> #include<iostream>
> #include<string.h>
> using namespace std;
> int a[200010];
> int b[200010];
> int p[200010];
> int main()
> {
>     int n,k;
>     int i,j;
>     while(cin>>n>>k)
>     {
>         memset(a,0,sizeof(a));
>         memset(b,0,sizeof(b));
>         memset(p,0,sizeof(p));
>         a[0]=n;
>         p[n+1]=1;
>         b[0]=0;
>         i=0;
>         j=1;
>         while(i<j)
>         {
>             if(a[i]==k) break;
> 
>             if((a[i]-1)>=0&&!p[a[i]])
>             {
>             a[j]=(a[i]-1);
>             b[j]=b[i]+1;
>             ++j;
>             }
>             if((a[i]+1)<=100000&&!p[a[i]+2])
>             {
>             a[j]=(a[i]+1);
>             b[j]=b[i]+1;
>             ++j;
>             }
>             if((2*a[i])<=100000&&!p[a[i]*2+1])
>             {
>             a[j]=2*a[i];
>             b[j]=b[i]+1;
>             ++j;
>             }
>             
>             i++;
>         }
>         cout<<b[i]<<endl;
> 
> 
>     }
> 
> 
> 
>     return 0;
> }