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.
(A) Consecutive nodes are merged. (B) Dead end (dotted circle) is removed. (C) Bubble (dotted circle) is simplified where low-coverage path of the two paths that caused it was removed. (D) X-cut is simplified by splitting the connections into two parallel paths.
