Java program which reads a directed graph G Solved

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There are two standard ways to represent a graph G=(V,E), where V is a set of vertices and E is a set of edges; Adjacency list representation and Adjacency matrix representation.

An adjacency-list representation consists of an array Adj[|V|] of |V| lists, one for each vertex in V. For each u∈V, the adjacency list Adj[u] contains all vertices v such that there is an edge (u,v)∈E. That is, Adj[u] consists of all vertices adjacent to u in G.

An adjacency-matrix representation consists of |V| × |V| matrix A=aij such that aij=1 if (i,j)∈Eaij=0 otherwise.

Write a java program which reads a directed graph G represented by the adjacency list, and prints its adjacency-matrix representation. G consists of n(=|V|) vertices identified by their IDs 1,2,..,n respectively.


In the first line, an integer n is given. In the next nn lines, an adjacency list Adj[u] for vertex u are given in the following format:

u k v1 v2 … vk

u is vertex ID and k denotes its degree. vi are IDs of vertices adjacent to u.


As shown in the following sample output, print the adjacent-matrix representation of G. Put a single space character between aij .

Sample Input

1 2 2 4
2 1 4
3 0
4 1 3

Sample Output

0 1 0 1
0 0 0 1
0 0 0 0
0 0 1 0