Submission #70236

#	Time	Username	Problem	Language	Result	Execution time	Memory
70236		E869120	Ancient Books (IOI17_books)	C++14	12 / 100	4 ms	768 KiB

books

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

int n;bool used[1000009];

long long minimum_walk(vector<int> p, int s) {
	n=p.size();
	long long sum=0,L=(1LL<<60);
	for(int i=0;i<n;i++){
		if(used[i]==true || i==p[i]) continue;
		int cx=i;L=min(L,1LL*i);
		while(true){
			sum+=abs(cx-p[cx]);used[cx]=true;
			cx=p[cx];if(cx==i) break;
		}
	}
	if(L==(1LL<<60)) L=0;
	return sum+L*2;
}

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