Go: package main

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

func main() {
	scanner := bufio.NewScanner(os.Stdin)
	scanner.Split(bufio.ScanWords)
	scanner.Scan()
	n, _ := strconv.Atoi(scanner.Text())
	Adj := make([][]int, n)
	for i := range Adj {
		Adj[i] = make([]int, n)
	}
	for i := 0; i < n; i++ {
		scanner.Scan()
		u, _ := strconv.Atoi(scanner.Text())
		scanner.Scan()
		k, _ := strconv.Atoi(scanner.Text())
		if k == 0 {
			continue
		}
		for i := 0; i < k; i++ {
			scanner.Scan()
			v, _ := strconv.Atoi(scanner.Text())
			Adj[u-1][v-1] = 1
		}
	}
	for i := range Adj {
		for j := range Adj[i] {
			fmt.Printf(" %d", Adj[i][j])
			if j == n-1 {
				fmt.Println()
			}
		}
	}
}

C++: #include <iostream>
#include <set>
#include <vector>
#include <utility>

using namespace std;

typedef long long signed int ll;

constexpr ll NIL = -20000000000;

int g[101][101],n;

int main() {
    cin >> n;
    for(int i = 0;i < n;i++) {
        int u,k,v;
        cin >> u >> k;
        for(int j = 0;j < k;j++) {
            cin >> v;
            g[u][v]++;
        }
    }
    for(int i = 1;i <= n;i++){for(int j = 1;j <n;j++)cout<<g[i][j] << " "; cout<<g[i][n] << endl;}
}

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

int main()
{
	int i,j,n,u,k;
	int v[100][100];
	cin >> n;
	for(i=0;i<n;i++){
		cin >> u;
		for(j=0;j<u;j++){
			cin >> k;
			cin >>v[i][k];
		}
	}
	for(i=0;i<n;i++){
		for(j=0;j<n;j++){
			cout << v[i][j] << " ";
		}
		cout<<endl;
	}
}

C++: #include "bits/stdc++.h"

using namespace std;

using ll = long long;
using ld = long double;
using P = pair<string, int>;
constexpr ld EPS = 1e-12;
constexpr int INF = numeric_limits<int>::max() / 2;
constexpr int MOD = 1e9 + 7;

template <typename T>
void printv(const vector<T> &v)
{
    int sz = v.size();
    for (int i = 0; i < sz; i++)
    {
        cout << v[i] << " \n"[i == sz - 1];
    }
}

int main()
{
    cin.tie(0);
    ios::sync_with_stdio(false);

    int n;
    cin >> n;
    vector<vector<int>> res(n, vector<int>(n, 0));
    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--;
            res[u][v] = 1;
        }
        printv(res[u]);
    }
}

C++: #include <bits/stdc++.h>

#define FOR(i, a, b) for(long long int i=(a);i<=(b);i++)
#define RFOR(i, a, b) for(long long int i=(a);i>=(b);i--)
#define MOD 1000000007
#define INF 1000000000 //2000000000
#define LLINF 1000000000000000000 //9000000000000000000
#define PI 3.14159265358979

using namespace std;
typedef long long int ll;
typedef pair< long long int, long long  int> P;



int main(void) {
	int n;
	int u, k, v;
	int gra[101][101] = {};

	cin >> n;
	
	FOR(i, 1, n) {
		cin >> u >> k;
		FOR(t, 1, k) {
			cin >> v;
			gra[u][v] = 1;
		}
	}
	FOR(i, 1, n) {
		FOR(t, 1, n) {
			cout << gra[i][t] << " ";
		}
		cout << endl;
	}
	return 0;
}

C++: import java.util.LinkedList;
import java.util.List;
import java.util.Scanner;

public class Main{
    //directed graph
    List<Integer> adg[];
    GraphAizu(int n){
        adg = new LinkedList[n+1];
        for(int i = 0; i<=n; i++){
            adg[i] = new LinkedList<>();
        }
    }
    void addEdge(int index, int vertex){
        adg[index].add(vertex);
    }

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        Main graph = new Main(n);
        for(int i = 0; i<n; i++){
            int index = in.nextInt();
            int m = in.nextInt();
            for(int j = 0; j<m; j++){
                int temp = in.nextInt();
                graph.addEdge(index,temp);
            }
        }
        //change to matrix
        int[][] matrix = new int[n+1][n+1];
        for(int i = 1; i<=n; i++){
            if(graph.adg[i].size()!=0) {
                for (int c : graph.adg[i]) {
                    matrix[i][c] = 1;
                }
            }
        }
        for(int i = 1; i<=n; i++){
            for(int j = 1; j<=n; j++){
                if(j!=n) System.out.print(matrix[i][j]+ " ");
                else System.out.print(matrix[i][j]);
            }
            System.out.println();
        }

    }
}

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

int main(){
    int n;
    cin >> n;
    int mat[n][n] = {};

    for(int i = 0; i < n; i++){
        int x, k, y;
        cin >> x >> k;
        while(k-- > 0){
            cin >> y;
            mat[x-1][y-1] = 1;
        }
    }

    for(int i = 0; i < n; i++){
        for(int j = 0; j < n; j++){
            if(j) cout << " ";
            cout << mat[i][j];
        }
        cout << endl;
    }

    return 0;
}

C++: #include <iostream>
#include <queue>
#include <vector>

using namespace std;

int main() {
	int n;
	cin >> n;
	vector<vector<int> > G(n, vector<int>(n, 0));
	for (int i = 0; i < n; i++) {
		int u, k;
		cin >> u >> k;
		for (int j = 0; j < k; j++) {
			int v_j;
			cin >> v_j;
			G[u - 1][v_j - 1] = 1;
		}
	}
	for (int i = 0; i < n; i++) {
		for (int j = 0; j < n; j++) {
			cout << G[i][j] << (j == n - 1 ? "\n" : " ");
		}
	}
}

C++: #include <iostream>
#include <cstdio>
#include <cstdlib>
#include <cassert>
#include <string>
#include <cstring>
#include <vector>
#include <list>
#include <map>
#include <set>
#include <stack>
#include <queue>
#include <algorithm>

using namespace std;

// ---------------------
// repetition
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n) FOR(i,0,n)

// debug
#define dump(x)  cerr << #x << " = " << (x) << endl;
#define debug(x) cerr << #x << " = " << (x) << " (L" << __LINE__ << ")" << " " << __FILE__ << endl;

// ---------------------
#define INF 922337203685477580
typedef long long ll;

int matrix[110][110];

int main() {
  REP(x, 110) {
    REP(y, 110) {
      matrix[x][y] = 0;
    }
  }


  int n;
  cin >> n;

  REP(_, n) {
    int v, num;
    cin >> v >> num;

    REP(i, num) {
      int cv;
      cin >> cv;
      matrix[v][cv] = 1;
    }
  }


  FOR(x, 1, n + 1) {
    FOR(y, 1, n + 1) {
      if (y > 1) cout << " ";
      cout << matrix[x][y];
    }
    cout << endl;
  }

  return 0;
}

C++: #include <iostream>
#include <vector>
//#include "../cxx-prettyprint/prettyprint.hpp"

int main() {
    int n;
    std::cin >> n;

    std::vector<std::vector<int>> Adj;
    Adj.assign(n + 1, std::vector<int>(n + 1, 0));

    for (int i = 0; i < n; i ++) {
        int u, k;
        std::cin >> u >> k;
        for (int j = 0; j < k; j ++) {
            int a;
            std::cin >> a;
            Adj[u][a] = 1;
        }
    }

    for (int i = 1; i <= n; i ++) {
        for (int j = 1; j <= n; j ++) {
            if (j > 1) std::cout << " ";
            std::cout << Adj[i][j];
        }
        std::cout << std::endl;
    }
}

C++: #include <bits/stdc++.h>
#define ll long long
using namespace std;

int main() {
    ll n;
    cin >> n;
    vector<vector<ll>> mat(n,vector<ll>(n,0));
    for(ll i=0;i<n;i++) {
        ll u,k;
        cin>>u>>k;
        for(ll j=0;j<k;j++) {
            ll tmp;
            cin>>tmp;
            mat[u-1][tmp-1] = 1;
        }
    }
    for(ll i=0;i<n;i++) {
        for(ll j=0;j<n;j++) {
            cout << mat[i][j] << " ";
        }
        cout << endl;
    }
}

C++: #include <iostream>

using namespace std;

int main()
{
    int n, u, k, v;
    cin >> n;

    int adj_matrix[n][n];
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            adj_matrix[i][j] = 0;
        }
    }
    
    for (int i = 0; i < n; i++) {
        cin >> u;
        cin >> k;
        for (int j = 0; j < k; j++) {
            cin >> v;
            adj_matrix[u-1][v-1] = 1;
        }
    }

    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n - 1; j++) {
            cout << adj_matrix[i][j] << " ";
        }
        cout << adj_matrix[i][n-1] << endl;
    }

    return 0;
}