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Codeforces Round 940 (Div. 2)
3 days
Register now »
*has extra registration
→ Filter Problems
Difficulty:
—
two pointers
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
381A
Sereja and Dima
greedy
,
implementation
,
two pointers
800
x59611
1791C
Prepend and Append
implementation
,
two pointers
800
x39906
1462A
Favorite Sequence
implementation
,
two pointers
800
x39718
1843A
Sasha and Array Coloring
greedy
,
sortings
,
two pointers
800
x32785
1840A
Cipher Shifer
implementation
,
strings
,
two pointers
800
x32363
1873D
1D Eraser
greedy
,
implementation
,
two pointers
800
x32240
1851B
Parity Sort
greedy
,
sortings
,
two pointers
800
x27861
1843B
Long Long
greedy
,
math
,
two pointers
800
x27858
1646B
Quality vs Quantity
brute force
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
800
x20815
1746B
Rebellion
constructive algorithms
,
greedy
,
two pointers
800
x16683
1689A
Lex String
brute force
,
greedy
,
implementation
,
sortings
,
two pointers
800
x16348
1789B
Serval and Inversion Magic
brute force
,
implementation
,
strings
,
two pointers
800
x15720
1896B
AB Flipping
greedy
,
strings
,
two pointers
900
x13200
1359B
New Theatre Square
brute force
,
dp
,
greedy
,
implementation
,
two pointers
1000
x27010
1690D
Black and White Stripe
implementation
,
two pointers
1000
x26460
1840C
Ski Resort
combinatorics
,
math
,
two pointers
1000
x24260
978C
Letters
binary search
,
implementation
,
two pointers
1000
x24179
1744C
Traffic Light
binary search
,
implementation
,
two pointers
1000
x23924
1760D
Challenging Valleys
implementation
,
two pointers
1000
x22200
1691B
Shoe Shuffling
constructive algorithms
,
greedy
,
implementation
,
two pointers
1000
x20965
1847B
Hamon Odyssey
bitmasks
,
greedy
,
two pointers
1000
x18965
1251A
Broken Keyboard
brute force
,
strings
,
two pointers
1000
x18733
1669F
Eating Candies
binary search
,
data structures
,
greedy
,
two pointers
1100
x22775
1547C
Pair Programming
greedy
,
two pointers
1100
x21943
1921D
Very Different Array
data structures
,
greedy
,
sortings
,
two pointers
1100
x19742
1832B
Maximum Sum
brute force
,
sortings
,
two pointers
1100
x19397
1899C
Yarik and Array
dp
,
greedy
,
two pointers
1100
x17801
1656B
Subtract Operation
data structures
,
greedy
,
math
,
two pointers
1100
x17539
1827A
Counting Orders
combinatorics
,
math
,
sortings
,
two pointers
1100
x17294
1741C
Minimize the Thickness
brute force
,
greedy
,
math
,
two pointers
1100
x17110
1610B
Kalindrome Array
greedy
,
two pointers
1100
x14645
1820B
JoJo's Incredible Adventures
math
,
strings
,
two pointers
1100
x13209
1904B
Collecting Game
binary search
,
dp
,
greedy
,
sortings
,
two pointers
1100
x12579
1884B
Haunted House
binary search
,
greedy
,
math
,
two pointers
1100
x11542
489B
BerSU Ball
dfs and similar
,
dp
,
graph matchings
,
greedy
,
sortings
,
two pointers
1200
x46159
1343C
Alternating Subsequence
dp
,
greedy
,
two pointers
1200
x36185
1354B
Ternary String
binary search
,
dp
,
implementation
,
two pointers
1200
x29007
1399C
Boats Competition
brute force
,
greedy
,
two pointers
1200
x27627
1364A
XXXXX
brute force
,
data structures
,
number theory
,
two pointers
1200
x26679
1133C
Balanced Team
sortings
,
two pointers
1200
x21155
1006C
Three Parts of the Array
binary search
,
data structures
,
two pointers
1200
x20095
1598C
Delete Two Elements
data structures
,
dp
,
implementation
,
math
,
two pointers
1200
x19950
1692E
Binary Deque
binary search
,
implementation
,
two pointers
1200
x19716
961B
Lecture Sleep
data structures
,
dp
,
implementation
,
two pointers
1200
x19046
1729D
Friends and the Restaurant
greedy
,
sortings
,
two pointers
1200
x18650
1793C
Dora and Search
constructive algorithms
,
data structures
,
two pointers
1200
x17914
1257C
Dominated Subarray
greedy
,
implementation
,
sortings
,
strings
,
two pointers
1200
x15526
1928B
Equalize
binary search
,
greedy
,
sortings
,
two pointers
1200
x14931
1582C
Grandma Capa Knits a Scarf
brute force
,
data structures
,
greedy
,
strings
,
two pointers
1200
x14195
6C
Alice, Bob and Chocolate
greedy
,
two pointers
1200
x12861
387B
George and Round
brute force
,
greedy
,
two pointers
1200
x11894
1305B
Kuroni and Simple Strings
constructive algorithms
,
greedy
,
strings
,
two pointers
1200
x11238
264A
Escape from Stones
constructive algorithms
,
data structures
,
implementation
,
two pointers
1200
x10577
842A
Kirill And The Game
brute force
,
two pointers
1200
x9953
892B
Wrath
greedy
,
implementation
,
two pointers
1200
x8645
302B
Eugeny and Play List
binary search
,
implementation
,
two pointers
1200
x7764
769B
News About Credit
*special problem
,
greedy
,
two pointers
1200
x3230
600B
Queries about less or equal elements
binary search
,
data structures
,
sortings
,
two pointers
1300
x27192
1538C
Number of Pairs
binary search
,
data structures
,
math
,
two pointers
1300
x26796
1470A
Strange Birthday Party
binary search
,
dp
,
greedy
,
sortings
,
two pointers
1300
x21132
1366B
Shuffle
math
,
two pointers
1300
x19491
1364B
Most socially-distanced subsequence
greedy
,
two pointers
1300
x18334
1927D
Find the Different Ones!
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
two pointers
1300
x17892
251A
Points on Line
binary search
,
combinatorics
,
two pointers
1300
x16501
1676F
Longest Strike
data structures
,
greedy
,
implementation
,
sortings
,
two pointers
1300
x15693
1237B
Balanced Tunnel
data structures
,
sortings
,
two pointers
1300
x14578
1736C1
Good Subarrays (Easy Version)
binary search
,
data structures
,
schedules
,
two pointers
1300
x14421
1873F
Money Trees
binary search
,
greedy
,
math
,
two pointers
1300
x13612
1794C
Scoring Subsequences
binary search
,
greedy
,
math
,
two pointers
1300
x12319
1265B
Beautiful Numbers
data structures
,
implementation
,
math
,
two pointers
1300
x12281
1007A
Reorder the Array
combinatorics
,
data structures
,
math
,
sortings
,
two pointers
1300
x11966
716B
Complete the Word
greedy
,
two pointers
1300
x11772
1870C
Colorful Table
binary search
,
data structures
,
dp
,
implementation
,
math
,
two pointers
1300
x10651
1225B2
TV Subscriptions (Hard Version)
implementation
,
two pointers
1300
x10056
1107C
Brutality
greedy
,
sortings
,
two pointers
1300
x9633
318B
Strings of Power
implementation
,
strings
,
two pointers
1300
x7357
1776H
Beppa and SwerChat
two pointers
1300
x5971
161A
Dress'em in Vests!
binary search
,
brute force
,
greedy
,
two pointers
1300
x4671
60A
Where Are My Flakes?
implementation
,
two pointers
1300
x3514
279B
Books
binary search
,
brute force
,
implementation
,
two pointers
1400
x47315
1324D
Pair of Topics
binary search
,
data structures
,
sortings
,
two pointers
1400
x26560
1374D
Zero Remainder Array
math
,
sortings
,
two pointers
1400
x22085
1369C
RationalLee
greedy
,
math
,
sortings
,
two pointers
1400
x18988
1535C
Unstable String
binary search
,
dp
,
greedy
,
implementation
,
strings
,
two pointers
1400
x16027
1692G
2^Sort
data structures
,
dp
,
sortings
,
two pointers
1400
x15736
1701C
Schedule Management
binary search
,
greedy
,
implementation
,
two pointers
1400
x15611
1628A
Meximum Array
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
,
two pointers
1400
x15146
1697C
awoo's Favorite Problem
binary search
,
constructive algorithms
,
data structures
,
greedy
,
implementation
,
strings
,
two pointers
1400
x13898
1932C
LR-remainders
brute force
,
data structures
,
implementation
,
math
,
two pointers
1400
x13255
1721C
Min-Max Array Transformation
binary search
,
greedy
,
two pointers
1400
x12917
1719C
Fighting Tournament
binary search
,
data structures
,
implementation
,
two pointers
1400
x12816
1771B
Hossam and Friends
binary search
,
constructive algorithms
,
dp
,
two pointers
1400
x12695
1927E
Klever Permutation
constructive algorithms
,
math
,
two pointers
1400
x12134
1955D
Inaccurate Subsequence Search
data structures
,
two pointers
1400
x11009
602B
Approximating a Constant Range
dp
,
implementation
,
two pointers
1400
x10366
1904C
Array Game
binary search
,
brute force
,
data structures
,
sortings
,
two pointers
1400
x10342
253B
Physics Practical
binary search
,
dp
,
sortings
,
two pointers
1400
x10265
1609C
Complex Market Analysis
binary search
,
dp
,
implementation
,
number theory
,
schedules
,
two pointers
1400
x9445
1190A
Tokitsukaze and Discard Items
implementation
,
two pointers
1400
x9103
920C
Swap Adjacent Elements
dfs and similar
,
greedy
,
math
,
sortings
,
two pointers
1400
x8973
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