Go: package main

import (
	"bufio"
	"fmt"
	"os"
	"sort"
	"strconv"
)

func getScanner(fp *os.File) *bufio.Scanner {
	scanner := bufio.NewScanner(fp)
	scanner.Split(bufio.ScanWords)
	scanner.Buffer(make([]byte, 1000005), 1000005)
	return scanner
}

func getNextString(scanner *bufio.Scanner) string {
	scanner.Scan()
	return scanner.Text()
}

func getNextInt(scanner *bufio.Scanner) int {
	i, _ := strconv.Atoi(getNextString(scanner))
	return i
}

func getNextInt64(scanner *bufio.Scanner) int64 {
	i, _ := strconv.ParseInt(getNextString(scanner), 10, 64)
	return i
}

func getNextUint64(scanner *bufio.Scanner) uint64 {
	i, _ := strconv.ParseUint(getNextString(scanner), 10, 64)
	return i
}

func getNextFloat64(scanner *bufio.Scanner) float64 {
	i, _ := strconv.ParseFloat(getNextString(scanner), 64)
	return i
}

func main() {
	fp := os.Stdin
	wfp := os.Stdout
	cnt := 0

	if os.Getenv("MASPY") == "ますピ" {
		fp, _ = os.Open(os.Getenv("BEET_THE_HARMONY_OF_PERFECT"))
		cnt = 1
	}
	if os.Getenv("MASPYPY") == "ますピッピ" {
		wfp, _ = os.Create(os.Getenv("NGTKANA_IS_GENIUS10"))
	}

	scanner := getScanner(fp)
	writer := bufio.NewWriter(wfp)
	solve(scanner, writer)
	for i := 0; i < cnt; i++ {
		fmt.Fprintln(writer, "-----------------------------------")
		solve(scanner, writer)
	}
	writer.Flush()
}

func solve(scanner *bufio.Scanner, writer *bufio.Writer) {
	n := getNextInt(scanner)
	g := graph{}
	g.ee = make([]Edges, n)
	g.visited = make([]bool, n)
	g.found = make([]int, n)
	g.leave = make([]int, n)
	for i := 0; i < n; i++ {
		u := getNextInt(scanner) - 1
		k := getNextInt(scanner)
		for j := 0; j < k; j++ {
			v := getNextInt(scanner) - 1
			g.ee[u] = append(g.ee[u], Edge{
				to: v,
				id: u,
			})
		}
	}
	for i := 0; i < n; i++ {
		sort.Sort(g.ee[i])
	}
	for i := 0; i < n; i++ {
		if g.visited[i] {
			continue
		}
		g.dfs(i)
	}

	for i := 0; i < n; i++ {
		fmt.Fprintln(writer, fmt.Sprintf("%d %d %d", i+1, g.found[i], g.leave[i]))
	}
}

// Edge ...
type Edge struct {
	to, id int
}

type Edges []Edge

func (a Edges) Len() int           { return len(a) }
func (a Edges) Swap(i, j int)      { a[i], a[j] = a[j], a[i] }
func (a Edges) Less(i, j int) bool { return a[i].id < a[j].id }

type graph struct {
	ee           []Edges
	t            int
	n            int
	visited      []bool
	found, leave []int
}

func (g *graph) dfs(i int) {
	g.visited[i] = true
	g.t++
	g.found[i] = g.t
	for _, e := range g.ee[i] {
		if g.visited[e.to] {
			continue
		}
		g.dfs(e.to)
	}
	g.t++
	g.leave[i] = g.t
}

C++: #include <iostream>
#include <cstdio>
#include <vector>
#define N 100
typedef struct SearchTime SearchTime;

struct SearchTime{
    int find = -1;
    int comp = -1;
    bool flag = false;
    void print(){
        std::cout << find << " " << comp << '\n';
    }
};

int cnt = 1;
int A[N][N];
SearchTime st[N];

void input_graph(std::vector<std::vector<int> >& Adj, int n){
    int u, k, v;
    for(int i=0; i<n; i++){
        std::cin >> u >> k;
        for(int j=0; j<k; j++){
            std::cin >> v;
            Adj[u-1].push_back(v);
        }
    }
}

void input_A(std::vector<std::vector<int> >& Adj, int n){
    for(int i=0; i<n; i++){
        for(int j=0; j<n; j++){
            A[i][j] = 0;
        }
    }
    for(int i=0; i<n; i++){
        int len = Adj[i].size();
        for(int j=0; j<len; j++){
            A[i][Adj[i][j]-1] = 1;
            A[Adj[i][j]-1][i] = -1;
        }
    }
}

void output_A(int n){
    for(int i=0; i<n; i++){
        for(int j=0; j<n; j++){
            if(j+1==n)  printf("%3d\n", A[i][j]);
            else        printf("%3d", A[i][j]);
        }
    }
}

void result(int n){
    for(int i=0; i<n; i++){
        std::cout << i+1 << " ";
        st[i].print();
    }
}

void DFS(std::vector<std::vector<int> >& Adj, int n){
    int i = 0;
    int j;
    int nexti;              //毎回-1する.
    std::vector<int> tmp;   //軌跡を保存
    //深さ優先探索
    while(cnt <= n*2){
        //下層へ探索
        //std::cout << "\nstrat\n";
        while(i != -1){
            st[i].flag = true;
            st[i].find = cnt;
            cnt++;
            //std::cout << "cnt:" << cnt-1 << '\n';
            tmp.push_back(i);
            //std::cout << "tmp.size():" << tmp.size() << '\n';
            //std::cout << "i:" << i+1 << '\n';
            //次の葉を探す
            if((int)Adj[i].size() != 0){//葉が最深でないとき
                j = 0;
                nexti = Adj[i][j]-1;
                while(st[nexti].flag){
                    j++;
                    if(j == (int)Adj[i].size()){//もし葉がすべて探索済みなら
                        st[i].comp = cnt;
                        cnt++;
                        //std::cout << "tochu\n";
                        //std::cout << "cnt:" << cnt-1 << '\n';
                        i = -1; //2つ目のwhile文抜ける
                        break;
                    }
                    nexti = Adj[i][j]-1;
                }
                if(i != -1) i = nexti;
            }
            else{//葉が最深のとき
                st[i].comp = cnt;
                cnt++;
                i = -1; //2つ目のwhile文抜ける
                //std::cout << "saishin\n";
                //std::cout << "cnt:" << cnt-1 << '\n';
                //std::cout << "tmp.size():" << tmp.size() << '\n';
                //std::cout << "i:" << i << '\n';
            }
        }
        //ここから根に向かって戻る. 未探索の葉があればそちらへ行く
        //std::cout << "\nback\n";
        tmp.pop_back();
        i = (int)tmp.back();
        tmp.pop_back();
        //std::cout << "tmp.size():" << tmp.size() << '\n';
        //std::cout << "i:" << i+1 << '\n';
        j = 0;
        nexti = Adj[i][j]-1;
        while(st[nexti].flag){
            j++;
            if(j == (int)Adj[i].size()){//現在のノードから未探索の葉がない
                if((int)tmp.size() != 0){//まだtmpに軌跡が残っていれば
                    st[i].comp = cnt;
                    cnt++;
                    //std::cout << "cnt:" << cnt-1 << '\n';
                    i = (int)tmp.back();
                    tmp.pop_back();
                    //std::cout << "tmp.size():" << tmp.size() << '\n';
                    //std::cout << "i:" << i+1 << '\n';
                    j = 0;
                    nexti = Adj[i][j]-1;
                }
                else{//残っていないなら
                    st[i].comp = cnt;
                    cnt++;      //たぶんこれで終わる
                    //std::cout << "cnt:" << cnt-1 << '\n';
                    break;
                }
            }
            else{
                nexti = Adj[i][j]-1;
            }
        }
        tmp.push_back(i);
        i = nexti;
    }
}


int main(){
    int n;
    std::cin >> n;
    std::vector<std::vector<int> > Adj;
    Adj.resize(n);
    input_graph(Adj, n);
    //input_A(Adj, n);
    //output_A(n);
    DFS(Adj, n);
    result(n);
    return 0;
}