问题 A: Star in Parentheses 时间限制: 1 Sec 内存限制: 128 MB 题目描述 You are given a string S, which is balanced parentheses with a star symbol '*' inserted. Any balanced parentheses can be constructed using the following rules: An empty string is balanced. Conc…
Star in Parentheses 题目描述 You are given a string S, which is balanced parentheses with a star symbol '*' inserted. Any balanced parentheses can be constructed using the following rules: An empty string is balanced. Concatenation of two balanced parent…
The Star Arthur C. Clarke It is three thousand light-years to the Vatican. Once, I believed that space could have no power over faith, just as I believed that the heavens declared the glory of God's handiwork. Now I have seen that handiwork, and my f…
Remove the minimum number of invalid parentheses in order to make the input string valid. Return all possible results. Note: The input string may contain letters other than the parentheses ( and ). Examples: "()())()" -> ["()()()",…
Given a string of numbers and operators, return all possible results from computing all the different possible ways to group numbers and operators. The valid operators are +, -and *. Example 1 Input: "2-1-1". ((2-1)-1) = 0 (2-(1-1)) = 2 Output: …
Given a string containing just the characters '(' and ')', find the length of the longest valid (well-formed) parentheses substring. For "(()", the longest valid parentheses substring is "()", which has length = 2. Another example is &…
Given n pairs of parentheses, write a function to generate all combinations of well-formed parentheses. For example, given n = 3, a solution set is: "((()))", "(()())", "(())()", "()(())", "()()()" 在LeetCo…
