Let us see how to print an inverted heart pattern in Python.

Example:

Input: 11
Output:

          *
         ***
        *****
       *******
      *********
     ***********
    *************
   ***************
  *****************
 *******************
*********************
 *********  ********
  *******    ******
   *****      **** 
   
Input: 15
Output:
              *
             ***
            *****
           *******
          *********
         ***********
        *************
       ***************
      *****************
     *******************
    *********************
   ***********************
  *************************
 ***************************
*****************************
 *************  ************
  ***********    **********
   *********      ********
    *******        ******

Approach:

1. Determine the size of the heart.
2. Print an inverted triangle with size number of rows.
3. Print the rest of the heart in 4 segments inside another loop.
4. Print the white space right-triangle at the beginning.
5. Print the first trapezium with stars.
6. Print the white space triangle.
7. Print the second trapezium with stars.

# determining the size of the heart
size = 15

# printing the inverted triangle
for a in range(0, size):
    for b in range(a, size):
        print(" ", end = "")
    for b in range(1, (a * 2)): 
        print("*", end = "") 
    print("")

# printing rest of the heart
for a in range(size, int(size / 2) - 1 , -2):

    # printing the white space right-triangle
    for b in range(1, size - a, 2):  
        print(" ", end = "")

    # printing the first trapezium
    for b in range(1, a + 1): 
        print("*", end = "")

    # printing the white space triangle
    for b in range(1, (size - a) + 1): 
        print(" ", end = "")

    # printing the second trapezium
    for b in range(1, a): 
        print("*", end = "")

    # new line
    print("")

Output:

              *
             ***
            *****
           *******
          *********
         ***********
        *************
       ***************
      *****************
     *******************
    *********************
   ***********************
  *************************
 ***************************
*****************************
 *************  ************
  ***********    **********
   *********      ********
    *******        ******

 Time complexity: O(S²) for given input size S

Auxiliary Space: O(1)