#include <stdio.h>
int fan(int n){
int h,k=10;
int count=0;
do{
h = n%k;
k=k*10;
count ++;
}while(h == 0);
int sum,i,e,j=10,t;
for(i=0; i<(count-1); i++){
j=j*10;
}
for(i=0; i<(count-1); i++){
t = e;
e = n%j;
sum += t;
n -= e*j;
j = j/10;
}
return sum;
}
int main(void) {
int f;
return 0;
}
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