Python: Find the specified number of largest products from two given list, multiplying an element from each list

Last update on April 19 2025 12:58:16 (UTC/GMT +8 hours)

Largest Products from Two Lists

Write a Python program to find the specified number of largest products from two given lists, multiplying an element from each list.

Visual Presentation:

Sample Solution:

Python Code:

# Define a function called 'top_product' that returns the N largest products from two lists.
def top_product(nums1, nums2, N):
    # Create a list of products of all combinations of elements from 'nums1' and 'nums2'.
    product_list = [x * y for x in nums1 for y in nums2]
    # Sort the product list in descending order.
    result = sorted(product_list, reverse=True)[:N]
    return result

# Create two lists 'nums1' and 'nums2' containing integers.
nums1 = [1, 2, 3, 4, 5, 6]
nums2 = [3, 6, 8, 9, 10, 6]

# Print a message indicating the original lists.
print("Original lists:")
# Print both lists 'nums1' and 'nums2'.
print(nums1)
print(nums2, "\n")

# Set the value of 'N' to 3.
N = 3
# Print the value of 'N' and a message indicating the number of largest products from the two lists.
print(N, "Number of largest products from the said two lists:")
# Call the 'top_product' function with 'nums1', 'nums2', and 'N', then print the result.
print(top_product(nums1, nums2, N))

# Set the value of 'N' to 4.
N = 4
# Print the value of 'N' and a message indicating the number of largest products from the two lists.
print(N, "Number of largest products from the said two lists:")
# Call the 'top_product' function with 'nums1', 'nums2', and 'N', then print the result.
print(top_product(nums1, nums2, N))

Sample Output:

Original lists:
[1, 2, 3, 4, 5, 6]
[3, 6, 8, 9, 10, 6] 

3 Number of largest products from the said two lists:
[60, 54, 50]
4 Number of largest products from the said two lists:
[60, 54, 50, 48]

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to find the top N largest products from two lists, ensuring that each element is used only once.
• Write a Python program to compute the largest products from two lists where each product must be even.
• Write a Python program to determine the largest products from two lists after sorting both lists in ascending order.
• Write a Python program to find the largest products from two lists when one list contains negative numbers.

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