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Codeforces Round 968 (Div. 2)
2 days
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Difficulty:
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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
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Custom test
Problems
#
Name
1697A
Parkway Walk
greedy
,
implementation
800
x25649
1696A
NIT orz!
bitmasks
,
greedy
800
x18654
1695A
Subrectangle Guess
games
800
x16279
1694A
Creep
greedy
,
implementation
800
x22385
1692C
Where's the Bishop?
implementation
800
x33547
1692B
All Distinct
greedy
,
sortings
800
x33771
1692A
Marathon
implementation
800
x63472
1691A
Beat The Odds
brute force
,
greedy
,
math
800
x30335
1690C
Restoring the Duration of Tasks
data structures
,
greedy
,
implementation
800
x25891
1690B
Array Decrements
greedy
,
implementation
800
x25127
1690A
Print a Pedestal (Codeforces logo?)
constructive algorithms
,
greedy
800
x33163
1689A
Lex String
brute force
,
greedy
,
implementation
,
sortings
,
two pointers
800
x16666
1688B
Patchouli's Magical Talisman
bitmasks
,
constructive algorithms
,
greedy
,
sortings
800
x18134
1688A
Cirno's Perfect Bitmasks Classroom
bitmasks
,
brute force
800
x21380
1686B
Odd Subarrays
dp
,
greedy
800
x18159
1686A
Everything Everywhere All But One
greedy
800
x20363
1684B
Z mod X = C
constructive algorithms
,
math
800
x20887
1684A
Digit Minimization
constructive algorithms
,
games
,
math
,
strings
800
x23745
1682A
Palindromic Indices
greedy
,
strings
800
x19211
1681B
Card Trick
implementation
,
math
800
x20028
1681A
Game with Cards
games
,
greedy
800
x20910
1680B
Robots
implementation
800
x18252
1680A
Minimums and Maximums
brute force
,
math
800
x21484
1678B1
Tokitsukaze and Good 01-String (easy version)
implementation
800
x15870
1678A
Tokitsukaze and All Zero Sequence
implementation
800
x18100
1676C
Most Similar Words
brute force
,
greedy
,
implementation
,
implementation
,
math
,
strings
800
x29757
1676B
Equal Candies
greedy
,
math
,
sortings
800
x47356
1676A
Lucky?
implementation
800
x61980
1675A
Food for Animals
greedy
,
math
800
x32668
1674B
Dictionary
combinatorics
,
math
800
x26121
1674A
Number Transformation
constructive algorithms
,
math
800
x26123
1673A
Subtle Substring Subtraction
games
,
greedy
,
strings
800
x18383
1672B
I love AAAB
constructive algorithms
,
implementation
800
x15753
1672A
Log Chopping
games
,
implementation
,
math
800
x16022
1671A
String Building
implementation
800
x20388
1670A
Prof. Slim
greedy
,
implementation
,
sortings
800
x15372
1669C
Odd/Even Increments
greedy
,
greedy
,
implementation
,
math
800
x34157
1669B
Triple
implementation
,
sortings
800
x42222
1669A
Division?
implementation
800
x61097
1668A
Direction Change
implementation
,
math
800
x16260
1665A
GCD vs LCM
constructive algorithms
,
math
800
x23416
1661A
Array Balancing
greedy
,
math
800
x18314
1660B
Vlad and Candies
math
800
x27952
1660A
Vasya and Coins
greedy
,
math
800
x35714
1658B
Marin and Anti-coprime Permutation
combinatorics
,
math
,
number theory
800
x18525
1658A
Marin and Photoshoot
constructive algorithms
,
implementation
,
math
800
x20264
1657B
XY Sequence
greedy
800
x22750
1657A
Integer Moves
brute force
,
math
800
x23910
1656A
Good Pairs
math
,
sortings
800
x19540
1654B
Prefix Removals
strings
800
x15573
1654A
Maximum Cake Tastiness
brute force
,
greedy
,
implementation
,
sortings
800
x18599
1651B
Prove Him Wrong
constructive algorithms
,
greedy
800
x19489
1651A
Playoff
implementation
800
x25590
1650A
Deletions of Two Adjacent Letters
implementation
,
strings
800
x34483
1649A
Game
implementation
800
x15488
1647A
Madoka and Math Dad
implementation
,
math
800
x22689
1646B
Quality vs Quantity
brute force
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
800
x21075
1646A
Square Counting
math
800
x24185
1644B
Anti-Fibonacci Permutation
brute force
,
constructive algorithms
,
implementation
800
x20615
1644A
Doors and Keys
implementation
800
x27236
1642A
Hard Way
geometry
800
x16131
1638A
Reverse
constructive algorithms
,
greedy
,
math
800
x21391
1637A
Sorting Parts
brute force
,
sortings
800
x22224
1635B
Avoid Local Maximums
greedy
800
x17902
1635A
Min Or Sum
bitmasks
,
greedy
800
x22744
1634A
Reverse and Concatenate
greedy
,
strings
800
x23811
1633B
Minority
greedy
800
x27648
1633A
Div. 7
brute force
800
x32737
1632A
ABC
implementation
800
x29309
1631A
Min Max Swap
greedy
800
x28969
1629B
GCD Arrays
greedy
,
math
,
number theory
800
x23283
1629A
Download More RAM
brute force
,
greedy
,
sortings
800
x28891
1627A
Not Shading
constructive algorithms
,
implementation
800
x23947
1626A
Equidistant Letters
constructive algorithms
,
sortings
800
x28658
1625A
Ancient Civilization
bitmasks
,
greedy
,
math
800
x17147
1624A
Plus One on the Subset
math
800
x51263
1623A
Robot Cleaner
brute force
,
implementation
,
math
800
x20002
1622A
Construct a Rectangle
geometry
,
math
800
x29881
1621A
Stable Arrangement of Rooks
constructive algorithms
800
x23708
1620A
Equal or Not Equal
constructive algorithms
,
dsu
,
implementation
800
x21488
1619B
Squares and Cubes
implementation
,
math
800
x30602
1619A
Square String?
implementation
,
strings
800
x50485
1618B
Missing Bigram
implementation
800
x22547
1618A
Polycarp and Sums of Subsequences
math
,
sortings
800
x32131
1617A
Forbidden Subsequence
constructive algorithms
,
greedy
,
sortings
,
strings
800
x16231
1616A
Integer Diversity
implementation
800
x22625
1615A
Closing The Gap
greedy
,
math
800
x20687
1614A
Divan and a Store
brute force
,
constructive algorithms
,
greedy
800
x23205
1612A
Distance
brute force
,
constructive algorithms
800
x17613
1611B
Team Composition: Programmers and Mathematicians
binary search
,
constructive algorithms
,
math
800
x29264
1611A
Make Even
constructive algorithms
,
math
800
x31236
1608A
Find Array
constructive algorithms
,
math
800
x18988
1607A
Linear Keyboard
implementation
,
strings
800
x37097
1605A
A.M. Deviation
math
,
number theory
800
x20541
1604A
Era
greedy
800
x21367
1602A
Two Subsequences
implementation
800
x18919
1598A
Computer Game
brute force
,
dfs and similar
,
dp
,
implementation
800
x23143
1594A
Consecutive Sum Riddle
math
800
x24283
1593A
Elections
math
800
x36393
1592A
Gamer Hemose
binary search
,
greedy
,
math
,
sortings
800
x21986
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