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Codeforces Round 937 (Div. 4)
00:28:38
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data structures
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
1349A
Orac and LCM
data structures
,
math
,
number theory
1600
x15738
1234D
Distinct Characters Queries
data structures
1600
x13984
1374E1
Reading Books (easy version)
data structures
,
greedy
,
sortings
1600
x13447
343B
Alternating Current
data structures
,
greedy
,
implementation
1600
x12837
1779C
Least Prefix Sum
data structures
,
greedy
1600
x11649
1593E
Gardener and Tree
brute force
,
data structures
,
dfs and similar
,
greedy
,
implementation
,
trees
1600
x11474
1294D
MEX maximizing
data structures
,
greedy
,
implementation
,
math
1600
x11181
1856C
To Become Max
binary search
,
brute force
,
data structures
,
dp
1600
x10715
1843E
Tracking Segments
binary search
,
brute force
,
data structures
,
two pointers
1600
x10653
1748C
Zero-Sum Prefixes
brute force
,
data structures
,
dp
,
greedy
,
implementation
1600
x10259
1857F
Sum and Product
binary search
,
data structures
,
math
1600
x10140
1175B
Catch Overflow!
data structures
,
expression parsing
,
implementation
1600
x10019
1722E
Counting Rectangles
brute force
,
data structures
,
dp
,
implementation
1600
x9785
1849C
Binary String Copying
binary search
,
brute force
,
data structures
,
hashing
,
strings
1600
x9606
1862E
Kolya and Movie Theatre
constructive algorithms
,
data structures
,
greedy
1600
x9316
1196D2
RGB Substring (hard version)
data structures
,
dp
,
implementation
,
two pointers
1600
x9267
1861C
Queries for the Array
data structures
,
dfs and similar
,
implementation
,
strings
,
trees
1600
x9252
1041C
Coffee Break
binary search
,
data structures
,
greedy
,
two pointers
1600
x9184
1198B
Welfare State
binary search
,
brute force
,
data structures
,
sortings
1600
x9120
1829G
Hits Different
data structures
,
dp
,
implementation
,
math
1600
x9105
1498C
Planar Reflections
brute force
,
data structures
,
dp
1600
x9078
1140C
Playlist
brute force
,
data structures
,
sortings
1600
x9071
704A
Thor
brute force
,
data structures
,
implementation
1600
x8896
1461D
Divide and Summarize
binary search
,
brute force
,
data structures
,
divide and conquer
,
implementation
,
sortings
1600
x8818
570C
Replacement
constructive algorithms
,
data structures
,
implementation
1600
x8809
722C
Destroying Array
data structures
,
dsu
1600
x8707
616D
Longest k-Good Segment
binary search
,
data structures
,
two pointers
1600
x8583
1523C
Compression and Expansion
brute force
,
data structures
,
greedy
,
implementation
,
trees
1600
x8549
1714D
Color with Occurrences
brute force
,
data structures
,
dp
,
greedy
,
strings
1600
x8445
1290A
Mind Control
brute force
,
data structures
,
implementation
1600
x8237
1677A
Tokitsukaze and Strange Inequality
brute force
,
data structures
,
dp
1600
x8029
1566D2
Seating Arrangements (hard version)
data structures
,
greedy
,
implementation
,
sortings
,
two pointers
1600
x7655
1840E
Character Blocking
data structures
,
hashing
,
implementation
1600
x7378
1878D
Reverse Madness
data structures
,
greedy
1600
x7332
1941E
Rudolf and k Bridges
binary search
,
data structures
,
dp
,
two pointers
1600
x7274
659E
New Reform
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
1600
x7254
923B
Producing Snow
binary search
,
data structures
1600
x7138
681C
Heap Operations
constructive algorithms
,
data structures
,
greedy
1600
x7090
1163B2
Cat Party (Hard Edition)
data structures
,
implementation
1600
x6858
493C
Vasya and Basketball
binary search
,
brute force
,
data structures
,
implementation
,
sortings
,
two pointers
1600
x6635
962D
Merge Equals
data structures
,
implementation
1600
x6631
283A
Cows and Sequence
constructive algorithms
,
data structures
,
implementation
1600
x6439
777C
Alyona and Spreadsheet
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
two pointers
1600
x6248
1227D1
Optimal Subsequences (Easy Version)
data structures
,
greedy
1600
x6096
518C
Anya and Smartphone
constructive algorithms
,
data structures
,
implementation
1600
x5909
573B
Bear and Blocks
binary search
,
data structures
,
dp
,
math
1600
x5606
383A
Milking cows
data structures
,
greedy
1600
x5183
375B
Maximum Submatrix 2
data structures
,
dp
,
implementation
,
sortings
1600
x4930
364A
Matrix
combinatorics
,
data structures
,
implementation
1600
x4577
847B
Preparing for Merge Sort
binary search
,
data structures
1600
x4561
733D
Kostya the Sculptor
data structures
,
hashing
1600
x4109
858D
Polycarp's phone book
data structures
,
implementation
,
sortings
1600
x3674
1252C
Even Path
data structures
,
implementation
1600
x3614
830B
Cards Sorting
data structures
,
implementation
,
sortings
1600
x2739
253C
Text Editor
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1600
x2502
523D
Statistics of Recompressing Videos
*special problem
,
data structures
,
implementation
1600
x2225
156B
Suspects
constructive algorithms
,
data structures
,
implementation
1600
x2168
637D
Running with Obstacles
*special problem
,
data structures
,
dp
,
greedy
1600
x1934
466C
Number of Ways
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x34223
339D
Xenia and Bit Operations
data structures
,
trees
1700
x23302
349B
Color the Fence
data structures
,
dp
,
greedy
,
implementation
1700
x13396
1381A2
Prefix Flip (Hard Version)
constructive algorithms
,
data structures
,
implementation
,
strings
,
two pointers
1700
x12687
1343D
Constant Palindrome Sum
brute force
,
data structures
,
greedy
,
two pointers
1700
x12144
1474C
Array Destruction
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
,
sortings
1700
x12090
1333C
Eugene and an array
binary search
,
data structures
,
implementation
,
two pointers
1700
x12049
1626C
Monsters And Spells
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
math
,
two pointers
1700
x10523
1700C
Helping the Nature
constructive algorithms
,
data structures
,
greedy
1700
x10364
1335E1
Three Blocks Palindrome (easy version)
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x10349
1695C
Zero Path
brute force
,
data structures
,
dp
,
graphs
,
greedy
,
shortest paths
1700
x10214
385C
Bear and Prime Numbers
binary search
,
brute force
,
data structures
,
dp
,
implementation
,
math
,
number theory
1700
x9311
1473D
Program
data structures
,
dp
,
implementation
,
strings
1700
x9229
567C
Geometric Progression
binary search
,
data structures
,
dp
1700
x9224
1430D
String Deletion
binary search
,
data structures
,
greedy
,
two pointers
1700
x8627
1619E
MEX and Increments
constructive algorithms
,
data structures
,
dp
,
greedy
,
implementation
,
math
,
sortings
1700
x8541
1598D
Training Session
combinatorics
,
data structures
,
geometry
,
implementation
,
math
1700
x8320
1715C
Monoblock
combinatorics
,
data structures
,
implementation
,
math
1700
x8239
1061C
Multiplicity
data structures
,
dp
,
implementation
,
math
,
number theory
1700
x8216
1709D
Rorororobot
binary search
,
data structures
,
greedy
,
math
1700
x7975
1157E
Minimum Array
binary search
,
data structures
,
greedy
1700
x7951
1497E1
Square-Free Division (easy version)
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
1700
x7944
1702F
Equate Multisets
constructive algorithms
,
data structures
,
greedy
,
math
,
number theory
1700
x7811
1491C
Pekora and Trampoline
brute force
,
data structures
,
dp
,
greedy
,
implementation
1700
x7672
1472E
Correct Placement
binary search
,
data structures
,
dp
,
sortings
,
two pointers
1700
x7656
1278C
Berry Jam
data structures
,
dp
,
greedy
,
implementation
1700
x7526
1779D
Boris and His Amazing Haircut
constructive algorithms
,
data structures
,
dp
,
dsu
,
greedy
,
sortings
1700
x7371
1257D
Yet Another Monster Killing Problem
binary search
,
data structures
,
dp
,
greedy
,
sortings
,
two pointers
1700
x7161
1185C2
Exam in BerSU (hard version)
brute force
,
data structures
,
greedy
,
math
1700
x7117
1714G
Path Prefixes
binary search
,
data structures
,
dfs and similar
,
trees
1700
x6991
1692H
Gambling
data structures
,
dp
,
greedy
,
math
1700
x6928
1644D
Cross Coloring
data structures
,
implementation
,
math
1700
x6922
1583C
Omkar and Determination
data structures
,
dp
1700
x6762
1731D
Valiant's New Map
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x6589
1833F
Ira and Flamenco
combinatorics
,
constructive algorithms
,
data structures
,
implementation
,
math
,
sortings
,
two pointers
1700
x6500
1000C
Covered Points Count
data structures
,
implementation
,
sortings
1700
x6388
1608C
Game Master
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
two pointers
1700
x6339
1413D
Shurikens
data structures
,
greedy
,
implementation
1700
x6291
1073D
Berland Fair
binary search
,
brute force
,
data structures
,
greedy
1700
x6283
1822G1
Magic Triples (Easy Version)
brute force
,
data structures
,
math
,
number theory
1700
x6280
1579E2
Array Optimization by Deque
data structures
,
greedy
1700
x6279
1864D
Matrix Cascade
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
math
1700
x6217
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