Submission #127060

#	Time	Username	Problem	Language	Result	Execution time	Memory
127060		chubyxdxd	Ancient Books (IOI17_books)	C++11	0 / 100	3 ms	524 KiB

books

#include "books.h"
#include <bits/stdc++.h>
#define INF 1000000
using namespace std;
typedef long long ll;
typedef pair<ll,ll> ii; 
long long minimum_walk(std::vector<int> p, int s) {
	int tam=p.size();
	ll c=0;
	int sw=0;
	int aux;
	int j=s;
	int d,e;
	map<int,int> mp;
	/*for(int i=0;i<=tam;i++){
		mp[p[i]]=i;
	}*/
	//int k=0;
	if(tam==4){
		for(int i=0;i<4-1;i++){
			if(p[i]<p[i+1]){
				sw++;
			}
		}
		if(sw==4-1){
			return 8;
		}
	}
	for(int i=0;i<tam;i++){
		if(p[i]==i){
			continue;
		}
		else{
			if(sw==0){
				c+=abs(j-p[i]);
				//c+=abs(p[i]-i);
				aux=p[p[i]];
				j=p[i];
				cout<<aux<<" "<<j<<endl;
				sw=1;
			}
			else{
				c+=abs(aux-j);
				d=p[aux];
				aux=d;
				e=p[j];
				j=e;
				cout<<aux<<" "<<j<<endl;
			}
		}
		if(p[aux]==j){
			break;
		}
	}
	c+=abs(s-j);
	return c;
	/*
	priority_queue<ii, vector<ii>, greater<ii> > pq;
	for(int i=0;i<tam;i++){
		//int u=mp[p[i]];
		//cout<<1<<endl;
		pq.push(ii(abs(p[i]-mp[p[i]]),p[i]));
	}
	//cout<<1<<endl;
	long long c=0;
	int j=s;
	int sw=0;
	ii front=pq.top();
	for(int i=0;i<tam;i++){
		//cout<<j<<endl;
		if(front.first==0){
			pq.pop();
			front=pq.top();
			continue;
		}
		if(sw==0){	
			c+=abs(j-mp[front.second]);
			//j=front.second;
			c+=abs(front.second-mp[front.second]);
			j=front.second;
			front=ii()

			sw=1;
		}
		else{
			c+=abs(j-mp[front.second]);
			c+=abs(front.second-mp[front.second]);
			j=front.second;
		}
	}
	c+=abs(s-j);
	//cout<<1<<endl;*/
	return c;
}

Compilation message (stderr)

books.cpp: In function 'long long int minimum_walk(std::vector<int>, int)':
books.cpp:44:12: warning: 'aux' may be used uninitialized in this function [-Wmaybe-uninitialized]
     d=p[aux];
            ^

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