Here is my program. Throws an error number 3. Tested for n = 10 ^ 9 and n = 0. I can not understand.


#include <iostream>
#include <conio.h>
using namespace std;
main()
{
 long long int a=0,b=0,c=0,n=0,m[10001],d=0;
 cin >> n;
 if (n==0) goto qwerty;
 for (a=9;a>=1;a--)

   while (n % a == 0)
   {
     if ((a==1) && (b>1)) break;
     n/=a;
     b++;
     m[b]=a;
   }
 if (n==1)
 {
 for (a=1;a<=b;a++) for (c=1;c<b;c++)
   if (m[c]>m[c+1]) { m[c]+=m[c+1]; m[c+1]=m[c]-m[c+1]; m[c]-=m[c+1];}
 d=1;
 n=0;
 for (a=b;a>=1;a--) { m[a]*=d; d*=10; n+=m[a]; }
 cout << n;
 }
 else cout << -1;
 qwerty:
 if (n==0) cout << -1;
 getch();
}

Edited by author 09.11.2013 21:58

n=1

Have a look at the case n=1