Go: package main

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

var sc = bufio.NewScanner(os.Stdin)

func nextInt() int {
	sc.Scan()
	i, _ := strconv.Atoi(sc.Text())
	return i
}
func main() {
	sc.Split(bufio.ScanWords)

	n := nextInt()

	graph := make([][]int, n)
	for i := 0; i < n; i++ {
		graph[i] = make([]int, n)
	}
	for i := 0; i < n; i++ {
		s := nextInt()
		t := nextInt()
		if t == 0 {
			continue
		}
		for i := 0; i < t; i++ {
			u := nextInt()
			graph[s-1][u-1] = 1
		}
	}
	for i := range graph {
		for j := range graph[i] {
			if j == n-1 {
				fmt.Printf("%d\n", graph[i][j])
			} else {
				fmt.Printf("%d ", graph[i][j])
			}
		}
	}
}

C++: #include<iostream>
using namespace std;
typedef struct{
  int A[1000];
}node;
node T[105];
int main(){
  int n;
  int num;
  int son;
  int z;
  cin>>n;
  for(int i=0;i<n;i++){
    cin>>num;
    cin>>son;
    for(int j=0;j<son;j++){
      cin>>z;
      T[num].A[z]=1;
      }
  }
  for(int i=1;i<=n;i++){
    for(int j=1;j<=n;j++){
      if(j==1)cout<<T[i].A[j];
      else cout<<" "<<T[i].A[j];
    }
    cout<<endl;
  }
  return 0;
}

C++: #include<iostream>
using namespace std;

int main(void){
  int m, a[100][100];
  int b[100][100];

  cin >> m;
  cout << m << "\n";

  for(int i=0; i<m; i++){
    cin >> a[i][0];
    cin >> a[i][1];

    for(int j=2; j<a[i][1]+2; j++){
      cin >> a[i][j];
      b[i][ a[i][j]-1 ] = 1;
    }
  }

  for(int i=0; i<m; i++){
    for(int j=0; j<m; j++){
      cout << b[i][j] << " ";
    }
    cout << "\n";
  }
  return 0;
}

C++: #include <iostream>
using namespace std;

int n;
int M[101][101];
int main() {
    cin >> n;

    for (int i = 0; i < n; ++i) {
        int v, k;
        cin >> v >> k;
        for (int j = 0; j < k; ++j) {
            int s;
            cin >> s;
            M[v][s] = 1;
        }
    }

    for (int l = 1; l <= n; ++l) {
        for (int i = 1; i <= n; ++i) {
            cout << M[l][i] << " " ;
        }
        if(l != n)
        cout << endl;
    }

    return 0;
}