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The algorithm reverse (1st) below reverses a list in place. More precisely, it satisfies the following precondition/postcondition pair: Precondition: 1st is an array of any length Postcondition: Ist upon completion of this algorithm, is mutated to the reversed list. For example, if the list prior reversal is [1, 2, 3], after the algorithm is completed, the content of the list is [3, 2, 1]. functon reverse (1st): n = len(1st) i, j = 0, n-1 while i <= j: swap (1st [i], 1st[j]) i = i + 1 jj-1 Provide a complete proof of correctness of this algorithm performing all four steps.

The algorithm reverse (1st) below reverses a list in place. More precisely, it satisfies the following precondition/postcondition pair: Precondition: 1st is an array of any length Postcondition: Ist upon completion of this algorithm, is mutated to the reversed list. For example, if the list prior reversal is [1, 2, 3], after the algorithm is completed, the content of the list is [3, 2, 1]. functon reverse (1st): n = len(1st) i, j = 0, n-1 while i <= j: swap (1st [i], 1st[j]) i = i + 1 jj-1 Provide a complete proof of correctness of this algorithm performing all four steps.

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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The algorithm reverse(lst) below reverses a list in place. More precisely,
it satisfies the following precondition/postcondition pair:
Precondition: lst is an array of any length
Postcondition: lst upon completion of this algorithm, is mutated to the reversed
list. For example, if the list prior reversal is [1, 2, 3], after the algorithm is completed,
the content of the list is [3, 2, 1].
functon reverse(lst):
    n = len(lst)
    i, j = 0, n-1
    while i <= j:
        swap(lst[i], lst[j])
        i = i + 1
        j = j - 1
Provide a complete proof of correctness of this algorithm performing all four
steps.

The algorithm reverse (1st) below reverses a list in place. More precisely, it satisfies the following precondition/postcondition pair: Precondition: 1st is an array of any length Postcondition: Ist upon completion of this algorithm, is mutated to the reversed list. For example, if the list prior reversal is [1, 2, 3], after the algorithm is completed, the content of the list is [3, 2, 1]. functon reverse (1st): n = len(1st) i, j = 0, n-1 while i <= j: swap (1st [i], 1st[j]) i = i + 1 jj-1 Provide a complete proof of correctness of this algorithm performing all four steps.
Transcribed Image Text:The algorithm reverse (1st) below reverses a list in place. More precisely, it satisfies the following precondition/postcondition pair: Precondition: 1st is an array of any length Postcondition: Ist upon completion of this algorithm, is mutated to the reversed list. For example, if the list prior reversal is [1, 2, 3], after the algorithm is completed, the content of the list is [3, 2, 1]. functon reverse (1st): n = len(1st) i, j = 0, n-1 while i <= j: swap (1st [i], 1st[j]) i = i + 1 jj-1 Provide a complete proof of correctness of this algorithm performing all four steps.
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