def cumulative_sum(L):
C = sll.List()
Sum = 0
t = L.head
while t != None:
Sum += t.data
C.append(Sum)
t = t.next
return C
def cumulative_sum(L):
C = sll.List()
t = L.head
cumsum = 0
while t != None:
cumsum += t.data
C.append(cumsum)
t = t.next
return C
def zero2n(n):
L = sll.List()
if n < 0:
return L
for i in range(0, n + 1):
L.append(i)
return L
def smaller_than(L, x):
smaller_list = sll.List()
smaller_list.head = smaller_than_n(L.head, x)
if smaller_list.head == None:
smaller_list.tail = None
else:
t = smaller_list.head
while t.next != None:
t = t.next
smaller_list.tail = t
return smaller_list
def select_modified_quicksort(L, k):
arr = []
t = L.head
while (t != None):
arr.append(t.data)
t = t.next
quicksort_one_call(arr, 0, len(arr) - 1)
L = sll.List()
for i in arr:
L.append(i)
return length_of_L(L, k)
for L in [L2a, L2b, L2c]:
print('Input:',L,k,'Result:',greater_than(L,k))
L = L2c
for k in range(10):
print('Input:',L,k,'Result:',greater_than(L,k))
print('\nQuestion 3')
L1 = [5,5,5,6,5,5,8]
for i in range(len(L1)+1):
L = L1[:i]
print('Input list:',L,'Result:',all_equal(L))
print('\nQuestion 4')
L4 = [7, 4, 1, 2, 8, 9, 3]
for i in range(len(L4)+1):
L = sll.List()
L.extend(L4[:i])
print('Original list:',end=' ')
L.print()
print('Resulting list:',end=' ')
swap_second_and_last(L)
L.print()
print('\nQuestion 5')
L5 = sll.List()
L5.extend([7, 5, 4, 1, 2])
print('Input list:',end=' ')
L5.print()
for k in range(10):
print('k:',k,'Result:',find(L5,k))
if __name__ == "__main__":
plt.close('all')
print('Question 1')
L1 = zero2n(-9)
L1.print()
L1 = zero2n(0)
L1.print()
L1 = zero2n(1)
L1.print()
L1 = zero2n(5)
L1.print()
print('Question 2')
L2 = sll.List()
L2.extend([3, 6, 1, 4, 0, 9, 7, 4, 8, 5, 9, 7, 19])
print(appears(L2, 0))
print(appears(L2, 10))
print(appears(L2, 19))
print('Question 3')
L2 = sll.List()
L2.extend([3, 6, 1, 4, 0, 9, 7, 4, 8, 5, 9, 7, 19])
print(appears_loop(L2, 0))
print(appears_loop(L2, 10))
print(appears_loop(L2, 19))
L1 = sll.List()
L2 = sll.List()
L2.append(2)
def sum_list(t):
t = t.head
sum_l = 0
while t != None:
sum_l += t.data
t = t.next
return sum_l
if __name__ == "__main__":
plt.close('all')
L1 = sll.List()
L1.print()
L1.draw()
L2 = sll.List()
L2.extend([3, 6, 1, 0, 9, 7, 4, 8, 5])
L2.print()
L2.draw()
L3 = sll.List()
L3.append(2)
L3.print()
L3.draw()
print('Question 1')
print(first(L1))
else:
d[i, j] = 1 + min(d[i, j + 1], d[i + 1, j + 1], d[i + 1, j])
return d
if __name__ == "__main__":
plt.close("all")
draw_figs = False # Change to True to output figures to screen
print('================ Question 1 ===============')
L2 = [1, 7, 4, 3, 0, 9, 2, 5, 8, 6]
print(smaller(L2, 3))
print(smaller(L2, 6))
print(smaller(L2, 9))
print('================ Question 2 ===============')
L3a = sll.List()
L3b = sll.List()
L3c = sll.List()
L3d = sll.List()
L3b.extend([5])
L3c.extend([7, 8])
L3d.extend([3, 0, 9, 2, 5])
for L in [L3a, L3b, L3c, L3d]: # Show original lists
L.print()
if draw_figs:
L.draw('Original list')
for L in [L3a, L3b, L3c, L3d]:
remove_second(L)
for L in [L3a, L3b, L3c, L3d]: # Show modified lists
def random_list(n):
L = sll.List()
L.extend(list(np.random.randint(0, high=10 * n, size=n, dtype=int)))
return L
def substract_data(L,n):
if __name__ == "__main__":
plt.close('all')
print('~~~~~~~~~~~~~~~ Problem 1 ~~~~~~~~~~~~~~~')
print(remove_consonants('')) # ' '
print(remove_consonants('Hello, World!')) # eo o
print(remove_consonants('Diego Aguirre')) # ieo Auie
print(remove_consonants('Computer Science')) # oue iee
print('~~~~~~~~~~~~~~~ Problem 2 ~~~~~~~~~~~~~~~')
print(cumulative_sum(0)) # 0
print(cumulative_sum(3)) # 6
print(cumulative_sum(10)) # 55
print('~~~~~~~~~~~~~~~ Problem 3 ~~~~~~~~~~~~~~~')
print(sum_digits_even(222)) # 6
print(sum_digits_even(101)) # 0
print(sum_digits_even(102)) # 2
print(sum_digits_even(274)) # 6
print('~~~~~~~~~~~~~~~ Problem 4 ~~~~~~~~~~~~~~~')
print(palindrome('Racecar')) # True
print(palindrome('12121')) # True
print(palindrome('Anne')) # False
print(palindrome('Was it a cat I saw?')) # True
print(palindrome('Cs2302')) # False
print('~~~~~~~~~~~~~~~ Problem 5 ~~~~~~~~~~~~~~~')
print(multiply(2,3)) # 6
print(multiply(10,12)) # 120
print(multiply(27,98)) # 2646
print('~~~~~~~~~~~~~~~ Problem 6 ~~~~~~~~~~~~~~~')
print(num_ways(0)) # 1
print(num_ways(2)) # 2
print(num_ways(5)) # 13
print(num_ways(10)) # 274
print('~~~~~~~~~~~~~~~ Problem 7 ~~~~~~~~~~~~~~~')
L1 = sll.List()
L1.extend([3,6,1,0,9,7,4,8,5])
print('Before: ',end='')
L1.print()
L1.draw()
remove_first_and_last(L1)
print('After: ',end='')
L1.print() # [6, 1, 0, 9, 7, 4, 8]
L1.draw()
print('~~~~~~~~~~~~~~~ Problem 8 ~~~~~~~~~~~~~~~')
L2 = sll.List()
L2.extend([5,2,8,4,1])
L2.print()
L2.draw()
return_kth_to_last(L2.head,1) # 1
return_kth_to_last(L2.head,2) # 4
return_kth_to_last(L2.head,5) # 5
print('~~~~~~~~~~~~~~~ Problem 9 ~~~~~~~~~~~~~~~')
L3 = sll.List()
L3.extend([3,2,1])
print('Original: ',end='')
L3.print()
L3.draw()
reverse(L3)
print('Reversed: ',end='')
L3.print()# 1 -> 2 -> 3
L3.draw()
print('~~~~~~~~~~~~~~~ Problem 10 ~~~~~~~~~~~~~~~')
substract_data(L1,10)
L1.print() # [-4, -9, -10, -1, -3, -6, -2]
substract_data(L2,5)
L2.print() # [0, -3, 3, -1, -4]
substract_data(L3,20)
L3.print() # [-19, -18, -17]
def middle(L):
t, mid, advance = L.head, L.head, False
while t != None:
t = t.next
if advance:
mid = mid.next
advance = ~advance
return mid.data
if __name__ == "__main__":
plt.close('all')
L3 = sll.List()
L3.extend([3, 6, 1, 4, 0, 9, 7, 4, 8, 5, 9, 7, 9])
L3.print()
L3.draw()
print('Question 10')
S1 = smaller_than(L3, 6)
S1.print()
S1.draw()
print('Question 11')
print(sum_last_n(L3, 6))
print(sum_last_n(L3, 66))
print('Question 12')
L3 = sll.List()
print(crop(L))
print('Question 2')
print(equal_neighbors([]))
print(equal_neighbors([1]))
print(equal_neighbors([1, 5, 6, 9, 2, 9, 9]))
print(equal_neighbors([1, 5, 6, 9, 2, 9]))
print(equal_neighbors([1, 5, 6, 9, 2, 2, 9, 7]))
print('Question 3')
print(sum_until([], 5))
print(sum_until([1, 5, 6, 9, 2, 3, 7, 8, 4, 2, 9], 6))
print(sum_until([1, 5, 6, 9, 2, 3, 7, 8, 4, 2, 9], 7))
print('Question 4')
L4 = sll.List()
for i in range(7):
L4.print()
print(next_to_last(L4))
L4.append(i * 10)
print('Question 5')
L5 = sll.List()
for i in range(7):
L5.print()
print(all_equal(L5))
L5.append(10)
L5.append(5)
L5.print()
print(all_equal(L5))
L5 = sll.List()
if __name__ == "__main__":
plt.close("all") # Close all figures
fig, ax = plt.subplots()
nested_squares(ax,2,0,0,100)
set_drawing_parameters_and_show(ax)
fig2, ax2 = plt.subplots()
nested_squares(ax2,5,0,0,100)
set_drawing_parameters_and_show(ax2)
print(list_n_to_0(0)) # [0]
print(list_n_to_0(5)) # [5, 4, 3, 2, 1, 0]
L= sll.List()
L.extend([3,6,1,2,5])
L.draw()
print(sum_first_n(L,4)) # 12
print(sum_first_n(L,10)) # 17
print(sum_until(L,3)) # 0
print(sum_until(L,1)) # 9
print(sum_until(L,10)) # 17
L1= sll.List()
print(next_to_last(L1)) # None
print(next_to_last(L)) # 2
# -*- coding: utf-8 -*-
"""
Created on Tue Sep 8 11:27:25 2020
@author: manuelgutierrez
"""
'''
Trace the execution of the following program. Draw the list after every change is performed. Verify your answers
using the code in the List class. No answer submission is necessary.
'''
import singly_linked_list as sll
import matplotlib.pyplot as plt
import math
if __name__ == "__main__":
L = sll.List()
for i in range(5):
L.head = sll.ListNode(i, L.head)
if L.tail == None:
L.tail = L.head
L.tail.data = 9
L.head.data = 8
L.head.next.data = 4
L.head = L.head.next
L.head.next = L.head.next.next
L.head.next = L.tail
L.append(-2)
L.extend([2, 4, 0, 1])
L.print()
print(L.head.data)