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17 changes: 17 additions & 0 deletions algorithms/Maths/Digitsum in Base a
Original file line number Diff line number Diff line change
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#include <bits/stdc++.h>
using namespace std;

#define ll long long int

int digitsum(ll N,int a){
if(N==0) return 0;
int ret=0;
ret+=digitsum(N/a,a)+N%a;
return ret;
}

int main(){
int n,a;
cin>>n>>a;
cout<<digitsum(n,a);
}