Cod sursa(job #1655722)

Utilizator bogdanboboc97Bogdan Boboc bogdanboboc97 Data 18 martie 2016 11:32:35
Problema Cerere Scor 25
Compilator cpp Status done
Runda Arhiva de probleme Marime 1.48 kb
#include <iostream>
#include <vector>
#include <algorithm>
#include <limits>
#include <numeric>
#include <cstring>
#include <string>
#include <queue>
#include <set>
#include <cmath>
#include <fstream>
#include <cstdlib>
#include <map>
#define pb push_back
#define mp make_pair
#define INF numeric_limits<int>::max()
#define bit(x) (-x)&x
#define int64 long long
using namespace std;
ifstream in("cerere.in");
ofstream out("cerere.out");
vector< vector<int> > a;
vector<int> k,sol,t;
vector<bool> use;
queue<int> q;
int n;
void dfs(int x,int dist,int root)
{
    if(dist==k[x] && sol[x] > sol[root]+1)
    {
        sol[x]=sol[root]+1;
        if(use[x]==false)
        {
            use[x]=true;
            q.push(x);
        }
    }
    if(sol[x]==0 && use[x]==false)
    {
        use[x]=true;
        q.push(x);
    }
    for(vector<int>::iterator i=a[x].begin();i!=a[x].end();i++)
        dfs(*i,dist+1,root);
}
int main()
{
    in>>n;
    a=vector< vector<int> > (n+1);
    k=sol=t=vector<int> (n+1);
    use=vector<bool> (n+1);
    for(int i=1;i<=n;i++)
    {
        in>>k[i];
        sol[i]=( k[i]==0 ? 0 : INF );
    }
    for(int i=2;i<=n;i++)
    {
        int x,y;
        in>>x>>y;
        t[y]=x;
        a[x].pb(y);
    }
    for(int i=1;i<=n;i++)
    if(t[i]==0)
    {
        q.push(i);
        use[i]=true;
        break;
    }
    while(!q.empty())
    {
        int x=q.front();
        q.pop();
        dfs(x,0,x);
    }
    for(int i=1;i<=n;i++)
        out<<sol[i]<<' ';
    return 0;
}