Submission #216000

#	Time	Username	Problem	Language	Result	Execution time	Memory
216000		emil_physmath	Ancient Books (IOI17_books)	C++17	0 / 100	5 ms	256 KiB

books

#include "books.h"
#include <vector>
#include <cmath>
using namespace std;

long long minimum_walk(vector<int> a, int s)
{
    int n = a.size();
    long long ans = 0;
    vector<bool> used(n);
    for (int i = 0; i < n; ++i)
    {
        if (!used[i])
        {
            ans = max(ans, 2LL * i);
            int j = i;
            do {
                used[j] = true;
                j = a[j];
            } while(j != i);
        }
    }
    for (int i = 0; i < n; ++i)
        ans += abs(a[i] - i);
    return ans;
}

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