Submission #1054121

#	Time	Username	Problem	Language	Result	Execution time	Memory
1054121		Unforgettablepl	Ancient Books (IOI17_books)	C++17	50 / 100	77 ms	18896 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();
	vector mover(n,0);
	int last_voilater = 0;
	long long ans = 0;
	for(int i=0;i<n;i++) {
		if(p[i]==i)continue;
		ans+=abs(p[i]-i);
		last_voilater=i;
		mover[min(p[i],i)]++;
		mover[max(p[i],i)]--;
	}
	for(int i=1;i<n;i++)mover[i]+=mover[i-1];
	for(int i=0;i<last_voilater;i++) {
		if(mover[i]==0)ans+=2;
	}
	return ans;
}

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