Submission #1056997

#	Time	Username	Problem	Language	Result	Execution time	Memory
1056997		phoenix	Ancient Books (IOI17_books)	C++17	12 / 100	1 ms	348 KiB

books

#include "books.h"
#include <bits/stdc++.h>

using namespace std;

long long minimum_walk(vector<int> p, int s) {
	int n = (int)p.size();
	long long sum = 0;
	for (int i = 0; i < n; i++) 
		sum += abs(p[i] - i);
	int l = n - 1;
	while (l && p[l] == l) l--; 
	vector<int> suf = p;
	for (int i = n - 2; i >= 0; i--) 
		suf[i] = min(suf[i], suf[i + 1]);
	while (suf[l] < l) l = suf[l];
	return sum + 2 * l;
}

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