Cod sursa(job #672595)

Utilizator socheoSorodoc Ionut socheo Data 2 februarie 2012 19:43:39
Problema Cerere Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 1.14 kb
#include<cstdio>
#include<vector>
#define MAXN 100005
using namespace std;

vector<int> TR[MAXN];
int st[MAXN], k[MAXN], n, tata[MAXN], next[MAXN], viz[MAXN], d[MAXN];
int main()
{
    freopen("cerere.in", "r", stdin);
    freopen("cerere.out", "w", stdout);

    scanf("%d", &n);
    for(int i = 1; i <= n; i++)
        scanf("%d", &k[i]);
    int a,b;
    for(int i = 1; i < n; i++)
    {
        scanf("%d%d", &a, &b);
        TR[a].push_back(b);
        tata[b] = a;
    }
    int rad = 1;
    while(tata[rad] != 0)
        rad = tata[rad];
    int top = 1;
    st[top] = rad;
    while(top > 0)
    {
        int nod = st[top];
        if(k[nod] > 0)
            d[nod] = d[st[top - k[nod]]] + 1;
        if(viz[nod] == 0 && TR[nod].size() != 0)
        {
            top++;
            st[top] = TR[nod][0];
            next[top] = 1;
            viz[st[top - 1]] = 1;
        }
        else
            if(next[top] < TR[st[top - 1]].size())
            {
                st[top] = TR[st[top - 1]][next[top]];
                next[top]++;
            }
            else top--;
    }

    for(int i = 1; i <= n; i++)
        printf("%d ", d[i]);
    return 0;
}