Submission #612137

#	Time	Username	Problem	Language	Result	Execution time	Memory
612137		Shithila	Ancient Books (IOI17_books)	C++14	0 / 100	1 ms	212 KiB

books

#include "books.h"
#include<bits/stdc++.h>
long long minimum_walk(std::vector<int> p, int s) {
	int len=p.size();
	long long ans=0;
	int max=len-1;
	int pos[len];
	for(int i=0;i<len;i++)
	{
		pos[p[i]]=i;
	}
	while(pos[max]==max)
	{
		max=max-1;
		if(max==0)
		{
			return ans;
		}
	}
	int i=0;
	int carrying=p[0];
	//cout<<"aa"<<endl;
	while(p[i]!=-1)
	{
		if(pos[max]==max)
		{
			max--;
			continue;
		}
		ans=ans+abs(pos[max]-i);
		p[pos[max]]=carrying;
		pos[carrying]=pos[max];
		
		if(i==0)
		{
			p[i]=-1;
		}
		else p[i]=carrying;
		i=pos[max];
		ans=ans+abs(max-i);
		carrying=p[max];
		i=max;
		pos[i]=max;
		max--;
		//cout<<i<<" "<<p[i]<<endl;
	}
	return  ans;
}

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