def processSaving(self, saving):
(k, i, j, s) = saving
x = self.paths[i]
y = self.paths[j]
if uf.joinable(self.capacity, x, y):
uf.union(x, y)
self.used_savings.append(k)
self.solution -= s
def feasibleSaving(self, saving):
(_, i, j, _) = saving
return uf.joinable(self.capacity, self.paths[i], self.paths[j])