Submission #1061399

#	Time	Username	Problem	Language	Result	Execution time	Memory
1061399		Zicrus	Ancient Books (IOI17_books)	C++17	0 / 100	0 ms	348 KiB

books

#include <bits/stdc++.h>
#include "books.h"
using namespace std;

typedef long long ll;

ll minimum_walk(vector<int> p, int s) {
    ll n = p.size();
	ll res = 0;
    ll ooo = 0;
    for (int i = 0; i < n; i++) ooo += (p[i] != i);

    vector<bool> vst(n);
    for (int i = 0; i < n && ooo > 0; i++) {
        if (vst[i]) { res += 2; continue; }
        ll cur = i;
        do {
            if (p[cur] != cur) ooo--;
            res += abs(cur - p[cur]);
            cur = p[cur];
            vst[cur] = true;
        } while (cur != i);
        if (ooo > 0) res += 2;
    }

    return res;
}

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