Pcjmy

```javascript function print(x) { return new Promise((resolve, reject) => { setTimeout(() => { console.log(x); resolve(); }, 1000) }) } function solve() { print(1) .then(() => { return print(2) }) .then(()...

题目链接：https://leetcode.cn/problems/n-queens 时间复杂度：O(N!) ```javascript /** * @param {number} n * @return {string[][]} */ var solveNQueens = function(n) { let ans=[]; let arr=new Array(n); // 存放解决方案 let col=new Array(n); // 标记当前列有没有皇后 let...

```javascript Promise.myAll = (promises) => { return new Promise((resolve, reject) => { let count = 0 let result = [] const len = promises.length if (len === 0) { return...