int s,t;
s=0; do { t=w%10; s+=t*t; w/=10; } while ( w!=0 );
if ( s%5==0 ) return 1; else return 0;
int i=0;
int r = 0;
do
{
i = w % 10;
w = w / 10;
r = r+ i * i;
} while(w > 0);
if(r % 5 == 0)
{
return 1;
}
else
{
return 0;
}