Instructions Create a program that contains a function append_combine(x, a) where x is a list of integers and a is an integer. Aside from appending a to list x , the function should also check if the number at the end of list before appending a are equal. If they are, then these two values should be combined instead. Combining should be done repeteadly until there are no more consecutive pairs in the list. See example below. Example test cases x = [] append_combine(x, 1) # [1] append_combine(x, 2) # -> [1, 2] append_combine(x, 2) # -> [1, 2, 2] -> [1, 4] append_combine(x, 2) # -> [1, 4, 2] append_combine(x, 2) # -> [1, 4, 2, 2] -> [1, 4, 4] -> [1, 8] append_combine(x, 3) # -> [1, 8, 3] append_combine(x, 2) # -> [1, 8, 3, 2] append_combine(x, 4) # -> [1, 8, 3, 2, 4] append_combine(x, 4) # -> [1, 8, 3, 2, 4, 4] -> [1, 8, 3, 2, 8] # Final value of x is [1, 8, 3, 2, 8]

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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Instructions
Create a program that contains a function append_combine(x, a) where
x is a list of integers and a is an integer. Aside from appending a to list
x , the function should also check if the number at the end of list before
appending a are equal. If they are, then these two values should be
combined instead. Combining should be done repeteadly until there are no
more consecutive pairs in the list. See example below.
Example test cases
X =
[]
append_combine(x, 1) # [1]
append_combine(x, 2) # -> [1, 2]
append_combine(x, 2) # -> [1, 2, 2] -> [1, 4]
append_combine(x, 2) # -> [1, 4, 2]
append_combine(x, 2) # -> [1, 4, 2, 2] -> [1, 4, 4] -> [1, 8]
append_combine (x, 3) # -> [1, 8, 3]
append_combine(x, 2) # -> [1, 8, 3, 2]
append_combine(x, 4) # -> [1, 8, 3, 2, 4]
append_combine(x, 4) # -> [1, 8, 3, 2, 4, 4] -> [1, 8, 3, 2, 8]
# Final value of x is [1, 8, 3, 2, 8]
Transcribed Image Text:Instructions Create a program that contains a function append_combine(x, a) where x is a list of integers and a is an integer. Aside from appending a to list x , the function should also check if the number at the end of list before appending a are equal. If they are, then these two values should be combined instead. Combining should be done repeteadly until there are no more consecutive pairs in the list. See example below. Example test cases X = [] append_combine(x, 1) # [1] append_combine(x, 2) # -> [1, 2] append_combine(x, 2) # -> [1, 2, 2] -> [1, 4] append_combine(x, 2) # -> [1, 4, 2] append_combine(x, 2) # -> [1, 4, 2, 2] -> [1, 4, 4] -> [1, 8] append_combine (x, 3) # -> [1, 8, 3] append_combine(x, 2) # -> [1, 8, 3, 2] append_combine(x, 4) # -> [1, 8, 3, 2, 4] append_combine(x, 4) # -> [1, 8, 3, 2, 4, 4] -> [1, 8, 3, 2, 8] # Final value of x is [1, 8, 3, 2, 8]
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