Informal implementation of some algorithms from Graph Theory and Combinatorial Optimization which arise in the subject "Graphs and Network Optimization" from first course of the EUPLA (Escuela Universitaria Politecnica de La Almunia) degree of Data Engineering in Industrial Processes. References used are: Cook et al (1998, ISBN:0-471-55894-X), Korte, Vygen (2018) <doi:10.1007/978-3-662-56039-6>, Hromkovic (2004) <doi:10.1007/978-3-662-05269-3>, Hartmann, Weigt (2005, ISBN:978-3-527-40473-5).