. 题目 You are given the root of a full binary tree with the following properties: Leaf nodes have either the value 0 or 1, where 0 represents False and 1 represents True. Non-leaf nodes have eithe
题目: Evaluate the value of an arithmetic expression in Reverse Polish Notation. Valid operators are +, -, *, /. Each operand may be an integer or another expression. Some examples: ["2", "1",
题目 Evaluate the value of an arithmetic expression in Reverse Polish Notation. Valid operators are +, -, *, /. Each operand may be an integer or another expression. Note: Division between two integ
题目: Equations are given in the format A / B = k, whereA andB are variables represented as strings, andk is a real number (floating point number). Given some queries, return the answers. If the answer
题目 Evaluate the value of an arithmetic expression in Reverse Polish Notation. Valid operators are +, -, *, /. Each operand may be an integer or another expression. Some examples: ["2", "1", "
https://leetcode.com/problems/evaluate-reverse-polish-notation/?tab=Description 开一个栈,遇到数字压栈,遇到运算符就从栈中弹出两个元素做相应的计算然后再压回去。 Time complexity: O(n) Space complexity: O(n) class Solution {public:int evalR
Execution context was destroyed产生的场景 在NodeJs中使用Puppeteer中Page对象的evaluate方法执行脚本,深入使用后一定遇到过Error: Execution context was destroyed 错误。这通常发生在浏览器正在执行一个任务,紧接使用方并发提交了另一个脚本到浏览器,导致浏览器发生跳转。这时第一次提交的任务会抛出异常,产生该错