20240524 Finished
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@ -137,4 +137,5 @@ mod p452_minimum_number_of_arrows_to_burst_balloons;
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mod p71_simplify_path;
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mod p155_min_stack;
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mod p150_evaluate_reverse_polish_notation;
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mod p224_basic_calculator;
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mod p224_basic_calculator;
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mod p21_merge_two_sorted_lists;
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src/problem/p21_merge_two_sorted_lists.rs
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67
src/problem/p21_merge_two_sorted_lists.rs
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@ -0,0 +1,67 @@
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/**
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* [21] Merge Two Sorted Lists
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*/
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pub struct Solution {}
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use std::borrow::{Borrow, BorrowMut};
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use crate::util::linked_list::{ListNode, to_list};
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// submission codes start here
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// Definition for singly-linked list.
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// #[derive(PartialEq, Eq, Clone, Debug)]
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// pub struct ListNode {
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// pub val: i32,
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// pub next: Option<Box<ListNode>>
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// }
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//
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// impl ListNode {
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// #[inline]
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// fn new(val: i32) -> Self {
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// ListNode {
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// next: None,
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// val
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// }
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// }
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// }
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impl Solution {
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pub fn merge_two_lists(list1: Option<Box<ListNode>>, list2: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
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let mut head = None;
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let mut now = &mut head;
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let (mut list1, mut list2) = (list1, list2);
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*now = loop {
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match (list1, list2) {
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(Some(mut a), Some(mut b)) => {
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if a.val < b.val {
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list1 = a.next.take();
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list2 = Some(b);
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now = &mut now.insert(a).next;
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} else {
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list1 = Some(a);
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list2 = b.next.take();
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now = &mut now.insert(b).next
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}
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},
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(x, y) => break x.or(y)
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}
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};
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head
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}
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}
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// submission codes end
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn test_21() {
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}
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}
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