Submission #62626

#	Time	Username	Problem	Language	Result	Execution time	Memory
62626		Tenuun	Ancient Books (IOI17_books)	C++17	0 / 100	4 ms	792 KiB

books

#include<bits/stdc++.h>

using namespace std;

bool vis[1000001]={false};
long long res=0, k;
vector<int>v;

void dfs(int u){
	vis[u]=true;
	res+=abs(v[u]-u);
	if(v[u]==k) return;
	dfs(v[u]);
}

long long minimum_walk(std::vector<int> p, int s) {
	int last=0;
	v=p;
	for(int i=0; i<p.size(); i++){
		if(i==p[i]) vis[i]=true;
	}
	for(int i=0; i<p.size(); i++){
		if(vis[i]) continue;
		res+=i-last;
		k=i;
		dfs(i);
		last=i;
	}
	return res+last;
}

Compilation message (stderr)

books.cpp: In function 'long long int minimum_walk(std::vector<int>, int)':
books.cpp:19:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0; i<p.size(); i++){
               ~^~~~~~~~~
books.cpp:22:16: 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