There are however some critical subclasses of IP and MIP problems which can be successfully solvable, most notably issues in which the constraint matrix is totally unimodular and the right-hand sides with the constraints are integers or – more common – where the program has the full twin integrality (TDI) https://ricardoytlmo.blog4youth.com/28758735/a-secret-weapon-for-hire-someone-to-do-linear-programming-homework