Thread: how to create an adjacency matrix?

i want to input values as

a[0][0]=1 a[0][1]=3
a[1][0]=2 a[1][1]=3

1 3
2 3

i want an adjacency matrix from this as:
m[0][0]=0, m[0][1]=0, m[0][2]=1
m[1][0]=0, m[1][1]=0, m[1][2]=1
m[2][0]=1, m[2][1]=1, m[2][2]=0

0 0 1
0 0 1
1 1 0

How can i do?
please help me with codes....