#include <stdio.h>
#include <stdlib.h>
#include <math.h>

int main(int argc, char *argv[])
{ int x, n, prov, ost, i; 
  n=-1;
  i=0;
  x=0;
  prov=0;
  ost=0;
  while (n<1)
    {
       printf(" vvedite celoe N bolshe 0. N= ");  
       scanf("%d", &n );
    }
  printf(" chislo N v proverke na '7' ychastia ne prinimaet "); 
  for (i=0; i<n; i++)
    {
       printf(" vvedite celoe chislo ");  
       scanf("%d", &x );
       if (prov==0 && x!=0)
         {
           if (x%7==0)
             prov++;
           else 
             {
               x=abs(x);
               while (x>1 && prov==0)
                {
                  ost=x%10;  
                  x-=ost;  
                  x/=10;  
                  if (ost%7==0)
                    prov++;  
                }
             } 
         }
     }
  if (prov==1) 
      printf(" da");    
  else                            
      printf(" nety");                
  system("PAUSE");	
  return 0;
}