Submission #583416

#	Time	Username	Problem	Language	Result	Execution time	Memory
583416		InternetPerson10	Ancient Books (IOI17_books)	C++17	50 / 100	116 ms	15072 KiB

books

#include "books.h"
#include <bits/stdc++.h>
typedef long long ll;

using namespace std;

long long minimum_walk(vector<int> p, int s) {
    ll ans = 0;
    int n = p.size();
    int best = 0;
    vector<bool> taken(n, false);
    for(int i = 0; i < n; i++) {
        if(p[i] == i) continue;
        if(best < i) {
            ans += 2 * (i - best);
        }
        if(!taken[i]) {
            int x = i;
            while(!taken[x]) {
                best = max(x, best);
                taken[x] = true;
                ans += abs(x - p[x]);
                x = p[x];
            }
        }
    }
	return ans;
}

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