Cod sursa(job #2764605)

Utilizator DragosC1Dragos DragosC1 Data 21 iulie 2021 20:20:42
Problema Cerere Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 1.04 kb
#include <fstream>
#include <vector>
using namespace std;

int n;
int up[100001];
bool fr[100001];
int radacina;
int rez[100001];

vector<int> a[100001];

void read() {
    int i, x, y;
    ifstream f("cerere.in");
    f >> n;
    for (i = 1; i <= n; i++)
        f >> up[i];
    for (i = 1; i < n; i++) {
        f >> x >> y;
        fr[y] = 1;
        a[x].push_back(y);
        a[y].push_back(x);
    }
    f.close();
}

int st[100001], l;

void dfs(int x, int px) {
    rez[x] = 1 + rez[st[l - up[x]]];
    for (int y : a[x]) {
        if (y == px) continue;
        st[++l] = y;
        dfs(y, x);
        l--;
    }
}

void solve() {
    for (int i = 1; i <= n; i++)
        if (fr[i] == 0) {
            radacina = i;
            break;
        }
    st[++l] = radacina;
    dfs(radacina, 0);
}

void output() {
    int i;
    ofstream g("cerere.out");
    for (i = 1; i <= n; i++)
        g << rez[i] - 1 << ' ';
    g.close();
}

int main() {
    read();
    solve();
    output();
    return 0;
}