#include "books.h"
#include<bits/stdc++.h>
using namespace std;
#define fall(i,a,b) for(int i=a;i<=b;i++)
#define rfall(i,a,b) for(int i=a;i>=b;i--)
#define pb push_back
#define all(x) x.begin(),x.end()
#define sz(x) (int)x.size()
typedef tuple<int,vector<int>,int> trio;
long long minimum_walk(std::vector<int> p, int s){
int n=sz(p),lp=0;
fall(i,0,n-1) if(i!=p[i]) lp=i;
vector<int> cur(n); iota(all(cur),0);
int ans=0;
fall(i,0,lp-1){
ans++;
bool foi=1;
fall(j,0,n-1){
if(cur[j]==i && p[j]>i){
cur[j]++;
if(!foi) ans+=2;
foi=0;
}
}
fall(j,0,n-1){
if(cur[j]==i && p[j]<i && !foi) cur[j]--;
}
}
rfall(i,lp,1){
ans++;
bool foi=1;
fall(j,0,n-1){
if(cur[j]==i && p[j]<i){
cur[j]--;
if(!foi) ans+=2;
foi=0;
}
}
}
return ans;
}
