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Consider the following two sequences :
X = < B, C, D, C, A, B, C >, and 
Y = < C, A, D, B, C, B > 
The length of longest common subsequence of X and Y is :
  • a)
    5
  • b)
    3
  • c)
    4
  • d)
    2
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Consider the following two sequences :X = < B, C, D, C, A, B, C >...
Initially, We check for length 5 sub-sequence between both given sequences but couldn't find. Then checked for length 4 sub-sequences and CDBC and CDCB two sub-sequences found.
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Most Upvoted Answer
Consider the following two sequences :X = < B, C, D, C, A, B, C >...
1, 2, 3, 4, 5

Y = 1, 4, 9, 16, 25

X is a sequence of consecutive natural numbers starting from 1, while Y is a sequence of the square of those natural numbers.
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