#include <stdio.h>
int main(void) {
int n,i,j,k,sum;
sum=0;
for (i=n;i!=1;sum=0){
for (j=i;j!=0;j/=10){
k=j%10;
sum+=k*k;
}
i=sum;
if(i==n){
return 0;
}
}
return 0;
}
I2luY2x1ZGUgPHN0ZGlvLmg+CgppbnQgbWFpbih2b2lkKSB7CglpbnQgbixpLGosayxzdW07CglzdW09MDsKCQoJc2NhbmYoIiVkXG4iLCZuKTsKCQoJZm9yIChpPW47aSE9MTtzdW09MCl7CgkJZm9yIChqPWk7aiE9MDtqLz0xMCl7CgkJaz1qJTEwOwoJCXN1bSs9ayprOwoJCX0KCQlpPXN1bTsKCQlpZihpPT1uKXsKCQkJcHJpbnRmKCLjg4/jg4Pjg5Tjg7zjg4rjg7Pjg5Djg7zjgafjga/jgYLjgorjgb7jgZvjgpPjgIIiKTsKCQkJcmV0dXJuIDA7CgkJfQoJCQoJfQoJcHJpbnRmKCLjg4/jg4Pjg5Tjg7zjg4rjg7Pjg5Djg7zjgafjgZnjgIIiKTsKCQoJcmV0dXJuIDA7Cn0K