#include<stdio.h>
void f(int n,int sum){
int k =0,j=0;
if(n==0)
return ;
k =n%10;
j=n/10;
sum+=k;
f(j,sum);
printf("%d",k);
}
int main(){
int a =2048,sum=0;
f(a,sum);
printf("%d",sum);
}
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