Submission #105444

#	Time	Username	Problem	Language	Result	Execution time	Memory
105444		Alexa2001	Ancient Books (IOI17_books)	C++17	0 / 100	3 ms	1280 KiB

books

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

using namespace std;

typedef long long ll;

const int Nmax = 1e6 + 5;

bool used[Nmax];

int mdl(int x) { return (x > 0 ? x : -x); }

ll minimum_walk(vector<int> p, int s)
{
    int n = p.size();
    int i, last = 0;
    ll ans = 0;

    memset(used, 0, sizeof(used));

    for(i=0; i<n; ++i)
        if(!used[i])
        {
            int x = i;
            do
            {
                ans += mdl(x - p[x]);
                used[x] = 1;
                x = p[x];
            }
            while(x != i);

            if(i != p[i]) last = i;
        }

    ans += 2 * last;
    return ans;
}

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