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- #include <iostream>
- #include <vector>
- using namespace std;
- void create_seq(vector<char>& state, int opened, int all, const int len) {
- if (all == len) {
- for (auto i : state) {
- cout << i;
- }
- cout << endl;
- return;
- }
- if (opened < len / 2) {
- state.push_back('(');
- create_seq(state, opened + 1, all + 1, len);
- state.pop_back();
- }
- ///
- if (all - opened < opened) {
- state.push_back(')');
- create_seq(state, opened, all + 1, len);
- state.pop_back();
- }
- return;
- }
- int main() {
- int n;
- cin >> n;
- vector<char> state;
- create_seq(state, 0, 0, 2 * n);
- return 0;
- }
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