#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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