Write a Python function that receives a stack object s, where the items in the stack...

Write a Python function that receives a stack object s, where the items in the stack are only numbers in the set {0,1} and returns the number of 1's in the stack s. The function must satisfy the following restrictions:

the state of the stack must be preserved; ie., after calling this function the state of the stack s must be the same it was before the function was called.
The function cannot use any additional variables of any of the collection types such as lists, stacks, dictionaries, strings etc.
The function cannot use any global variables.
Since the implementation of Stack is not known you must use the API given in the Table 1.

For example, if the stack contains 0,0,1,1,0,1,0, the function must return 3 and the stack must still contain 0,0,1,1,0,1,0.

Expert Solution

Raw_code:

def function(stack):
# temporary variable of integer type (non-collection type)
count = 0
# for loop for iterating through each element in the stack using membership in operator
for number in stack:
# if statement for checking whether the number is 1 or
if number == 1:
# if number is 1 incrementing the count of 1
count += 1
# after breaking of for loop returning count
else:
return count

stack1 = [0, 0, 1, 1, 0, 1, 0]
# calling the function with stack as parameter
print(function(stack1))
print(stack1)

stack2 = (0, 0, 1, 1, 0, 1, 1, 0)
print(function(stack2))
print(stack2)

venereology answered 2 months ago

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