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1837. Sum of Digits in Base K

Difficulty Topics

Description

Given an integer n (in base 10) and a base k, return the sum of the digits of n after converting n from base 10 to base k.

After converting, each digit should be interpreted as a base 10 number, and the sum should be returned in base 10.

 

Example 1:

Input: n = 34, k = 6
Output: 9
Explanation: 34 (base 10) expressed in base 6 is 54. 5 + 4 = 9.

Example 2:

Input: n = 10, k = 10
Output: 1
Explanation: n is already in base 10. 1 + 0 = 1.

 

Constraints:

  • 1 <= n <= 100
  • 2 <= k <= 10

Solution

sum-of-digits-in-base-k.py
class Solution:
    def sumBase(self, n: int, k: int) -> int:
        res = 0

        while n > 0:
            res += n % k
            n //= k

        return res