Python 程序创建两个未排序列表的已排序合并列表

此处给出两个用户输入列表，两个列表的元素未排序。我们的任务是合并这两个未排序数组，然后对列表进行排序。

示例

Input: A [] = {100, 50, 150}
       B [] = {200, 30, 20}
Output: Merge List:{20, 30, 50, 100, 150, 200}

算法

Step 1: first we create two user input list.
Step 2: Final merge list size is (size of the first list + the size of the second list).
Step 3: then sort two list using sort() method.
Step 4: Merge two sorted list and store it into a third list.
Step 5: Merging remaining elements of a[] (if any).Merging remaining elements of b[] (if any).
Step 6: display merged sorted list.

示例代码

# Python program to merge two unsorted lists 
# in sorted order
# Function to merge array in sorted order
def unsortedarray (a, b, res, n, m):
   # Sorting a[] and b[]
   a.sort()
   b.sort()
   # Merge two sorted arrays into res[]
   i, j, k = 0, 0, 0
   while (i < n and j < m):
      if (a[i] <= b[j]):
         res[k] = a[i]
         i += 1
         k += 1
      else:
         res[k] = b[j]
         j += 1
         k += 1
   while (i < n):  # Merging remaining
      # elements of a[] (if any)
      res[k] = a[i]
      i += 1
      k += 1
   while (j < m):  # Merging remaining
      # elements of b[] (if any)
      res[k] = b[j]
      j += 1
      k += 1
# Driver code
A=list()
n=int(input("Enter the size of the First List ::"))
print("Enter the Element of First List ::")
for i in range(int(n)):
   k=int(input(""))
   A.append(k)
B=list()
m=int(input("Enter the size of the Second List ::"))
print("Enter the Element of Second List ::")
for i in range(int(n)):
   k=int(input(""))
   B.append(k)
# Final merge list
res = [0 for i in range(n + m)]
unsortedarray(A, B, res, n, m)
print ("Sorted merged list :")
for i in range(n + m):
   print (res[i],)

输出

Enter the size of the First List: 4
Enter the Element of First List::
8
79
56
3
Enter the size of the Second List: 4
Enter the Element of Second List::
67
1
9
45
Sorted merged list:
1
3
8
9
45
56
67
79

更新时间： 30-7-2019

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