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Codeforces Round 950 (Div. 3)
35:33:50
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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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Problems
#
Name
1746B
Rebellion
constructive algorithms
,
greedy
,
two pointers
800
x16813
1744F
MEX vs MED
math
,
two pointers
2000
x2929
1744C
Traffic Light
binary search
,
implementation
,
two pointers
1000
x24701
1741C
Minimize the Thickness
brute force
,
greedy
,
math
,
two pointers
1100
x17313
1738E
Balance Addicts
combinatorics
,
dp
,
math
,
two pointers
2300
x1471
1736C2
Good Subarrays (Hard Version)
binary search
,
data structures
,
dp
,
two pointers
2400
x1246
1736C1
Good Subarrays (Easy Version)
binary search
,
data structures
,
schedules
,
two pointers
1300
x14599
1734D
Slime Escape
data structures
,
dp
,
greedy
,
two pointers
1800
x6066
1732C2
Sheikh (Hard Version)
binary search
,
bitmasks
,
brute force
,
greedy
,
implementation
,
two pointers
2100
x2474
1732C1
Sheikh (Easy version)
binary search
,
bitmasks
,
greedy
,
two pointers
1800
x5616
1731D
Valiant's New Map
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x6802
1730D
Prefixes and Suffixes
constructive algorithms
,
strings
,
two pointers
2200
x2605
1729G
Cut Substrings
combinatorics
,
dp
,
hashing
,
strings
,
two pointers
2100
x2073
1729D
Friends and the Restaurant
greedy
,
sortings
,
two pointers
1200
x19115
1728G
Illumination
binary search
,
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
,
two pointers
2700
x429
1728D
Letter Picking
constructive algorithms
,
dp
,
games
,
two pointers
1800
x6923
1725C
Circular Mirror
binary search
,
combinatorics
,
geometry
,
math
,
two pointers
2000
x1551
1721C
Min-Max Array Transformation
binary search
,
greedy
,
two pointers
1400
x13027
1720D1
Xor-Subsequence (easy version)
bitmasks
,
brute force
,
dp
,
strings
,
trees
,
two pointers
1800
x5763
1719C
Fighting Tournament
binary search
,
data structures
,
implementation
,
two pointers
1400
x12921
1712E2
LCM Sum (hard version)
brute force
,
data structures
,
math
,
number theory
,
two pointers
2500
x1185
1712E1
LCM Sum (easy version)
binary search
,
brute force
,
combinatorics
,
math
,
number theory
,
two pointers
2300
x2052
1706D2
Chopping Carrots (Hard Version)
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
2400
x1660
1701D
Permutation Restoration
binary search
,
data structures
,
greedy
,
math
,
sortings
,
two pointers
1900
x5519
1701C
Schedule Management
binary search
,
greedy
,
implementation
,
two pointers
1400
x15931
1699E
Three Days Grace
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
2600
x1097
1698E
PermutationForces II
brute force
,
combinatorics
,
greedy
,
sortings
,
trees
,
two pointers
2300
x1584
1697C
awoo's Favorite Problem
binary search
,
constructive algorithms
,
data structures
,
greedy
,
implementation
,
strings
,
two pointers
1400
x14012
1696H
Maximum Product?
brute force
,
combinatorics
,
dp
,
greedy
,
implementation
,
math
,
two pointers
3500
x155
1693F
I Might Be Wrong
binary search
,
greedy
,
two pointers
3400
x276
1692G
2^Sort
data structures
,
dp
,
sortings
,
two pointers
1400
x16210
1692E
Binary Deque
binary search
,
implementation
,
two pointers
1200
x20247
1691D
Max GEQ Sum
binary search
,
constructive algorithms
,
data structures
,
divide and conquer
,
implementation
,
two pointers
1800
x5533
1691B
Shoe Shuffling
constructive algorithms
,
greedy
,
implementation
,
two pointers
1000
x21530
1690E
Price Maximization
binary search
,
greedy
,
math
,
two pointers
1500
x14627
1690D
Black and White Stripe
implementation
,
two pointers
1000
x27196
1689A
Lex String
brute force
,
greedy
,
implementation
,
sortings
,
two pointers
800
x16409
1684F
Diverse Segments
data structures
,
two pointers
2600
x845
1684E
MEX vs DIFF
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
2100
x3062
1682F
MCMF?
data structures
,
flows
,
graphs
,
greedy
,
sortings
,
two pointers
2700
x289
1680C
Binary String
binary search
,
greedy
,
strings
,
two pointers
1600
x9560
1676F
Longest Strike
data structures
,
greedy
,
implementation
,
sortings
,
two pointers
1300
x15957
1672D
Cyclic Rotation
constructive algorithms
,
greedy
,
implementation
,
two pointers
1700
x6019
1669F
Eating Candies
binary search
,
data structures
,
greedy
,
two pointers
1100
x23506
1665E
MinimizOR
bitmasks
,
brute force
,
data structures
,
divide and conquer
,
greedy
,
implementation
,
two pointers
2500
x1431
1660D
Maximum Product Strikes Back
brute force
,
implementation
,
math
,
two pointers
1600
x8234
1659D
Reverse Sort Sum
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
,
two pointers
1900
x3898
1656B
Subtract Operation
data structures
,
greedy
,
math
,
two pointers
1100
x17834
1646B
Quality vs Quantity
brute force
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
800
x20912
1641D
Two Arrays
bitmasks
,
brute force
,
combinatorics
,
greedy
,
hashing
,
math
,
two pointers
2700
x1053
1638F
Two Posters
brute force
,
data structures
,
greedy
,
two pointers
3200
x196
1632D
New Year Concert
binary search
,
data structures
,
greedy
,
math
,
number theory
,
two pointers
2000
x4497
1630C
Paint the Middle
dp
,
greedy
,
sortings
,
two pointers
2200
x2856
1630B
Range and Partition
binary search
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
1800
x5536
1628A
Meximum Array
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
,
two pointers
1400
x15269
1627E
Not Escaping
data structures
,
dp
,
implementation
,
shortest paths
,
two pointers
2200
x2255
1626C
Monsters And Spells
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
math
,
two pointers
1700
x10673
1622D
Shuffle
combinatorics
,
math
,
two pointers
2000
x3894
1619H
Permutation and Queries
brute force
,
data structures
,
divide and conquer
,
two pointers
2400
x1079
1611F
ATM and Students
binary search
,
data structures
,
two pointers
1800
x6237
1611E1
Escape The Maze (easy version)
dfs and similar
,
greedy
,
shortest paths
,
trees
,
two pointers
1700
x6992
1610B
Kalindrome Array
greedy
,
two pointers
1100
x14952
1609F
Interesting Sections
data structures
,
divide and conquer
,
meet-in-the-middle
,
two pointers
2800
x734
1609C
Complex Market Analysis
binary search
,
dp
,
implementation
,
number theory
,
schedules
,
two pointers
1400
x9532
1608C
Game Master
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
two pointers
1700
x6448
1607H
Banquet Preparations 2
greedy
,
sortings
,
two pointers
2200
x1201
1605E
Array Equalizer
binary search
,
greedy
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2400
x1001
1601B
Frog Traveler
data structures
,
dfs and similar
,
dp
,
graphs
,
shortest paths
,
two pointers
1900
x4798
1600E
Array Game
games
,
greedy
,
two pointers
1900
x1943
1599A
Weights
constructive algorithms
,
greedy
,
two pointers
2600
x635
1598C
Delete Two Elements
data structures
,
dp
,
implementation
,
math
,
two pointers
1200
x20162
1592E
Bored Bakry
bitmasks
,
greedy
,
math
,
two pointers
2400
x1550
1588F
Jumping Through the Array
binary search
,
data structures
,
graphs
,
two pointers
3500
x272
1582F2
Korney Korneevich and XOR (hard version)
binary search
,
brute force
,
dp
,
greedy
,
two pointers
2400
x1719
1582C
Grandma Capa Knits a Scarf
brute force
,
data structures
,
greedy
,
strings
,
two pointers
1200
x14615
1572B
Xor of 3
brute force
,
constructive algorithms
,
greedy
,
two pointers
2500
x1752
1569D
Inconvenient Pairs
binary search
,
data structures
,
implementation
,
sortings
,
two pointers
1900
x4308
1566D2
Seating Arrangements (hard version)
data structures
,
greedy
,
implementation
,
sortings
,
two pointers
1600
x7711
1559D2
Mocha and Diana (Hard Version)
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
trees
,
two pointers
2500
x2542
1558B
Up the Strip
brute force
,
dp
,
math
,
number theory
,
two pointers
1900
x4629
1556G
Gates to Another World
bitmasks
,
data structures
,
dsu
,
two pointers
3300
x310
1555E
Boring Segments
data structures
,
sortings
,
trees
,
two pointers
2100
x3878
1553D
Backspace
dp
,
greedy
,
strings
,
two pointers
1500
x13385
1550E
Stringforces
binary search
,
bitmasks
,
brute force
,
dp
,
strings
,
two pointers
2500
x1451
1550D
Excellent Arrays
binary search
,
combinatorics
,
constructive algorithms
,
implementation
,
math
,
sortings
,
two pointers
2300
x1791
1548B
Integers Have Friends
binary search
,
data structures
,
divide and conquer
,
math
,
number theory
,
two pointers
1800
x9379
1547F
Array Stabilization (GCD version)
binary search
,
brute force
,
data structures
,
divide and conquer
,
number theory
,
two pointers
1900
x5569
1547E
Air Conditioners
data structures
,
dp
,
implementation
,
shortest paths
,
sortings
,
two pointers
1500
x13937
1547C
Pair Programming
greedy
,
two pointers
1100
x22091
1539D
PriceFixed
binary search
,
greedy
,
implementation
,
sortings
,
two pointers
1600
x11326
1538C
Number of Pairs
binary search
,
data structures
,
math
,
two pointers
1300
x27258
1537E2
Erase and Extend (Hard Version)
binary search
,
data structures
,
greedy
,
hashing
,
string suffix structures
,
strings
,
two pointers
2200
x5016
1537E1
Erase and Extend (Easy Version)
binary search
,
brute force
,
dp
,
greedy
,
hashing
,
implementation
,
string suffix structures
,
strings
,
two pointers
1600
x12358
1535C
Unstable String
binary search
,
dp
,
greedy
,
implementation
,
strings
,
two pointers
1400
x16157
1525E
Assimilation IV
combinatorics
,
dp
,
math
,
probabilities
,
two pointers
2100
x1974
1519D
Maximum Sum of Products
brute force
,
dp
,
implementation
,
math
,
two pointers
1600
x14656
1517E
Group Photo
binary search
,
data structures
,
implementation
,
two pointers
2500
x955
1516D
Cut
binary search
,
data structures
,
dp
,
graphs
,
number theory
,
two pointers
2100
x4118
1515D
Phoenix and Socks
greedy
,
sortings
,
two pointers
1500
x11181
1514E
Baby Ehab's Hyper Apartment
binary search
,
graphs
,
interactive
,
sortings
,
two pointers
2700
x591
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