Method new

2181-merge-nodes-in-between-zeros.rs:10–15

(val: i32)

impl ListNode {
    #[inline]
    fn new(val: i32) -> Self {
        ListNode {
            next: None,
            val
        }
    }
}

pub fn merge_nodes(head: Option<Box<ListNode>>) -> Option<Box<ListNode>> {