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Rayan
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Before contest
Codeforces Round 994 (Div. 2)
19:13:09
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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
2052A
Adrenaline Rush
constructive algorithms
1600
x960
2046B
Move Back at a Cost
binary search
,
data structures
,
greedy
,
sortings
1600
x6267
2040C
Ordered Permutations
bitmasks
,
combinatorics
,
constructive algorithms
,
greedy
,
math
,
two pointers
1600
x6814
2037E
Kachina's Favorite Binary String
dp
,
greedy
,
interactive
,
two pointers
1600
x5178
2036E
Reverse the Rivers
binary search
,
constructive algorithms
,
data structures
,
greedy
1600
x7070
2034D
Darius' Wisdom
constructive algorithms
,
greedy
,
implementation
,
sortings
1600
x4416
2028C
Alice's Adventures in Cutting Cake
binary search
,
dp
,
greedy
,
two pointers
1600
x6832
2018A
Cards Partition
2-sat
,
brute force
,
greedy
,
implementation
,
math
1600
x10383
2004D
Colored Portals
binary search
,
brute force
,
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
1600
x10943
1996E
Decode
combinatorics
,
data structures
,
implementation
,
math
1600
x10050
1994C
Hungry Games
binary search
,
dp
,
two pointers
1600
x11011
1985G
D-Function
combinatorics
,
math
,
number theory
1600
x9660
1980E
Permutation of Rows and Columns
constructive algorithms
,
data structures
,
greedy
,
hashing
,
implementation
,
math
,
matrices
,
sortings
1600
x10759
1978D
Elections
data structures
,
greedy
,
implementation
,
math
1600
x11509
1976C
Job Interview
binary search
,
dp
,
greedy
,
implementation
,
two pointers
1600
x10551
1971F
Circle Perimeter
binary search
,
brute force
,
dfs and similar
,
geometry
,
implementation
,
math
1600
x10284
1968E
Cells Arrangement
constructive algorithms
1600
x10617
1958D
Staircase
*special problem
1600
x543
1957C
How Does the Rook Move?
combinatorics
,
dp
,
math
1600
x9873
1956C
Nene's Magical Matrix
constructive algorithms
,
greedy
,
math
1600
x13130
1946C
Tree Cutting
binary search
,
dp
,
greedy
,
implementation
,
trees
1600
x11190
1941E
Rudolf and k Bridges
binary search
,
data structures
,
dp
,
two pointers
1600
x9955
1938H
Pho Restaurant
1600
x2212
1932E
Final Countdown
implementation
,
math
,
number theory
1600
x8447
1928C
Physical Education Lesson
brute force
,
math
,
number theory
1600
x8768
1921E
Eat the Chip
brute force
,
games
,
greedy
,
math
1600
x9995
1920C
Partitioning the Array
brute force
,
math
,
number theory
1600
x14151
1917C
Watering an Array
brute force
,
greedy
,
implementation
,
math
1600
x10709
1910C
Poisonous Swamp
*special problem
,
*special problem
,
implementation
,
implementation
1600
x651
1910B
Security Guard
*special problem
,
greedy
1600
x687
1907E
Good Triples
brute force
,
combinatorics
,
number theory
1600
x10715
1904D1
Set To Max (Easy Version)
brute force
,
constructive algorithms
,
greedy
1600
x6988
1899F
Alex's whims
constructive algorithms
,
graphs
,
greedy
,
shortest paths
,
trees
1600
x7914
1886C
Decreasing String
implementation
,
strings
1600
x11911
1878D
Reverse Madness
data structures
,
greedy
1600
x8598
1875D
Jellyfish and Mex
dp
1600
x9025
1862E
Kolya and Movie Theatre
constructive algorithms
,
data structures
,
greedy
1600
x10993
1861C
Queries for the Array
data structures
,
dfs and similar
,
implementation
,
strings
,
trees
1600
x10362
1857F
Sum and Product
binary search
,
data structures
,
math
1600
x11940
1856C
To Become Max
binary search
,
brute force
,
data structures
,
dp
1600
x12814
1849C
Binary String Copying
binary search
,
brute force
,
data structures
,
hashing
,
strings
1600
x10811
1843E
Tracking Segments
binary search
,
brute force
,
data structures
,
two pointers
1600
x12856
1840E
Character Blocking
data structures
,
hashing
,
implementation
1600
x8210
1833E
Round Dance
dfs and similar
,
dsu
,
graphs
,
shortest paths
1600
x12295
1829G
Hits Different
data structures
,
dp
,
implementation
,
math
1600
x10843
1822E
Making Anti-Palindromes
greedy
,
math
,
strings
1600
x10725
1811D
Umka and a Long Flight
constructive algorithms
,
implementation
,
math
1600
x7675
1806C
Sequence Master
brute force
,
constructive algorithms
,
math
1600
x7759
1801A
The Very Beautiful Blanket
bitmasks
,
constructive algorithms
1600
x8730
1798D
Shocking Arrangement
constructive algorithms
,
greedy
,
math
1600
x10330
1797C
Li Hua and Chess
constructive algorithms
,
greedy
,
interactive
1600
x7848
1796C
Maximum Set
binary search
,
math
1600
x10657
1795D
Triangle Coloring
combinatorics
,
math
1600
x9474
1787C
Remove the Bracket
dp
,
greedy
,
math
1600
x7209
1781C
Equal Frequencies
brute force
,
constructive algorithms
,
greedy
,
implementation
,
sortings
,
strings
1600
x7838
1779C
Least Prefix Sum
data structures
,
greedy
1600
x12621
1778C
Flexible String
bitmasks
,
brute force
,
strings
1600
x8456
1775C
Interesting Sequence
bitmasks
,
math
1600
x10768
1774D
Same Count One
brute force
,
constructive algorithms
,
greedy
,
implementation
,
two pointers
1600
x8058
1771C
Hossam and Trainees
greedy
,
math
,
number theory
1600
x9905
1766D
Lucky Chains
math
,
number theory
1600
x9095
1753B
Factorial Divisibility
math
,
number theory
1600
x13052
1748C
Zero-Sum Prefixes
brute force
,
data structures
,
dp
,
greedy
,
implementation
1600
x11358
1741E
Sending a Sequence Over the Network
dp
1600
x12775
1730B
Meeting on the Line
binary search
,
geometry
,
greedy
,
implementation
,
math
,
ternary search
1600
x13096
1722E
Counting Rectangles
brute force
,
data structures
,
dp
,
implementation
1600
x11180
1714D
Color with Occurrences
brute force
,
data structures
,
dp
,
greedy
,
strings
1600
x9242
1707A
Doremy's IQ
binary search
,
constructive algorithms
,
greedy
,
implementation
1600
x13812
1703G
Good Key, Bad Key
bitmasks
,
brute force
,
dp
,
greedy
,
math
1600
x10956
1702E
Split Into Two Sets
dfs and similar
,
dsu
,
graphs
1600
x13692
1698D
Fixed Point Guessing
binary search
,
constructive algorithms
,
interactive
1600
x9574
1689C
Infected Tree
dfs and similar
,
dp
,
trees
1600
x11457
1687A
The Enchanted Forest
brute force
,
greedy
1600
x10500
1680C
Binary String
binary search
,
greedy
,
strings
,
two pointers
1600
x10097
1677A
Tokitsukaze and Strange Inequality
brute force
,
data structures
,
dp
1600
x8551
1671D
Insert a Progression
brute force
,
constructive algorithms
,
greedy
1600
x7774
1665C
Tree Infection
binary search
,
greedy
,
sortings
,
trees
1600
x8478
1660E
Matrix and Shifts
brute force
,
constructive algorithms
,
greedy
,
implementation
1600
x7419
1660D
Maximum Product Strikes Back
brute force
,
implementation
,
math
,
two pointers
1600
x8841
1658D1
388535 (Easy Version)
bitmasks
,
math
1600
x9204
1633D
Make Them Equal
dp
,
greedy
1600
x14461
1632C
Strange Test
binary search
,
bitmasks
,
brute force
,
dp
,
math
1600
x12887
1623C
Balanced Stone Heaps
binary search
,
greedy
1600
x12363
1622C
Set or Decrease
binary search
,
brute force
,
greedy
,
sortings
1600
x13279
1615C
Menorah
brute force
,
graphs
,
greedy
,
math
1600
x8498
1612D
X-Magic Pair
math
,
number theory
1600
x9347
1610C
Keshi Is Throwing a Party
binary search
,
greedy
1600
x11884
1609D
Social Network
dsu
,
graphs
,
greedy
,
implementation
,
trees
1600
x7392
1607E
Robot on the Board 1
implementation
1600
x9435
1603B
Moderate Modular Mode
constructive algorithms
,
math
,
number theory
1600
x13765
1593E
Gardener and Tree
brute force
,
data structures
,
dfs and similar
,
greedy
,
implementation
,
trees
1600
x12658
1582D
Vupsen, Pupsen and 0
constructive algorithms
,
math
1600
x10675
1567C
Carrying Conundrum
bitmasks
,
combinatorics
,
dp
,
math
1600
x12276
1566D2
Seating Arrangements (hard version)
data structures
,
greedy
,
implementation
,
sortings
,
two pointers
1600
x7927
1555D
Say No to Palindromes
brute force
,
constructive algorithms
,
dp
,
strings
1600
x12628
1542C
Strange Function
math
,
number theory
1600
x14459
1539D
PriceFixed
binary search
,
greedy
,
implementation
,
sortings
,
two pointers
1600
x11788
1537E1
Erase and Extend (Easy Version)
binary search
,
brute force
,
dp
,
greedy
,
hashing
,
implementation
,
string suffix structures
,
strings
,
two pointers
1600
x13274
1530D
Secret Santa
constructive algorithms
,
flows
,
graphs
,
greedy
,
math
1600
x9327
1528A
Parsa's Humongous Tree
dfs and similar
,
divide and conquer
,
dp
,
greedy
,
trees
1600
x15144
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