Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Reachability matrix
| No. | S1 | S2 | S3 | S4 | S5 | S6 | S7 | S8 | S9 | S10 |
| S1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| S2 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| S3 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| S4 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| S5 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
| S6 | 1 | 1 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 1 |
| S7 | 1 | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 1 |
| S8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 |
| S9 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 |
| S10 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
