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Codeforces Round 937 (Div. 4)
01:45:52
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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
797C
Minimal string
data structures
,
greedy
,
strings
1700
x6201
1562D1
Two Hundred Twenty One (easy version)
data structures
,
dp
,
math
1700
x6149
622C
Not Equal on a Segment
data structures
,
implementation
1700
x6131
1930C
Lexicographically Largest
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
1700
x6087
460C
Present
binary search
,
data structures
,
greedy
1700
x5994
1066E
Binary Numbers AND Sum
data structures
,
implementation
,
math
1700
x5947
1792D
Fixed Prefix Permutations
binary search
,
bitmasks
,
data structures
,
hashing
,
math
,
sortings
1700
x5778
1041D
Glider
binary search
,
data structures
,
two pointers
1700
x5760
1561D1
Up the Strip (simplified version)
brute force
,
data structures
,
dp
,
math
,
number theory
1700
x5337
1884C
Medium Design
brute force
,
data structures
,
dp
,
greedy
,
sortings
1700
x5237
1735D
Meta-set
brute force
,
combinatorics
,
data structures
,
hashing
,
math
1700
x5202
1896D
Ones and Twos
binary search
,
data structures
,
divide and conquer
,
math
,
two pointers
1700
x4963
1310A
Recommendations
data structures
,
greedy
,
sortings
1700
x4863
567D
One-Dimensional Battle Ships
binary search
,
data structures
,
greedy
,
sortings
1700
x4601
29C
Mail Stamps
data structures
,
dfs and similar
,
graphs
,
implementation
1700
x4462
229B
Planets
binary search
,
data structures
,
graphs
,
shortest paths
1700
x4424
900C
Remove Extra One
brute force
,
data structures
,
math
1700
x4395
1182C
Beautiful Lyrics
data structures
,
greedy
,
strings
1700
x4373
1677B
Tokitsukaze and Meeting
data structures
,
implementation
,
math
1700
x3985
1023D
Array Restoration
constructive algorithms
,
data structures
1700
x3935
827A
String Reconstruction
data structures
,
greedy
,
sortings
,
strings
1700
x3921
631C
Report
data structures
,
sortings
1700
x3669
924C
Riverside Curio
data structures
,
dp
,
greedy
1700
x3665
1580A
Portal
brute force
,
data structures
,
dp
,
greedy
,
implementation
1700
x3519
605B
Lazy Student
constructive algorithms
,
data structures
,
graphs
1700
x3375
818D
Multicolored Cars
data structures
,
implementation
1700
x3371
670E
Correct Bracket Sequence Editor
data structures
,
dsu
,
strings
1700
x3130
627B
Factory Repairs
data structures
1700
x2633
644B
Processing Queries
*special problem
,
constructive algorithms
,
data structures
,
two pointers
1700
x2590
223A
Bracket Sequence
data structures
,
expression parsing
,
implementation
1700
x2477
101B
Buses
binary search
,
data structures
,
dp
1700
x2467
56C
Corporation Mail
data structures
,
expression parsing
,
implementation
1700
x1115
159E
Zebra Tower
*special problem
,
data structures
,
greedy
,
sortings
1700
x986
271D
Good Substrings
data structures
,
strings
1800
x10078
459D
Pashmak and Parmida's problem
data structures
,
divide and conquer
,
sortings
1800
x9399
220B
Little Elephant and Array
constructive algorithms
,
data structures
1800
x9238
1548B
Integers Have Friends
binary search
,
data structures
,
divide and conquer
,
math
,
number theory
,
two pointers
1800
x9172
706D
Vasiliy's Multiset
binary search
,
bitmasks
,
data structures
,
trees
1800
x9142
1572A
Book
binary search
,
brute force
,
data structures
,
dp
,
graphs
,
implementation
,
sortings
1800
x8446
1335E2
Three Blocks Palindrome (hard version)
brute force
,
data structures
,
dp
,
two pointers
1800
x7896
1535D
Playoff Tournament
data structures
,
dfs and similar
,
dp
,
implementation
,
trees
1800
x7430
1420D
Rescue Nibel!
combinatorics
,
data structures
,
sortings
1800
x7263
1845D
Rating System
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
math
,
two pointers
1800
x7138
1462F
The Treasure of The Segments
binary search
,
data structures
,
greedy
1800
x6590
1935C
Messenger in MAC
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1800
x6509
1859D
Andrey and Escape from Capygrad
binary search
,
data structures
,
dp
,
dsu
,
greedy
,
sortings
1800
x6406
519D
A and B and Interesting Substrings
data structures
,
dp
,
two pointers
1800
x6223
482B
Interesting Array
constructive algorithms
,
data structures
,
trees
1800
x6113
1648B
Integral Array
brute force
,
constructive algorithms
,
data structures
,
math
1800
x6097
1611F
ATM and Students
binary search
,
data structures
,
two pointers
1800
x6068
1734D
Slime Escape
data structures
,
dp
,
greedy
,
two pointers
1800
x5924
1154E
Two Teams
data structures
,
implementation
,
sortings
1800
x5855
776C
Molly's Chemicals
binary search
,
brute force
,
data structures
,
implementation
,
math
1800
x5721
1801B
Buying gifts
data structures
,
greedy
,
sortings
1800
x5663
1042D
Petya and Array
data structures
,
divide and conquer
,
two pointers
1800
x5636
1630B
Range and Partition
binary search
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
1800
x5446
1923D
Slimes
binary search
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
1800
x5441
1691D
Max GEQ Sum
binary search
,
constructive algorithms
,
data structures
,
divide and conquer
,
implementation
,
two pointers
1800
x5366
1450D
Rating Compression
binary search
,
data structures
,
greedy
,
implementation
,
two pointers
1800
x5266
371D
Vessels
data structures
,
dsu
,
implementation
,
trees
1800
x5169
1083A
The Fair Nut and the Best Path
data structures
,
dp
,
trees
1800
x5112
1843F1
Omsk Metro (simple version)
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
trees
1800
x4862
1249D2
Too Many Segments (hard version)
data structures
,
greedy
,
sortings
1800
x4825
1674F
Desktop Rearrangement
data structures
,
greedy
,
implementation
1800
x4801
1290B
Irreducible Anagrams
binary search
,
constructive algorithms
,
data structures
,
strings
,
two pointers
1800
x4795
527D
Clique Problem
data structures
,
dp
,
greedy
,
implementation
,
sortings
1800
x4608
913D
Too Easy Problems
binary search
,
brute force
,
data structures
,
greedy
,
sortings
1800
x4485
280B
Maximum Xor Secondary
data structures
,
implementation
,
two pointers
1800
x4340
1286B
Numbers on Tree
constructive algorithms
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
1800
x4315
1442B
Identify the Operations
combinatorics
,
data structures
,
dsu
,
greedy
,
implementation
1800
x4283
1227D2
Optimal Subsequences (Hard Version)
data structures
,
greedy
1800
x4206
140C
New Year Snowmen
binary search
,
data structures
,
greedy
1800
x4181
923C
Perfect Security
data structures
,
greedy
,
strings
,
trees
1800
x4104
1740E
Hanging Hearts
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
greedy
,
trees
1800
x4052
69E
Subsegments
data structures
,
implementation
1800
x3998
652D
Nested Segments
data structures
,
sortings
1800
x3761
1759F
All Possible Digits
binary search
,
data structures
,
greedy
,
math
,
number theory
1800
x3643
1904D2
Set To Max (Hard Version)
constructive algorithms
,
data structures
,
divide and conquer
,
greedy
,
implementation
,
sortings
1800
x3616
799C
Fountains
binary search
,
data structures
,
implementation
1800
x3563
675D
Tree Construction
data structures
,
trees
1800
x3531
863D
Yet Another Array Queries Problem
data structures
,
implementation
1800
x3113
725D
Contest Balloons
data structures
,
greedy
1800
x2659
846C
Four Segments
brute force
,
data structures
,
dp
1800
x2600
845D
Driving Test
data structures
,
dp
,
greedy
1800
x2320
846F
Random Query
data structures
,
math
,
probabilities
,
two pointers
1800
x2176
79C
Beaver
data structures
,
dp
,
greedy
,
hashing
,
strings
,
two pointers
1800
x1709
1402A
Fancy Fence
*special problem
,
data structures
,
dsu
,
implementation
,
math
,
sortings
1800
x1122
174C
Range Increments
data structures
,
greedy
1800
x1061
802B
Heidi and Library (medium)
data structures
,
greedy
1800
x1004
66C
Petya and File System
data structures
,
implementation
1800
x989
85B
Embassy Queue
data structures
,
greedy
1800
x954
46D
Parking Lot
data structures
,
implementation
1800
x952
100G
Name the album
*special problem
,
data structures
,
implementation
1800
x107
5C
Longest Regular Bracket Sequence
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
,
strings
1900
x12418
577B
Modulo Sum
combinatorics
,
data structures
,
dp
,
two pointers
1900
x11323
61E
Enemy is weak
data structures
,
trees
1900
x9831
1400D
Zigzags
brute force
,
combinatorics
,
data structures
,
math
,
two pointers
1900
x9715
1354D
Multiset
binary search
,
data structures
1900
x8178
547B
Mike and Feet
binary search
,
data structures
,
dp
,
dsu
1900
x8104
1620E
Replace the Numbers
constructive algorithms
,
data structures
,
dsu
,
implementation
1900
x7642
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