#include"stdio.h"
long f(long );
long min(long ,long ,long );
long m,n;
void main()
{
  scanf("%ld%ld",&m,&n);
    printf("%ld",f(m));
  getch();
}

long f(long m)
{
 if(m>=n)
 return (m-n);

   return (min(1+f(m+1),1+f(m-1),1+f(2*m)));
}

long min(long a,long b,long c)
{
  long min;
  min=a;
  if(b<min)
  min=b;
  if(c<min)
  min=c;
  return min;
}