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  1. #include <bits/stdc++.h>
  2. #define ll long long
  3. #define ld long double
  4. #define nl "\n"
  5. #define OO 0x3f3f3f3f
  6. using namespace std;
  7.  
  8. void ta2to2a()
  9. {
  10.     ios_base::sync_with_stdio(false), cout.tie(nullptr), cin.tie(nullptr);
  11. #ifndef ONLINE_JUDGE
  12.     freopen("input.txt", "r", stdin);
  13.     freopen("output.txt", "w", stdout);
  14. #endif
  15. }
  16. int n, m;
  17. vector<ll> v;
  18. void sequence(int start)
  19. {
  20.     v.push_back(start);
  21.     if (v.size() == n)
  22.     {
  23.         for (auto it : v)
  24.         {
  25.             cout << it << " ";
  26.         }
  27.         cout << nl;
  28.         return;
  29.     }
  30.     for (int i = start; i < m; i++)
  31.     {
  32.         sequence(i + 1);
  33.         v.pop_back();
  34.     }
  35. }
  36. void solve()
  37. {
  38.     cin >> n >> m;
  39.     for (int i = 1; i <= n; i++)
  40.     {
  41.         sequence(i);
  42.         v.clear();
  43.     }
  44. }
  45. int main()
  46. {
  47.     ta2to2a();
  48.     int t = 1;
  49.     // cin >> t;
  50.     while (t--)
  51.     {
  52.         solve();
  53.     }
  54. }
Success #stdin #stdout 0.01s 5320KB
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https://ideone.com/7lhL1f
language:
C++14 (gcc 8.3)
created:
1 day ago
visibility:
public

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