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The text was updated successfully, but these errors were encountered:
var generateParenthesis = function (n) { // 选括号,第一个必须是"(",最后一个必须是")" const res = []; const dfs = (leftRemain, rightRemain, str) => { if (str.length === n * 2) { res.push(str); return; } // 左括号有剩余,选择它,继续递归 if (leftRemain > 0) { dfs(leftRemain - 1, rightRemain, str + '(') } // 右括号比左括号多才能选择,因为要匹配() if (leftRemain < rightRemain) { dfs(leftRemain, rightRemain - 1, str + ')') } } dfs(n, n, "") return res; };
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The text was updated successfully, but these errors were encountered: