Submission #428063

#	Time	Username	Problem	Language	Result	Execution time	Memory
428063		inwbear	Ancient Books (IOI17_books)	C++14	50 / 100	157 ms	8132 KiB

books

#include "books.h"
#include <bits/stdc++.h>
using namespace std;
set<pair<int,int> >ss;
long long ans=0;
long long minimum_walk(std::vector<int> p, int s)
{
    int ed=0,rr=0,sw1=s,sw2=s;
    for(int i=0;i<p.size();i++)
    {
        if(p[i]!=i)
        {
            sw1=min(sw1,min(i,p[i]));
            sw2=max(sw2,max(i,p[i]));
        }
    }
    for(int i=0;i<p.size();i++)
    {
        ed=max(ed,p[i]);
        if(sw1==i)rr=0;
        if(sw2==i)ans+=rr*2;
        if(ed==i)
        {
            rr++;
        }
        ans+=abs(i-p[i]);
    }
	return ans;
}

Compilation message (stderr)

books.cpp: In function 'long long int minimum_walk(std::vector<int>, int)':
books.cpp:9:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 |     for(int i=0;i<p.size();i++)
      |                 ~^~~~~~~~~
books.cpp:17:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |     for(int i=0;i<p.size();i++)
      |                 ~^~~~~~~~~

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