[leetcode-921-Minimum Add to Make Parentheses Valid]
Givenastring S of '(' and ')' parentheses,weaddtheminimumnumberofparentheses( '(' or ')',andinanypositions)sothattheresultingparenthesesstringisvalid....
Python print报错：SyntaxError: Missing parentheses in call to 'print'. Did you mean print
使用Python的print打印值报错：>>> print "Hello world!" File "<stdin>", line 1 print "Hello world!" ^SyntaxError: Missin...
LeetCode（49）-Valid Parentheses
题目：Givenastringcontainingjustthecharacters'(',')','{','}','['and']',determineiftheinputstringisvalid.Thebracketsmustcloseinthecorrectorder,"()"and"()[...
20. Valid Parentheses
1.题目：Givenastringcontainingjustthecharacters'(',')','{','}','['and']',determineiftheinputstringisvalid.Thebracketsmustcloseinthecorrectorder,"()"and"(...
【LeetCode】241. Different Ways to Add Parentheses
DifferentWaystoAddParenthesesGivenastringofnumbersandoperators,returnallpossibleresultsfromcomputingallthedifferentpossiblewaystogroupnumbersandoperat...
LeetCode Generate Parentheses 构造括号串（DFS简单题）
题意：产生n对合法括号的所有组合，用vector<string>返回。思路：递归和迭代都可以产生。复杂度都可以为O(2n*合法的括号组合数)，即每次产生出的括号序列都保证是合法的。方法都是差不多的，就是记录当前产生的串中含有左括号的个数cnt，如果出现右括号，就将cnt--。当长度为2*...