adding static files to django code example

Example 1: how to use static files in django

#In your templates, use the static template tag to build the URL for the given relative path using the configured STATICFILES_STORAGE.
{% load static %}
<img src="{% static 'my_app/example.jpg' %}" alt="My image">

Example 2: add static file in django

STATICFILES_DIRS = [
    BASE_DIR / "static",
    '/var/www/static/',
]

Example 3: using static files in django

Input: 
         1
       /   \
      2     3
Output: 1
Explanation: 
Tilt of node 2 : 0
Tilt of node 3 : 0
Tilt of node 1 : |2-3| = 1
Tilt of binary tree : 0 + 0 + 1 = 1