Week 3: Graph Data Structures and Algorithms (117)

1^st iteration i=0:

`tc`	[0]	[1]	[2]	[3]
[0]	0	1	1	1
[1]	1	1	1	1
[2]	0	1	0	0
[3]	0	0	0	0

2^nd iteration i=1:

`tc`	[0]	[1]	[2]	[3]
[0]	1	1	1	1
[1]	1	1	1	1
[2]	1	1	1	1
[3]	0	0	0	0

3^rd iteration i=2: unchanged

4^th iteration i=3: unchanged