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Rayan
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Before contest
Codeforces Round 1003 (Div. 4)
45:16:55
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Difficulty:
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dp
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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Name
2063C
Remove Exactly Two
brute force
,
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
sortings
,
trees
1600
x9625
2061C
Kevin and Puzzle
2-sat
,
combinatorics
,
dp
1600
x6668
2053C
Bewitching Stargazer
bitmasks
,
divide and conquer
,
dp
,
math
1500
x9799
2050E
Three Strings
dp
,
implementation
,
strings
1500
x10458
2043C
Sums on Segments
binary search
,
brute force
,
data structures
,
dp
,
greedy
,
math
1600
x8325
2038L
Bridge Renovation
brute force
,
dp
,
greedy
,
math
,
two pointers
1400
x5516
2037E
Kachina's Favorite Binary String
dp
,
greedy
,
interactive
,
two pointers
1600
x5728
2033D
Kousuke's Assignment
data structures
,
dp
,
dsu
,
greedy
,
math
1300
x14636
2033C
Sakurako's Field Trip
dp
,
greedy
,
two pointers
1400
x14259
2028C
Alice's Adventures in Cutting Cake
binary search
,
dp
,
greedy
,
two pointers
1600
x7650
2027C
Add Zeros
brute force
,
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
1500
x10562
2008E
Alternating String
brute force
,
data structures
,
dp
,
greedy
,
implementation
,
strings
1500
x10820
1999E
Triple Operations
dp
,
implementation
,
math
1300
x20071
1997D
Maximize the Root
binary search
,
dfs and similar
,
dp
,
greedy
,
trees
1500
x13335
1994C
Hungry Games
binary search
,
dp
,
two pointers
1600
x11441
1986D
Mathematical Problem
brute force
,
dp
,
greedy
,
implementation
,
math
,
two pointers
1400
x15852
1984C1
Magnitude (Easy Version)
dp
,
greedy
,
math
1300
x17482
1976C
Job Interview
binary search
,
dp
,
greedy
,
implementation
,
two pointers
1600
x10837
1957C
How Does the Rook Move?
combinatorics
,
dp
,
math
1600
x10197
1948C
Arrow Path
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
shortest paths
1300
x17715
1946C
Tree Cutting
binary search
,
dp
,
greedy
,
implementation
,
trees
1600
x11619
1945D
Seraphim the Owl
dp
,
greedy
1300
x15202
1941E
Rudolf and k Bridges
binary search
,
data structures
,
dp
,
two pointers
1600
x10227
1937B
Binary Path
dp
,
greedy
,
implementation
1300
x15645
1927D
Find the Different Ones!
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
two pointers
1300
x23274
1926E
Vlad and an Odd Ordering
binary search
,
bitmasks
,
data structures
,
dp
,
implementation
,
math
,
number theory
1500
x12780
1924A
Did We Get Everything Covered?
constructive algorithms
,
dp
,
greedy
,
shortest paths
,
strings
1500
x14624
1919C
Grouping Increases
data structures
,
dp
,
greedy
1400
x20636
1900C
Anji's Binary Tree
dfs and similar
,
dp
,
trees
1300
x12127
1895C
Torn Lucky Ticket
brute force
,
dp
,
hashing
,
implementation
,
math
1400
x11718
1881E
Block Sequence
dp
1500
x15921
1879C
Make it Alternating
combinatorics
,
dp
,
greedy
1300
x18417
1875D
Jellyfish and Mex
dp
1600
x9380
1872E
Data Structures Fan
binary search
,
bitmasks
,
data structures
,
dp
1500
x14825
1870C
Colorful Table
binary search
,
data structures
,
dp
,
implementation
,
math
,
two pointers
1300
x11939
1860C
Game on Permutation
data structures
,
dp
,
games
,
greedy
1400
x13931
1858B
The Walkway
brute force
,
dp
,
greedy
,
math
,
number theory
1500
x11728
1856C
To Become Max
binary search
,
brute force
,
data structures
,
dp
1600
x13331
1851E
Nastya and Potions
dfs and similar
,
dp
,
graphs
,
sortings
1500
x10918
1847C
Vampiric Powers, anyone?
bitmasks
,
brute force
,
dp
,
greedy
1400
x13363
1845C
Strong Password
binary search
,
dp
,
greedy
,
strings
1400
x14870
1844C
Particles
dp
,
greedy
,
implementation
,
math
1300
x16320
1842C
Tenzing and Balls
dp
1500
x13788
1830A
Copil Copac Draws Trees
dfs and similar
,
dp
,
graphs
,
trees
1400
x14534
1829G
Hits Different
data structures
,
dp
,
implementation
,
math
1600
x11268
1811E
Living Sequence
binary search
,
dp
,
math
,
number theory
1500
x12892
1789C
Serval and Toxel's Arrays
combinatorics
,
dp
,
implementation
,
math
1500
x8939
1787C
Remove the Bracket
dp
,
greedy
,
math
1600
x7373
1774C
Ice and Fire
constructive algorithms
,
dp
,
greedy
1300
x12336
1771B
Hossam and Friends
binary search
,
constructive algorithms
,
dp
,
two pointers
1400
x15553
1769C2
Подкрутка II
*special problem
,
dp
1300
x994
1767D
Playoff
combinatorics
,
constructive algorithms
,
dp
,
greedy
,
math
1500
x10272
1766C
Hamiltonian Wall
dp
,
implementation
1300
x14009
1759E
The Humanoid
brute force
,
dp
,
sortings
1500
x11290
1753A2
Make Nonzero Sum (hard version)
constructive algorithms
,
dp
,
greedy
1500
x10722
1753A1
Make Nonzero Sum (easy version)
constructive algorithms
,
dp
,
greedy
1300
x15405
1748C
Zero-Sum Prefixes
brute force
,
data structures
,
dp
,
greedy
,
implementation
1600
x11610
1741E
Sending a Sequence Over the Network
dp
1600
x13317
1739C
Card Game
combinatorics
,
constructive algorithms
,
dp
,
games
1500
x9338
1738C
Even Number Addicts
dp
,
games
,
greedy
,
math
1500
x11611
1722E
Counting Rectangles
brute force
,
data structures
,
dp
,
implementation
1600
x11462
1714D
Color with Occurrences
brute force
,
data structures
,
dp
,
greedy
,
strings
1600
x9377
1706C
Qpwoeirut And The City
dp
,
flows
,
greedy
,
implementation
1400
x15255
1703G
Good Key, Bad Key
bitmasks
,
brute force
,
dp
,
greedy
,
math
1600
x11218
1703F
Yet Another Problem About Pairs Satisfying an Inequality
binary search
,
data structures
,
dp
,
greedy
,
sortings
1300
x21569
1692G
2^Sort
data structures
,
dp
,
sortings
,
two pointers
1400
x19218
1689C
Infected Tree
dfs and similar
,
dp
,
trees
1600
x11693
1677A
Tokitsukaze and Strange Inequality
brute force
,
data structures
,
dp
1600
x8658
1676G
White-Black Balanced Subtrees
dfs and similar
,
dp
,
graphs
,
trees
1300
x16901
1673C
Palindrome Basis
brute force
,
dp
,
math
,
number theory
1500
x13554
1661B
Getting Zero
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
1300
x18397
1660C
Get an Even String
dp
,
greedy
,
strings
1300
x20071
1659C
Line Empire
binary search
,
brute force
,
dp
,
greedy
,
implementation
,
math
1500
x11200
1646C
Factorials and Powers of Two
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
math
1500
x14924
1644C
Increase Subarray Sums
brute force
,
dp
,
greedy
,
implementation
1400
x14020
1633D
Make Them Equal
dp
,
greedy
1600
x14956
1632C
Strange Test
binary search
,
bitmasks
,
brute force
,
dp
,
math
1600
x13011
1618D
Array and Operations
dp
,
greedy
,
math
1300
x19412
1614C
Divan and bitwise operations
bitmasks
,
combinatorics
,
constructive algorithms
,
dp
,
math
1500
x10460
1609C
Complex Market Analysis
binary search
,
dp
,
implementation
,
number theory
,
schedules
,
two pointers
1400
x9902
1567C
Carrying Conundrum
bitmasks
,
combinatorics
,
dp
,
math
1600
x12381
1555D
Say No to Palindromes
brute force
,
constructive algorithms
,
dp
,
strings
1600
x12905
1555C
Coin Rows
brute force
,
constructive algorithms
,
dp
,
implementation
1300
x22317
1553D
Backspace
dp
,
greedy
,
strings
,
two pointers
1500
x14036
1553B
Reverse String
brute force
,
dp
,
hashing
,
implementation
,
strings
1300
x14337
1547E
Air Conditioners
data structures
,
dp
,
implementation
,
shortest paths
,
sortings
,
two pointers
1500
x14818
1538F
Interesting Function
binary search
,
dp
,
math
,
number theory
1500
x19891
1537E1
Erase and Extend (Easy Version)
binary search
,
brute force
,
dp
,
greedy
,
hashing
,
implementation
,
string suffix structures
,
strings
,
two pointers
1600
x13525
1536C
Diluc and Kaeya
data structures
,
dp
,
hashing
,
number theory
1500
x14607
1535C
Unstable String
binary search
,
dp
,
greedy
,
implementation
,
strings
,
two pointers
1400
x16855
1534C
Little Alawn's Puzzle
combinatorics
,
dp
,
dsu
,
graphs
,
math
1300
x13012
1528A
Parsa's Humongous Tree
dfs and similar
,
divide and conquer
,
dp
,
greedy
,
trees
1600
x15431
1526C1
Potions (Easy Version)
brute force
,
data structures
,
dp
,
greedy
1500
x23580
1526B
I Hate 1111
dp
,
math
,
number theory
1400
x31863
1519D
Maximum Sum of Products
brute force
,
dp
,
implementation
,
math
,
two pointers
1600
x15699
1516B
AGAGA XOOORRR
bitmasks
,
brute force
,
dp
,
greedy
1500
x20401
1513C
Add One
dp
,
matrices
1600
x14641
1498C
Planar Reflections
brute force
,
data structures
,
dp
1600
x10046
1492C
Maximum width
binary search
,
data structures
,
dp
,
greedy
,
two pointers
1500
x16485
1476C
Longest Simple Cycle
dp
,
graphs
,
greedy
1600
x11558
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