#include <iostream>

  using namespace std;


  int main()
  {
   int a,b,k=0,c,n,i;
   cin»n;
   int g[n];
   for (i=0; i<n; i++)
   cin»g[i];
   for (i=0; i<n+1; i++)
   if (g[i]>g[i+1]) {b=g[i+1]; g[i+1]=g[i]; g[i]=b; i=-1;}
   a=g[0];
   b=g[1];
   while(a>0 && b>0)
   if(a>b)
   {a%=b; k++;}
   else
   {b%=a; k++;}
   c=a+b;
   for (i=2; i<n-1; i++){
   a=g[i];
   b=g[i+1];
   while (a>0 && b>0)
   if(a>b)
   {a%=b; k++;}
   else
   {b%=a; k++;}
   if (c%(a+b)==0) c=a+b;
   else
   if ((a+b)%c==0) {c++; c--;}
   else { c=0;
   break;}
   }
   if (c!=0) cout«c«' '«k;
   else cout«"NO";
   return 0;
  }

  //6 126 36 45 90 27 63