#include "books.h"
#include<bits/stdc++.h>
#define vi vector<int>
#define vb vector<bool>
#define pii pair<int,int>
#define vpii vector<pair<int,int>>
#define vvi vector<vi>
#define mp make_pair
#define pb push_back
#define f0r(i,n) for(int i = 0; i<n; i++)
#define FOR(i, k, n) for(int i = k; i<n; i++)
#define dout(x) cout<<x<<' '<<#x<<endl;
#define vout(x) for(auto u : x)cout<<u<<' '; cout<<endl;
using namespace std;
long long minimum_walk(std::vector<signed> p, signed s) {
int n = p.size();
int ans = 0;
vb vis(n);
vpii rngs;
f0r(i,n){
if(!vis[i]){
if(p[i] == i){
vis[i] = 1;
}
else{
int cur = p[i]; ans += abs(cur - i); vis[cur] = 1; int mxc = cur;
while(cur != i){
int ori = cur; cur = p[cur]; vis[cur] = 1;
ans += abs(ori - cur); mxc = max(mxc, cur);
}
rngs.pb(mp(i, mxc));
}
}
}
sort(rngs.begin(), rngs.end());
int res = 0;
int pv = 0;
f0r(i, rngs.size()){
if(pv < rngs[i].first){
res += rngs[i].first - pv;
}
pv = rngs[i].second;
}
res *= 2;
ans += res;
return ans;
}
