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#[derive(PartialEq, Eq, Clone, Debug)]
pub struct ListNode {
pub val: i32,
pub next: Option<Box<ListNode>>
}
impl ListNode {
#[inline]
fn new(val: i32) -> Self {
ListNode {
next: None,
val
}
}
}
struct Solution {}
impl Solution {
pub fn add_two_numbers(l1: Option<Box<ListNode>>, l2: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
let mut result: Option<Box<ListNode>> = None;
let mut cur1 = &l1;
let mut cur2 = &l2;
let mut carry: i32 = 0;
{
let mut cur_res = &mut result;
loop {
if *cur1 == None && *cur2 == None && carry == 0 {
break;
} else {
let n1 = match cur1 {
Some(node) => {
cur1 = &cur1.as_ref().unwrap().next;
node.val
},
None => 0
};
let n2 = match cur2 {
Some(node) => {
cur2 = &cur2.as_ref().unwrap().next;
node.val
},
None => 0
};
let n = (n1 + n2 + carry) % 10;
carry = if (n1 + n2 + carry) >= 10 { 1 } else { 0 };
*cur_res = Some(Box::new(ListNode::new(n)));
cur_res = &mut cur_res.as_mut().unwrap().next;
continue;
}
}
}
result
}
}
fn vector2list(vec: Vec<i32>) -> Option<Box<ListNode>> {
let mut result: Option<Box<ListNode>> = None;
for i in 0..vec.len() {
let mut new_result = Some(Box::new(ListNode::new(vec[vec.len() - i - 1])));
new_result.as_mut().unwrap().next = result;
result = new_result;
}
result
}
fn list2vector(lst: Option<Box<ListNode>>) -> Vec<i32> {
let mut result: Vec<i32> = Vec::new();
let mut cur = &lst;
loop {
match cur {
None => break,
Some(node) => {
result.push(node.val);
cur = &node.next;
},
}
}
result
}
fn test(l1: Vec<i32>, l2: Vec<i32>) -> Vec<i32> {
list2vector(Solution::add_two_numbers(vector2list(l1), vector2list(l2)))
}
fn main() {
println!("{:?}", test(vec![1,2,3], vec![4,5,6]));
}
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