LeetCode-22-括号生成(回溯法)

LeetCode-22-括号生成(回溯法)

/*括号生成*/
#include
#include
#include
using namespace std;
void generate(string cur,vector &res,int left,int right,int n){//回溯法--递归法
	if (right == n){
		res.push_back(cur);
		//cout << cur << endl;
	}
	if (left right){
		generate(cur+')', res, left, right + 1, n);
	}
}
int main(){
	int n;
	cin >> n;
	int left = 0, right = 0;//左右括号的对数
	vector res;//构建一个存储string类型的数组
	generate("",res,left, right, n);
	//遍历数组并输出
	vector::iterator it;
	for (it = res.begin(); it != res.end(); it++)
	{
		cout << *it << endl;
	}
	return 0;
}

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