principles of combinatorics and their applications in counting and optimization.
Keywords
photo,
color image,
horizontal,
no people,
closeup,
indoor,
communication,
number,
people,
education,
britain,
technology,
business,
adult,
calculating,
concept,
key,
learning,
lifestyle,
mathematic,
one person,
vertical,
computer,
modern,
full frame,
part of,
white color,
calculating machine,
chart,
classroom,
connection,
futuristic,
intelligence,
playing,
solution,
touching,
still life,
text,
blue,
childhood,
human hand,
in a row,
many-coloured,
pattern