# Python: Reads n digits chosen from 0 to 9 and prints the number of combinations where the sum of the digits equals to another given number(s)

## Python Basic - 1: Exercise-48 with Solution

Write a Python program that reads n digits (given) chosen from 0 to 9 and prints the number of combinations where the sum of the digits equals another given number (s). Do not use the same digits in a combination.

**Input:**

Two integers as number of combinations and their sum by a single space in a line. Input 0 0 to exit.

**Sample Solution**:

**Python Code:**

```
import itertools
print("Input number of combinations and sum, input 0 0 to exit:")
while True:
x, y = map(int, input(). split())
if x == 0 and y == 0:
break
s = list(itertools.combinations(range(10), x))
ctr = 0
for i in s:
if sum(i) == y:
ctr += 1
print(ctr)
```

Sample Output:

Input number of combinations and sum, input 0 0 to exit: 5 6 2 4 0 0 2

**Flowchart:**

**Python Code Editor:**

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