Method Push

go/1046-last-stone-weight.go:6–6

(x interface{})

func (h IntHeap) Less(i, j int) bool { return h[i] < h[j] }
func (h IntHeap) Swap(i, j int)      { h[i], h[j] = h[j], h[i] }
func (h *IntHeap) Push(x interface{}) {*h = append(*h, x.(int))}
func (h *IntHeap) Pop() interface{} {
	old := *h
	n := len(old)