//#include "books.h"
#include <bits/stdc++.h>
#define mp make_pair
#define f first
#define s second
#define sz(x) (int)(x).size()
#define rsz resize
#define ins insert
#define ft front()
#define bk back()
#define pf push_front
#define pb push_back
#define eb emplace_back
#define lb lower_bound
#define ub upper_bound
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int,int> pi;
typedef pair<ll,ll> pl;
typedef vector<int> vi;
typedef vector<bool> vb;
typedef vector<ll> vl;
typedef vector<pi> vpi;
typedef vector<pl> vpl;
ll minimum_walk(vector<int> p, int s)
{
int ind=-1;
int sum=0;
for (int i=0;i<sz(p);i++)
{
if (p[i]!=i)
{
ind=i;
break;
}
sum++;
}
if (ind==-1)return 0;
ll res=ind;
int onki=0;
while(sum<=sz(p))
{
res+=abs(ind-onki);
onki=ind;
ind=p[ind];
sum++;
}
return res;
}
