Submission #73428

#	Time	Username	Problem	Language	Result	Execution time	Memory
73428		SmsS	Ancient Books (IOI17_books)	C++14	50 / 100	201 ms	8432 KiB

books

#include<bits/stdc++.h>
using namespace std;
#define for2(a,b,c) for(int a = b; a < c; a++)
#include "books.h"
#define ll long long
long long minimum_walk(std::vector<int> p, int s) {
	if(s != 0) return 0;
	ll res = 0;
	int n = p.size();
	for2(i,0,n) res += abs(i-p[i]);
	int r = 0;
	while(n > 0){
		if(p[n-1] == n-1) n--;
		else break;
	}
	for2(i,0,n-1){
		r  = max(r,p[i]);
		if(i == r) res += 2;
	}
	return res;
}

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