augment

A list producer that can be fused with foldr. This function is merely

augment g xs = g (:) xs

but GHC's simplifier will transform an expression of the form foldr k z (augment g xs), which may arise after inlining, to g k (foldr k z xs), which avoids producing an intermediate list.

Prepend the working directory to the search path. Note [Filepaths and Multiple Home Units]

i                                  0
For each edge a--->b insert into graph the edge a<---b . Then change the
i         (i,0,i)
label of every edge from a---->b to a------->b

where label (x,y,z)=(Max Capacity, Current flow, Residual capacity)