Problem Brief
Count Four-Digit Codes with Sum S
INTERNOA
Consider all codes made of four digits (0-9). How many of them have a sum of digits equal to S? For example, for S = 4, there are 35 such codes in total. Some of them are 0022, 1003, 1111, 2020, 4000.
Write a function in the editor ๐
that, given an integer S, returns the number of four-digit codes whose sum of digits is equal to S.
Assume that:
Sis an integer within the range[0..36]
In your solution, focus on correctness. The performance of your solution will not be the focus of this assessment.
โน เฃช ๏น๐๏น๐ ๐๐ธA heartfelt thanks to Aura Man!~~๐๏นโน เฃช
1Example 1
Input
S = 35
Output
4
Explanation
The posible code are 9998, 9989, 9899, 8999, The function should return 4 :)
2Example 2
Input
S = 4
Output
35
Explanation
Google says there is no explanation ๐ฑ
3Example 3
Input
S = 2
Output
10
Explanation
Google expects us to know the explanation by this point ๐ป
Constraints
Limits and guarantees your solution can rely on.
S is an integer within the range [0..36].