#include "books.h" #include <bits/stdc++.h> using namespace std; long long minimum_walk(std::vector<int> p, int s) { long long res = 0; vector<int> pre(p.size(), 0); for (int i = 0; i < p.size(); i++) { res += abs(i - p[i]); int l = min(i, p[i]); int r = max(i, p[i]); pre[l]++; pre[r]--; } int last = p.size() - 1; while (last >= 0 && p[last] == last) { last--; } for (int i = 0; i < last; i++) { pre[i + 1] += pre[i]; if (pre[i] == 0) { res += 2; } } return res; }

books.cpp: In function 'long long int minimum_walk(std::vector<int>, int)':
books.cpp:10:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |     for (int i = 0; i < p.size(); i++) {
      |                     ~~^~~~~~~~~~