Analysis
l Theorem: if sample with probabilities
ar/ke, and a > v/(v-f), then will find
augmenting path w.h.p.
l Runtime:
»  a always within a factor of 2 of “right” v/(v-f)
» As in compression, edge count O(a r n)
» So runtime O(r n Siv/i)=O*(nv)