Cod sursa(job #927008)

Utilizator raulstoinStoin Raul raulstoin Data 25 martie 2013 15:28:09
Problema Cerere Scor 30
Compilator cpp Status done
Runda Arhiva de probleme Marime 1.17 kb
#include<fstream>
#include<vector>
#include<algorithm>
#define NMAX 100005
using namespace std;
int n,v[NMAX],str[20][NMAX],A[NMAX];
vector<int> G[NMAX],topo;
void read()
{
	ifstream fin("cerere.in");
	fin>>n;
	int i,x,y;
	for(i=1;i<=n;i++)
		fin>>v[i];
	for(i=1;i<n;i++)
	{
		fin>>x>>y;
		str[0][y]=x;
		G[x].push_back(y);
	}
	fin.close();
}
void DFS(int nod)
{
	topo.push_back(nod);
	for(size_t i=0;i<G[nod].size();i++)
		DFS(G[nod][i]);
}
inline void stramosi()
{
	for(size_t i=0;i<topo.size();i++)
		for(int j=1;(1<<j)<=n;j++)
			str[j][topo[i]]=str[j-1][str[j-1][topo[i]]];
}
inline int query(int x,int y)
{
	if(!y)
		return x;
	int i;
	for(i=0;(1<<i)<=y;i++);
	i--;
	y-=(1<<i);
	x=str[i][x];
	return query(x,y);
}
int TATA()
{
	for(int i=1;i<=n;i++)
		if(!str[0][i])
			return i;
	return 0;
}
void solve()
{
	DFS(TATA());
	stramosi();
	for(size_t i=0,x;i<topo.size();i++)
		if(v[topo[i]])
		{
			x=query(topo[i],v[topo[i]]);
			A[topo[i]]=A[x]+1;
		}
}
void print()
{
	ofstream fout("cerere.out");
	for(int i=1;i<=n;i++)
		fout<<A[i]<<' ';
	fout.close();
}
int main()
{
	read();
	solve();
	print();
	return 0;
}