fork download 
  1. #include <iostream>
  2. #include <vector>
  3. #include <algorithm>
  4.  
  5. using namespace std;
  6.  
  7. // Function to calculate the value of k for a given permutation
  8. int calculateK(const vector<int>& p) {
  9.     int k = 0;
  10.     int n = p.size();
  11.     for (int i = 0; i < n; ++i) {
  12.         if ((i + 1) % 2 == 1) {  // i+1 is odd
  13.             k &= p[i];
  14.         } else {                 // i+1 is even
  15.             k |= p[i];
  16.         }
  17.     }
  18.     return k;
  19. }
  20.  
  21. int main() {
  22.     int t;
  23.     cin >> t;
  24.  
  25.     while (t--) {
  26.         int n;
  27.         cin >> n;
  28.  
  29.         vector<int> perm(n);
  30.         for (int i = 0; i < n; ++i) {
  31.             perm[i] = i + 1;
  32.         }
  33.  
  34.         int maxK = 0;
  35.         vector<int> bestPerm = perm;
  36.  
  37.         // Try all permutations
  38.         do {
  39.             int currentK = calculateK(perm);
  40.             if (currentK > maxK) {
  41.                 maxK = currentK;
  42.                 bestPerm = perm;
  43.             }
  44.         } while (next_permutation(perm.begin(), perm.end()));
  45.  
  46.         // Output the maximum value of k
  47.         cout << maxK << endl;
  48.         // Output the permutation that gives the maximum k
  49.         for (int i = 0; i < n; ++i) {
  50.             cout << bestPerm[i] << " ";
  51.         }
  52.         cout << endl;
  53.     }
  54.  
  55.     return 0;
  56. }
  57.  
Success #stdin #stdout 0s 5284KB
comments (?)
stdin 
1
13
stdout 
0 1 2 3 4 5 6 7 8 9 10 11 12 13 
1 10 11 100 101 110 111 1000 1001 1010 1011 1100 1101
12
https://ideone.com/Vzv5Eg
language:
C++14 (gcc 8.3)
created:
10 hours ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!