LeetCode 23. Merge k Sorted Lists solutions All In One
LeetCode 23. Merge k Sorted Lists solutions All In One
TypeScript
solutions
/**
* Definition for singly-linked list.
* class ListNode {
* val: number
* next: ListNode | null
* constructor(val?: number, next?: ListNode | null) {
* this.val = (val===undefined ? 0 : val)
* this.next = (next===undefined ? null : next)
* }
* }
*/
function mergeKLists(lists: Array<ListNode | null>): ListNode | null {
let arr = [];
for(let list of lists) {
let head = list;
while(head) {
arr.push(head.val);
head = head.next;
}
}
arr.sort((a, b) => a - b);
// linked-list generator
return listGenerator(arr) ?? null;
};
function listGenerator(arr: Array<number>): ListNode | null {
if(!arr.length) {
return null;
}
let root = new ListNode(arr[0]);
let head = root;
for(let i = 1; i < arr.length; i++) {
let node = new ListNode(arr[i], null);
head.next = node;
head = head.next;
}
return root;
}
Runtime 76ms Beats 95.65% of users with TypeScript
https://leetcode.com/problems/merge-k-sorted-lists/
demos
/**
* Definition for singly-linked list.
* class ListNode {
* val: number
* next: ListNode | null
* constructor(val?: number, next?: ListNode | null) {
* this.val = (val===undefined ? 0 : val)
* this.next = (next===undefined ? null : next)
* }
* }
*/
function mergeKLists(lists: Array<ListNode | null>): ListNode | null {
// linked-list generator
// console.log(`lists `, lists)
// console.log(`lists[0] `, lists[0])
let arr = [];
for(let list of lists) {
// arr.push(...list);
let head = list;
while(head) {
arr.push(head.val);
head = head.next;
}
}
arr.sort((a, b) => a - b);
// console.log(`arr =`, arr);
return listGenerator(arr) ?? null;
};
function listGenerator(arr: Array<number>): ListNode | null {
if(!arr.length) {
return null;
}
let root = new ListNode(arr[0]);
let head = root;
for(let i = 1; i < arr.length; i++) {
let node = new ListNode(arr[i], null);
head.next = node;
head = head.next;
}
console.log(`root =`, root);
return root;
}
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ListNode
链表节点
class ListNode {
constructor(val, next) {
this.val = (val===undefined ? 0 : val)
this.next = (next===undefined ? null : next)
}
// add
// remove
}
// Definition for singly-linked list.
class ListNode {
val: number
next: ListNode | null
constructor(val?: number, next?: ListNode | null) {
this.val = (val===undefined ? 0 : val)
this.next = (next===undefined ? null : next)
}
// add
// remove
}
Linked List Generator
链表生成器
function listGenerator(arr: Array<number>): ListNode | null {
if(!arr.length) {
return null;
}
let root = new ListNode(arr[0]);
let head = root;
for(let i = 1; i < arr.length; i++) {
let node = new ListNode(arr[i], null);
head.next = node;
head = head.next;
}
// console.log(`root =`, root);
return root;
}
refs
js Linked List Generator All In One
https://www.cnblogs.com/xgqfrms/p/16637915.html
https://zzk.cnblogs.com/my/s/blogpost-p?Keywords=list generator
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