Submission #74314

#	Time	Username	Problem	Language	Result	Execution time	Memory
74314		nvmdava	고대 책들 (IOI17_books)	C++17	0 / 100	2 ms	536 KiB

books

#include "books.h"
#include <bits/stdc++.h>
using namespace std;
int r = -1;
vector<int> p;
bool in[1000001];
inline void go(int v){
	if(in[v] == 1){
		return;
	}
	in[v] = 1;
	r = max(r, v);
	go(p[v]);
}

long long minimum_walk(vector<int> p, int s) {
	::p = p;
	long long ans = 0;
	for(int i = 0; i < p.size(); i++){
		ans += (long long)abs(i - p[i]);
		if(in[i] || p[i] == i) continue;
		if(s < i && s!= -1){
			ans += (i - s) * 2;
			s = -1;
		}
		if(r < i && r != -1){
			ans += (long long)(i - r) * 2;
		}
		go(i);
	}
	if(s > r){
		ans += (s - r) * 2;
	}
	return ans;
}

Compilation message (stderr)

books.cpp: In function 'long long int minimum_walk(std::vector<int>, int)':
books.cpp:19:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < p.size(); i++){
                 ~~^~~~~~~~~~

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