Go: package main

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

func getScanner(fp *os.File) *bufio.Scanner {
	scanner := bufio.NewScanner(fp)
	scanner.Split(bufio.ScanWords)
	scanner.Buffer(make([]byte, 500001), 500000)
	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 main() {
	fp := os.Stdin
	if len(os.Args) > 1 {
		fp, _ = os.Open(os.Args[1])
	}

	scanner := getScanner(fp)
	writer := bufio.NewWriter(os.Stdout)

	n := getNextInt(scanner)
	g := make([][]int, n)

	for i := 0; i < n; i++ {
		g[i] = make([]int, n)
	}

	for i := 0; i < n; i++ {
		u := getNextInt(scanner)
		k := getNextInt(scanner)
		u--
		for ii := 0; ii < k; ii++ {
			v := getNextInt(scanner)
			v--
			g[u][v] = 1
		}
		fmt.Fprintln(writer, joinint(g[u], " "))
	}

	writer.Flush()
}

func joinint(a []int, sep string) string {
	n := len(a)
	ss := make([]string, n)
	for i := 0; i < n; i++ {
		ss[i] = fmt.Sprintf("%d", a[i])
	}
	return strings.Join(ss, sep)
}

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

//---------------------------------------------------------------
// ------ graph ------ //
using Weight = int;
using Flow = int;
struct Edge {
    int src, dst;
    Weight weight;
    Flow cap;
    Edge() : src(0), dst(0), weight(0) { }
    Edge(int s, int d, Weight w) : src(s), dst(d), weight(w) { }
};
bool operator < (const Edge &e, const Edge &f) {
    return e.weight != f.weight ? e.weight > f.weight : // pqが降順のため
        e.src != f.src ? e.src < f.src : e.dst < f.dst;
}
using Edges = vector<Edge>;
using Graph = vector<Edges>;
using Array = vector<Weight>;
using Matrix = vector<Array>;
void add_edge1(Graph &g, int a, int b, Weight w = 1) {
    g[a].emplace_back(a, b, w);
}
void add_edge2(Graph &g, int a, int b, Weight w = 1) {
    g[a].emplace_back(a, b, w);
    g[b].emplace_back(b, a, w);
}
void add_arc(Graph &g, int a, int b, Weight w = 1) {
    g[a].emplace_back(a, b, w);
}
//---------------------------------------------------------------

int main() {
    int n; cin >> n;
    Matrix M(n, Array(n, 0));
    for (int i = 0; i < n; i++) {
        int u, k; cin >> u >> k;
        while (k--) {
            int v; cin >> v; M[u - 1][v - 1]++;
        }
    }
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            cout << M[i][j] << " \n"[j == n - 1];
        }
    }
    return 0;
}

C++: /* 
 * ALDS1_11.cpp
 * ??£??\???????????¨?????§???????????????????????°??????G?????£??\????????¨?????????????????????????????????
 */
#include <iostream>
#include <vector>
#include <cstdio>
#include <cstdlib>
#include <cstring>

using namespace std;

using Adjacents = vector<int>;
using Vertexes = vector<Adjacents>;

int main(void) {

    int N;
    scanf("%d", &N);

    Vertexes vs;
    vs.resize(N);
    for (int i = 0, id, num; i < N; ++i) {
        scanf("%d %d", &id, &num);
        for (int j = 0, vert; j < num; ++j) {
            scanf("%d", &vert);
            vs[id-1].push_back(vert);
        }
    }

    int **matrix = new int*[N];
    for (int i = 0; i < N; ++i) {
        matrix[i] = new int[N];
        memset(matrix[i], 0, sizeof(int)*N);
        for (int j = 0; j < vs[i].size(); ++j) {
            matrix[i][vs[i][j] - 1] = 1;
        }
    }

    for (int i = 0; i < N; ++i) {
        for (int j = 0; j < N; ++j) {
            //printf("%2d", matrix[i][j]);
            putchar(matrix[i][j] + '0');
            if (j != N - 1)
                putchar(' ');
        }
        delete[] matrix[i];
        printf("\n");
    }
    delete[] matrix;

    return 0;
}

C++: #include<iostream>
#include<string>
#include<vector>
#include<cstdio>
#include<sstream>
#include<algorithm>
#include<cmath>
#include<map>
using namespace std;
int G[101][101];
int main(){
int n;
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]=1;
}
}
for(int i=1;i<=n;i++){
	for(int j=1;j<=n;j++){
	cout<<G[i][j];
	(j==n)?cout<<endl:cout<<" ";
	}
}
return 0;
}

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

int main()
{
    int n;
    cin >> n;
    int adjacency_matrices[n][n];
    for(int i = 0; i < n; i++)
        for(int j = 0; j < n; j++)
            adjacency_matrices[i][j] = 0;
    int vertex;
    int degree;
    for(int i = 0; i < n; i++)
    {
        cin >> vertex;
        cin >> degree;
        int to_v;
        for(int j = 0; j < degree; j++)
        {
            cin >> to_v;
            adjacency_matrices[vertex - 1][to_v - 1] = 1;
        }
    }

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

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

int a[101][101] = {0}; //???????????????u??¨u?????£??\?????????????????????v  u??????v???????????£???????????°1

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

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

  for(int i = 1; i <= n; i++) {
    for(int j = 1; j <= n; j++) {
      cout << a[i][j];

      cout << " ";
    }
    cout <<  endl;
  }
}

C++: #include<iostream>

using namespace std;

int main(){
  int n;
  cin >> n;
  int i;
  int a[150][150];
  int x,y;
  for (x = 0; x < n; x++) {
    for (y = 0; y < n; y++) {
      a[x][y]=0;
    }
  }

  for (i = 0; i < n; i++) {
    int l;
    cin >> l;
    int k;
    cin >> k;
    int j;
    for (j = 0; j < k; j++) {
      int m=0;
      cin >> m;
      a[l-1][m-1]=1;
    }

  }

  for (x = 0; x < n; x++) {
    for (y = 0; y < n; y++) {
      printf("%d ",a[x][y]);
    }printf("?\n");
  }

  return 0;
}

C++: #include <iostream>
#include <cstdio>
#include <cstdlib>

using namespace std;

static const int N = 100;

int main()
{
    int M[N][N];

    int num, vertexId, numOfEdge, targetVertex;

    scanf("%d", &num);

    for (int i = 0; i < num; i++) {
        for (int j = 0; j < num; j++) {
            M[i][j] = 0;
        }
    }

    for (int i = 0; i < num; i++) {
        scanf("%d %d", &vertexId, &numOfEdge);
        vertexId--; //change to idx
        for (int j = 0; j < numOfEdge; j++) {
            scanf("%d", &targetVertex);
            targetVertex--;
            M[vertexId][targetVertex] = 1;
        }
    }

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

    return 0;
}

C++: #include <iostream>
#include <vector>
#include <cassert>
#include <algorithm>
#include <functional>

using namespace std;
    
#include <iostream>
#include <vector>
#include <cassert>
#include <algorithm>
#include <functional>
#include <cmath>
#include <iomanip>
#include <limits>
#include <bits/stdc++.h>
using namespace std;
int main(){
    int n;
    cin >> n;
    vector<vector<int>> vec(n);
    vector<int> SIZE;
    for(int i=0;i<n;i++){
        int x;
        cin >> x;
        int num;
        cin >> num;
        SIZE.push_back(num);
        for(int j = 0;j< num;j++){
            int y;
            cin >> y;
            vec[x-1].push_back(y-1) ;
        }
    }
    for(int i=0;i<n;i++){
        for(int j=0;j<n;j++){
            bool hantei=0;
            for(int k=0;k<SIZE[i];k++){
                if(vec[i][k]==j) {cout << 1 <<" "; hantei=1;}
            }
            if(hantei==0) cout <<0<<" ";
        }cout << endl;
    }
}