[CSES] Planets Queries II

vector<ll> v[N], revv[N], topo;
bool vis1[N], vis2[N];
void dfs1(ll node) {
    vis1[node] = 1;
    for (auto child : v[node]) {
        if (!vis1[child]) {
            dfs1(child);
        }
    }
    topo.pb(node);
}
void dfs2(ll node) {
    vis2[node] = 1;
    for (auto child : revv[node]) {
        if (!vis2[child]) {
            dfs2(child);
        }
    }
}
void solve() {

}