
Four Segments
brute force
,
constructive algorithms
,
geometry
,
implementation
,
math
1700
x3034
281B
Nearest Fraction
brute force
,
implementation
,
two pointers
1700
x2920
260C
Balls and Boxes
constructive algorithms
,
greedy
,
implementation
1700
x2916
275B
Convex Shape
constructive algorithms
,
implementation
1700
x2781
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