#include <bits/stdc++.h>
using namespace std;

vector<vector<int>> g;
vector<int> d;
vector<int> f;
int t;

void dfs( int v )
{
	d[v] = ++t;
	for( int u : g[v] ) {
		if( d[u] ) continue;
		dfs( u );
	}
	f[v] = ++t;
}

int main()
{
	int n;
	cin >> n;
	g = vector<vector<int>>( n );
	d = vector<int>( n );
	f = vector<int>( n );
	for( int i = 0; i < n; i++ ) {
		int u, k;
		cin >> u >> k;
		u--;
		for( int j = 0; j < k; j++ ) {
			int v;
			cin >> v;
			v--;
			g[u].push_back( v );
		}
	}

	for( int i = 0; i < n; i++ ) {
		if( d[i] ) continue;
		dfs( i );
	}

	for( int i = 0; i < n; i++ ) {
		cout << i + 1 << " " << d[i] << " " << f[i] <<  endl;
	}
}

