Submission #610278

#	Time	Username	Problem	Language	Result	Execution time	Memory
610278		PiejanVDC	Ancient Books (IOI17_books)	C++17	50 / 100	147 ms	10644 KiB

books

#include "books.h"
#include <bits/stdc++.h>
using namespace std;
 
long long minimum_walk(vector<int>p, int s) {
    int n = p.size();
    long long ans = 0;
    vector<bool>vis(n,0);
    int mx = 0;
    for(int i = 0 ; i < n ; i++) if(!vis[i] && p[i] != i) {
        vis[i] = 1;
        if(i > mx && p[i] != i)
            ans += 2*(i-mx);
        int pos = i;
        do {
            vis[pos] = 1;
            mx = max(mx, pos);
            int nxt = p[pos];
            ans += abs(nxt-pos);
            pos = nxt;
        } while(pos != i);
    }
    return ans;
}

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