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Codeforces Round 940 (Div. 2)
3 days
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Difficulty:
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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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Problems
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Status
Standings
Custom test
Problems
#
Name
570C
Replacement
constructive algorithms
,
data structures
,
implementation
1600
x8958
570B
Simple Game
constructive algorithms
,
games
,
greedy
,
implementation
,
math
1300
x15719
570A
Elections
implementation
1100
x13723
569A
Music
implementation
,
math
1500
x4738
568A
Primes or Palindromes?
brute force
,
implementation
,
math
,
number theory
1600
x4997
567B
Berland National Library
implementation
1300
x8326
567A
Lineland Mail
greedy
,
implementation
900
x30375
560B
Gerald is into Art
constructive algorithms
,
implementation
1200
x7818
560A
Currency System in Geraldion
implementation
,
sortings
1000
x16789
558D
Guess Your Way Out! II
data structures
,
implementation
,
sortings
2300
x1102
558B
Amr and The Large Array
implementation
1300
x7750
558A
Lala Land and Apple Trees
brute force
,
implementation
,
sortings
1100
x10143
557B
Pasha and Tea
constructive algorithms
,
implementation
,
math
,
sortings
1500
x7073
557A
Ilya and Diplomas
greedy
,
implementation
,
math
1100
x8194
556B
Case of Fake Numbers
brute force
,
implementation
1100
x7865
555D
Case of a Top Secret
binary search
,
implementation
,
math
2500
x856
555A
Case of Matryoshkas
implementation
1500
x6486
553B
Kyoya and Permutation
binary search
,
combinatorics
,
constructive algorithms
,
greedy
,
implementation
,
math
1900
x2094
552E
Vanya and Brackets
brute force
,
dp
,
expression parsing
,
greedy
,
implementation
,
strings
2100
x1406
552B
Vanya and Books
implementation
,
math
1200
x15172
552A
Vanya and Table
implementation
,
math
1000
x9323
551E
GukiZ and GukiZiana
binary search
,
data structures
,
implementation
2500
x1647
551D
GukiZ and Binary Operations
combinatorics
,
implementation
,
math
,
matrices
,
number theory
2100
x1719
551B
ZgukistringZ
brute force
,
constructive algorithms
,
implementation
,
strings
1800
x3754
551A
GukiZ and Contest
brute force
,
implementation
,
sortings
800
x15977
550E
Brackets in Implications
constructive algorithms
,
greedy
,
implementation
,
math
2200
x1375
550D
Regular Bridge
constructive algorithms
,
graphs
,
implementation
1900
x3233
550A
Two Substrings
brute force
,
dp
,
greedy
,
implementation
,
strings
1500
x36068
549D
Haar Features
greedy
,
implementation
1900
x2121
549A
Face Detection
implementation
,
strings
900
x9333
548B
Mike and Fun
brute force
,
dp
,
greedy
,
implementation
1400
x8255
548A
Mike and Fax
brute force
,
implementation
,
strings
1100
x9821
547A
Mike and Frog
brute force
,
greedy
,
implementation
,
math
2200
x2309
546B
Soldier and Badges
brute force
,
greedy
,
implementation
,
sortings
1200
x17140
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x166150
545D
Queue
greedy
,
implementation
,
sortings
1300
x23870
545A
Toy Cars
implementation
900
x11399
544B
Sea and Islands
constructive algorithms
,
implementation
1400
x7794
544A
Set of Strings
implementation
,
strings
1100
x7696
540E
Infinite Inversions
binary search
,
data structures
,
implementation
,
sortings
,
trees
2100
x2000
540B
School Marks
greedy
,
implementation
1700
x4592
540A
Combination Lock
implementation
800
x31382
538D
Weird Chess
brute force
,
constructive algorithms
,
implementation
1800
x2404
538C
Tourist's Notes
binary search
,
brute force
,
greedy
,
implementation
,
math
1600
x5752
538B
Quasi Binary
constructive algorithms
,
dp
,
greedy
,
implementation
1400
x17549
538A
Cutting Banner
brute force
,
implementation
1400
x7045
535B
Tavas and SaDDas
bitmasks
,
brute force
,
combinatorics
,
implementation
1100
x21504
535A
Tavas and Nafas
brute force
,
implementation
1000
x11796
534E
Berland Local Positioning System
constructive algorithms
,
greedy
,
hashing
,
implementation
2400
x340
534A
Exam
constructive algorithms
,
implementation
,
math
1100
x11997
533C
Board Game
games
,
greedy
,
implementation
,
math
1700
x2137
527D
Clique Problem
data structures
,
dp
,
greedy
,
implementation
,
sortings
1800
x4637
527C
Glass Carving
binary search
,
data structures
,
implementation
1500
x6638
527A
Playing with Paper
implementation
,
math
1100
x14068
526E
Transmitting Levels
dp
,
implementation
2400
x1051
526B
Om Nom and Dark Park
dfs and similar
,
greedy
,
implementation
1400
x4462
526A
King of Thieves
brute force
,
implementation
1300
x4722
524A
Возможно, вы знаете этих людей?
implementation
1600
x1391
523D
Statistics of Recompressing Videos
*special problem
,
data structures
,
implementation
1600
x2230
523B
Mean Requests
*special problem
,
implementation
1500
x938
523A
Rotate, Flip and Zoom
*special problem
,
implementation
1200
x2564
522B
Photo to Remember
*special problem
,
data structures
,
dp
,
implementation
1100
x8634
520D
Cubes
games
,
greedy
,
implementation
2100
x1530
520B
Two Buttons
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
,
shortest paths
1400
x47610
520A
Pangram
implementation
,
strings
800
x88935
519C
A and B and Team Training
greedy
,
implementation
,
math
,
number theory
1300
x19298
519B
A and B and Compilation Errors
data structures
,
implementation
,
sortings
1100
x37528
519A
A and B and Chess
implementation
900
x18530
518F
Pasha and Pipe
binary search
,
brute force
,
combinatorics
,
dp
,
implementation
2300
x342
518E
Arthur and Questions
greedy
,
implementation
,
math
,
ternary search
2200
x904
518C
Anya and Smartphone
constructive algorithms
,
data structures
,
implementation
1600
x5916
518B
Tanya and Postcard
greedy
,
implementation
,
strings
1400
x7781
514B
Han Solo and Lazer Gun
brute force
,
data structures
,
geometry
,
implementation
,
math
1400
x20081
514A
Chewbaсca and Number
greedy
,
implementation
1200
x45106
510A
Fox And Snake
implementation
800
x76001
509C
Sums of Digits
dp
,
greedy
,
implementation
2000
x1991
509B
Painting Pebbles
constructive algorithms
,
greedy
,
implementation
1300
x9508
509A
Maximum in Table
brute force
,
implementation
800
x37137
507D
The Maths Lecture
dp
,
implementation
2200
x1676
507C
Guess Your Way Out!
implementation
,
math
,
trees
1700
x4269
507A
Amr and Music
greedy
,
implementation
,
sortings
1000
x16915
505A
Mr. Kitayuta's Gift
brute force
,
implementation
,
strings
1100
x6587
501E
Misha and Palindrome Degree
binary search
,
combinatorics
,
implementation
2500
x715
501A
Contest
implementation
900
x21886
500C
New Year Book Reading
constructive algorithms
,
greedy
,
implementation
,
math
1600
x5737
500A
New Year Transportation
dfs and similar
,
graphs
,
implementation
1000
x49941
499B
Lecture
implementation
,
strings
1000
x37275
499A
Watching a movie
greedy
,
implementation
1000
x13692
496C
Removing Columns
brute force
,
constructive algorithms
,
implementation
1500
x7545
496B
Secret Combination
brute force
,
constructive algorithms
,
implementation
1500
x5788
496A
Minimum Difficulty
brute force
,
implementation
,
math
900
x16063
495A
Digital Counter
implementation
1100
x8275
493C
Vasya and Basketball
binary search
,
brute force
,
data structures
,
implementation
,
sortings
,
two pointers
1600
x6649
493B
Vasya and Wrestling
implementation
1400
x12968
493A
Vasya and Football
implementation
1300
x6016
492D
Vanya and Computer Game
binary search
,
implementation
,
math
,
sortings
1800
x3113
492B
Vanya and Lanterns
binary search
,
implementation
,
math
,
sortings
1200
x70694
492A
Vanya and Cubes
implementation
800
x46357
491A
Up the hill
constructive algorithms
,
implementation
1000
x2808
490E
Restoring Increasing Sequence
binary search
,
brute force
,
greedy
,
implementation
2000
x1513
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