#9300: 解析參考


simultaneously (----------以上是高手------------)


#include<cstdio>
#include<cstring>
int main(){
    char x[10000];
    while(~scanf("%s",&x)){
    if(strcmp(x,"0")==0) break;
    int y=1,sum=0,s=strlen(x);
   for(int i=0;i<s;i++) sum+=x[i]-'0';
  while(!(sum%9)){
    if(sum==9) break;  
      int sum1=0;
    while(sum){sum1+=sum%10,sum/=10;}             
      sum=sum1,y++;
    
      }            
   if(sum%9) printf("%s is not a multiple of 9.",x);
   else printf("%s is a multiple of 9 and has 9-degree %d.",x,y);
  printf("\n");
}}