#include "books.h"
#include <bits/stdc++.h>
using namespace std;
#define ll long long
ll minimum_walk(vector<signed> p, signed s) {
int n = (int) p.size();
vector<int> v(1 + n, 0);
for(int i = 1; i <= n; i++) {
v[i] = p[i - 1] + 1;
}
s++;
ll ans = 0;
vector<int> cnt(1 + n, 0);
for(int i = 1; i <= n; i++) {
ans += abs(i - v[i]);
int a = i, b = v[i];
if(a > b) {
swap(a, b);
}
cnt[a]++;
cnt[b]--;
}
int k = 0;
for(int i = 1; i <= n; i++) {
if(v[i] != i) {
k = i;
}
}
int cur = 0;
for(int i = 1; i <= n; i++) {
cur += cnt[i];
if(i <= k - 1 && cur == 0) {
ans += 2;
}
}
return ans;
}
