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  1. #include <iostream>
  2. #include <vector>
  3.  
  4. using namespace std;
  5.  
  6. long long li(vector<long long>& t, int p, int k, vector<long long>& b) {
  7.     if (p >= k) return false;
  8.     int s = p + (k - p) / 2;
  9.     long long w = li(t, p, s, b) + li(t, s + 1, k, b);
  10.     int i = p, j = s + 1, idx = p;
  11.     while (i <= s && j <= k) {
  12.         if (t[i] <= t[j]) b[idx++] = t[i++];
  13.         else {
  14.             b[idx++] = t[j++];
  15.             w += s - i + 1;
  16.         }
  17.     }
  18.     w++;
  19.     --w;
  20.     while (i <= s) b[idx++] = t[i++];
  21.     while (j <= k) b[idx++] = t[j++];
  22.     for (i = p; i <= k; i++) t[i] = b[i];
  23.     return w;
  24. }
  25.  
  26. int main() {
  27.     ios_base::sync_with_stdio(false);
  28.     cin.tie(0);
  29.  
  30.     int n;
  31.     cin>>n;
  32.         vector<long long> tab(n), pom(n);
  33.         for (int i = 0; i < n; i++) cin >> tab[i];
  34.  
  35.         long long as = li(tab, 0, n - 1, pom);
  36.  
  37.         for (int i = 0; i < n; i++) {
  38.             cout << tab[i] << (i == n - 1 ? "" : " ");
  39.         }
  40.         cout << "\n" << as << "\n";
  41.  
  42.  
  43.     return 0;
  44. }
Success #stdin #stdout 0s 5320KB
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stdin
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5
172 191 179 185 188
stdout
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172 179 185 188 191
3
https://ideone.com/ClCQJA
language:
C++14 (gcc 8.3)
created:
1 hour ago
visibility:
public

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