蓝桥杯不要再圈米了

	for (int i = 1, tot, x, y; i <= m; i ++) {
		cin >> tot;
		if (tot == 1) {
			cin >> x >> y;
			for (int i = x; i <= y; i ++) op[i] = (op[i] == '(' ? ')' : '(');
		}
		if (tot == 2) {
			cin >> x;
			int res = 0;
			for (int i = x, cnt = 0; i <= n; i ++) {
				if (op[i] == '(') cnt ++;
				if (op[i] == ')') {
					if (cnt == 0) break;
					if (cnt) cnt --;
					if (cnt == 0) res = i; 
				}
			}
			cout << res << '\n';
  }
  	}
  }