Submission #119123

#	Time	Username	Problem	Language	Result	Execution time	Memory
119123		tinjyu	Ancient Books (IOI17_books)	C++14	0 / 100	2 ms	384 KiB

books

#include "books.h"
#include <bits/stdc++.h>
using namespace std;
long long int tag[1000005];
int l[1000005],r[1000005];
long long int ans;
long long minimum_walk(std::vector<int> p, int s) {
	int n=p.size();
	int t=0;
	int far=0;
	for(int i=0;i<n;i++)
	{
		ans+=abs(i-p[i]);
		if(i>p[i])
		{
			tag[p[i]]++;
			tag[i+1]--;
		}
		else
		{
			tag[i]++;
			tag[p[i]+1]--;
		}
	}
	int l=n-1;
	for(int i=n-1;i>=0;i--)
	{
		if(tag[i]<0)break;
		l=i-1;

	}
	int tmp=0;
	for(int i=0;i<=l;i++)
	{
		tmp+=tag[i];
		if(tmp==0)ans+=2;
	}
	return ans;
}

Compilation message (stderr)

books.cpp: In function 'long long int minimum_walk(std::vector<int>, int)':
books.cpp:9:6: warning: unused variable 't' [-Wunused-variable]
  int t=0;
      ^
books.cpp:10:6: warning: unused variable 'far' [-Wunused-variable]
  int far=0;
      ^~~

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