Submission #613936

#	Time	Username	Problem	Language	Result	Execution time	Memory
613936		Mr_Husanboy	Ancient Books (IOI17_books)	C++14	22 / 100	2095 ms	13264 KiB

books

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

using namespace std;
#define all(a) (a).begin(), (a).end()
#define vi vector<int>
#define ff first
#define ss second
#define ll long long


struct Fenwick{
    vector<int> t;
};

long long minimum_walk(vector<int> p, int s) {
    int n = p.size();
    ll tot = 0;
    vector<int> used(n);
    for(int i=0; i<n; i++){
        tot += abs(i - p[i]);
        int mn = min(i, p[i]);
        int mx = max(i, p[i]);
        for(int j = mn; j < mx; j++){
            used[j] = 1;
        }
    }
    int r = n-1;
    while(r >=0 && used[r]==0) r--;
    //cout << r << endl;
 //   cout << "done" << endl;
    ll cnt = 0;
    for(int i = 0; i <=r; i ++){
        cnt += used[i]==0;
    }
    return tot + cnt*2;
}

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