csnotes/370/notes/adj-list.md
Medium Fries ea2aa8d2a6 yote
2019-03-15 01:26:26 -07:00

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# Adjacency list
Imagine 8 nodes with no connections
To store this data in an _adjacency list_ we need __n__ items to store them.
We'll have 0 __e__dges however so in total our space is (n+e) == (n)
# Adjacency matrix
space: O(n^2)
The convention for notation btw is [x,y] meaning:
* _from x to y_
# Breadth first search
add neighbors of current to queue
go through current's neighbors and add their neighbors to queue
add neighbor's neighbors
keep going until there are no more neighbors to add
go through queue and start popping members out of the queue
# Depth first search
Here we're going deeper into the neighbors
_once we have a starting point_
_available just means that node has a non-visited neighbor_
if available go to a neighbor
if no neighbors available visit
goto 1
# Kahn Sort
# Graph Coloring
When figuring out how many colors we need for the graph, we should note the degree of the graph