Submission #1076182

#	Time	Username	Problem	Language	Result	Execution time	Memory
1076182		NeroZein	Ancient Books (IOI17_books)	C++17	50 / 100	587 ms	38516 KiB

books

#include <bits/stdc++.h>
#include "books.h"
 
using namespace std;
 
long long minimum_walk(vector<int> p, int s) {
	int n = (int) p.size();
	set<int> se;
	long long ans = 0;
	vector<bool> b(n);
	for (int i = 0; i < n; i++) {
		ans += abs(i - p[i]);
		se.insert(p[i]);
		if (se.count(i)) {
			se.erase(i);
		}
		if (se.size() == 0 || *se.rbegin() <= i) {
			b[i] = 1;
		}
	}
	bool f = 0;
	for (int i = n - 1; i >= 0; i--) {
		if (f && b[i]) {
			ans += 2;
		}
		if (p[i] != i) {
			f = 1;
		}
	}
	return ans;
}

• Subtask 1: 12 / 12
• Subtask 2: 10 / 10
• Subtask 3: 28 / 28
• Subtask 4: 0 / 20
• Subtask 5: 0 / 30