Function minValNode

tasks/21.go:35–46

(fNode, sNode *ListNode)

}

func minValNode(fNode, sNode *ListNode) (*ListNode, bool) {
	if sNode == nil {
		return fNode, true
	}
	if fNode == nil {
		return sNode, false
	}
	if sNode.Val < fNode.Val {
		return sNode, false
	}
	return fNode, true
}