def main():
h = heap.MinHeap(1000)
h.insert(2, 2)
h.insert(3, 3)
h.insert(5, 5)
last = 0
for _ in range(0, 20):
i, el = h.extract_min()
if last != el:
last = el
print(str(_) + ". " + str(el) + ", ")
h.insert(2 * el, 2 * el)
h.insert(3 * el, 3 * el)
h.insert(5 * el, 5 * el)
