Go: package main

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

var sc = bufio.NewScanner(os.Stdin)

func scanInt() int {
	num, _ := strconv.Atoi(scanString())
	return num
}

func scanString() string {
	sc.Scan()
	return sc.Text()
}

func init() {
	sc.Split(bufio.ScanWords)
}

func main() {
	n := scanInt()
	arr := make([][]int, n)
	for i := 0; i < n; i++ {
		u := scanInt()
		k := scanInt()
		arr[u-1] = make([]int, n)
		for j := 0; j < k; j++ {
			n := scanInt()
			arr[u-1][n-1] = 1
		}
	}

	w := bufio.NewWriter(os.Stdout)
	for _, col := range arr {
		fmt.Fprintln(w, strings.Trim(fmt.Sprint(col), "[]"))
	}
	w.Flush()
}

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;
}