动态规划来做。
class Solution {
public:
vector generateParenthesis(int n) {
vector> dp(n+1);
dp[0] = {""};
dp[1] = {"()"};
for(int i=2; i<=n; i++){
for(int j=0; j 
动态规划来做。
class Solution {
public:
vector generateParenthesis(int n) {
vector> dp(n+1);
dp[0] = {""};
dp[1] = {"()"};
for(int i=2; i<=n; i++){
for(int j=0; j