1837. Sum of Digits in Base K

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.

class Solution {
public:
    int sumBase(int n, int k) {
        vector<int> base;
        while(n) {
            base.push_back(n%k);
            n /= k;
        }
        int res = 0;
        for(auto& num : base) {
            res += num;
        }

        return res;
    }
};