Cod sursa(job #3160655)

Utilizator stefandutastefandutahoria stefanduta Data 24 octombrie 2023 19:38:21
Problema Cerere Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 2.3 kb
#include <fstream>
#include <vector>
#include <algorithm>
#define NMAX 100005
#define LOG_MAX 17

using namespace std;

ifstream in("cerere.in");
ofstream out("cerere.out");

int v[NMAX], f[NMAX][LOG_MAX + 1], k[NMAX], stramos[NMAX], pow[LOG_MAX + 5], lvl[NMAX], p[NMAX], drum[NMAX];
vector <int> adj[NMAX];

void dfs(int node)
{
    for (int i = 0; i < adj[node].size(); ++i)
    {
        lvl[adj[node][i]] = lvl[node] + 1;
        dfs(adj[node][i]);
    }
}

bool cmp(int a, int b)
{
    if (lvl[a] < lvl[b])
        return true;
    return false;
}

int main()
{
    int n, i, j, a, b, l;
    in >> n;
    for (i = 1; i <= n; ++i)
        in >> k[i];
    for (i = 1; i <= n - 1; ++i)
    {
        in >> a >> b;
        f[b][0] = a;
        adj[a].push_back(b);
    }

    pow[0] = 1;
    for (i = 1; i <= LOG_MAX; ++i)
        pow[i] = pow[i - 1] * 2;


    for (l = 1; l <= LOG_MAX; ++l)
    {
        for (i = 1; i <= n; ++i)
        {
            f[i][l] = f[f[i][l - 1]][l - 1];
        }
    }

    for (i = 1; i <= n; ++i)
    {
        int copiek = k[i];
        stramos[i] = i;
        for (l = LOG_MAX; l >= 0; --l)
        {
            if (copiek >= pow[l])
            {
                //out << i << " " << l << " " << copiek << " " << stramos[i] << " " << f[stramos[i]][l] << '\n';
                copiek = copiek - pow[l];
                stramos[i] = f[stramos[i]][l];
            }
        }
    }

    /*for (i = 1; i <= n; ++i)
        out << stramos[i] << " ";*/

    int rad;
    for (i = 1; i <= n; ++i)
    {
        if (f[i][0] == 0)
            rad = i;

        p[i] = i;
    }

    dfs(rad);
    lvl[rad] = 0;
    sort (p + 1, p + n + 1, cmp);

    //for (i = 1; i <= n; ++i)
        //out << p[i] << " " << lvl[p[i]] << '\n';

    for (i = 1; i <= n; ++i)
    {
        if (p[i] == stramos[p[i]])
        {
            drum[p[i]] = 0;
            //out << p[i] << " " << drum[p[i]] << '\n';
        }
        else
        {
            drum[p[i]] = drum[stramos[p[i]]] + 1;
            //out << p[i] << " " << drum[p[i]] << " <- " << stramos[p[i]] << " " << drum[stramos[p[i]]] << '\n';
        }
        //out << drum[i] << " ";
    }

    for (i = 1; i <= n; ++i)
        out << drum[i] << " ";
    return 0;
}