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Describe a divide and conquer algorithm to compute the square of an n - digit integer in O ( n log 2 3 ) time,

Describe a divide and conquer algorithm to compute the square of an n-digit
integer in O(n
log2
3
) time, by reducing to the squaring of three n/2-digit integers.
Adding two numbers with k digits, and shifting a number with k digits take O(k)
time.
Your submission should include the following points:
Problem statement. You need not provide an example.
The main idea of the algorithm. Argue the correctness of your algorithm here,
by showing how the algebraic derivations are used by your algorithm.
Algorithm pseudo-code.
Running time analysis. You can directly use the solution of the recurrence
relation worked in class (aka Master Theorem / recursion trees section in the
text).
Hint: use the identity xy =
x
2+y
2(xy)
2
2
.

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