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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