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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define int long long
  4. #define vi vector<int>
  5. #define fi first
  6. #define se second
  7. #define pb push_back
  8. #define ii pair<int , int>
  9. #define pq priority_queue
  10. #define iii pair<int , pair<int , int>>
  11. #define fo(i,l,r) for(int i=l;i<=r;i++)
  12. #define fod(i,r,l) for(int i=r;i>=l;i--)
  13. #define fill(f,x) memset(f,x,sizeof(f))
  14. #define NAME "file"
  15.  
  16. const int N = 2e5 + 5, mod = 1e9 + 7;
  17. int n , k , a[21] , b[21] , p[21] , cnt = 0;
  18.  
  19. void sol(int i)
  20. {
  21.     if (i > n)
  22.     {
  23.         stack <int> st;
  24.         bool check = true;
  25.         int dem = 0;
  26.         for (int j = 1 ; j <= n ; j++)
  27.         {
  28.             if (p[j] == 0)
  29.             {
  30.                 st.push(0);
  31.                 dem++; // số ngoặc mở liên tiếp
  32.                 if (dem > k) 
  33.                 {
  34.                     check = false;
  35.                     break;
  36.                 }
  37.             }
  38.             else
  39.             {
  40.                 dem = 0;
  41.                 if (st.empty())
  42.                 {
  43.                     check = false;
  44.                     break;
  45.                 }
  46.                 st.pop();
  47.             }
  48.         }
  49.         if (st.empty() && check)
  50.         {
  51.             for (int j = 1 ; j <= n ; j++)
  52.             {
  53.                 if (p[j] == 0) cout << '(';
  54.                 else cout << ')';
  55.             }
  56.             cout << '\n';
  57.         }
  58.     }
  59.     else
  60.     {
  61.         for (int j = 0 ; j <= 1 ; j++)
  62.         {
  63.             p[i] = j;
  64.             sol(i + 1);
  65.         }
  66.     }
  67. }
  68.  
  69. signed main()
  70. {
  71.     ios_base::sync_with_stdio(0);
  72.     cin.tie(0);  cout.tie(0);
  73.     //freopen(NAME".INP" , "r" , stdin);
  74.     //freopen(NAME".OUT" , "w" , stdout);
  75.  
  76.     cin >> n >> k;
  77.     sol(1);
  78. }
  79. // haronnee_
Success #stdin #stdout 0.01s 5296KB
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language:

						
C++ (gcc 8.3)

					

					

						
created:
								
						
3 days ago

					

					

						
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