int main(void)
{
  int k,a,b,i;
  scanf("%d",&k);
  i=k;
  scanf("%d %d",&a,&b);
  int count=0;
  while(k<=b)
  {
     if(a<=k && k<=b)
     { 
       count=count+1;
     }
    k=k+i;
  }
  if(count>0)
  {
     printf("Yes");
  }
  else if(count==0)
  {
    printf("NG");
  }
  
}