C++ Program To Print Reverse Floyd's Triangle

Floyd’s triangle is a triangle with first natural numbers. Task is to print reverse of Floyd’s triangle.
Examples:

Input: 4
Output:
10 9 8 7
6 5 4 
3 2 
1 

Input: 5
Output:
15 14 13 12 11 
10 9 8 7 
6 5 4 
3 2 
1

28 27 26 25 24 23 22 
21 20 19 18 17 16 
15 14 13 12 11 
10 9 8 7 
6 5 4 
3 2 
1