#include <stdio.h>
int Summa(long long int a){
static long long int m,n;
long long int c,g;
n++;
c=a%10;
a=a/10;
m=m+c;
if (a==0){
m=m-n;
return m ;
}
g=Summa(a);
return m;
}
int main() {
long long int a,b;
b = Summa(a);
return 0;
}
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