一.for循环方式实现输出[1, 2, 3, ..., n] var n = 5; function test(n){ var arr=[]; for( var i = 1; i <= n; i++){ arr.push(i) } return arr; } console.log(test(n)); //输出:[1, 2, 3, 4, 5] 二.利用递归实现输出[1, 2, 3, ..., n] var n = 10; function test(n){ var arr = []; retur…
Unique Binary Search Trees II leetcode java [LeetCode]Unique Binary Search Trees II 异构二叉查找树II Unique Binary Search Trees II -- LeetCode 描述 Given n, generate all structurally unique BST's (binary search trees) that store values 1...n. For example,Give…
[Leetcode] Unique binary search trees 唯一二叉搜索树 Unique Binary Search Trees leetcode java 描述 Given n, how many structurally unique BST's (binary search trees) that store values 1...n? For example,Given n = 3, there are a total of 5 unique BST's. 1 3 3 2…
package com.swift; import java.util.Random; import java.util.Scanner; public class GuessBigSmall { public static void main(String[] args) { Scanner scan=new Scanner(System.in); Random random = new Random(); int number = random.nextInt(1000) + 1; for…
def test(ary): ds = {} for i in range(len(ary)): if ds.get(ary[i]): ds[ary[i]].append(i) else: ds[ary[i]] = [i] return ds if __name__ == '__main__': ary = [1,2,3,5,2,5,4] ds = test(ary) num = int(input("which number you want?")) print(ds[num]) 其…
问题描述: We are asking for a function to take a positive integer value, and return a list of all positive integer pairs whose values - when squared- sum to the given integer. For example, given the parameter 25, the function could return two pairs of 5,…
Problem Description A while ago it was quite cumbersome to create a message for the Short Message Service (SMS) on a mobile phone. This was because you only have nine keys and the alphabet has more than nine letters, so most characters could only be…
