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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define int long long
  4. #define endl '\n'
  5. #define all(x) x.begin(), x.end()
  6. #define rall(x) x.rbegin(), x.rend()
  7. const int MOD = 1e9 + 7;
  8. int phi(int n)
  9. {
  10.     int result = n;
  11.     for (int i = 2; i * i <= n; i++)
  12.     {
  13.         if (n % i == 0)
  14.         {
  15.             while (n % i == 0)
  16.                 n /= i;
  17.             result -= result / i;
  18.         }
  19.     }
  20.     if (n > 1)
  21.         result -= result / n;
  22.     return result;
  23. }
  24. int32_t main()
  25. {
  26.     ios::sync_with_stdio(false);
  27.     cin.tie(NULL);
  28.     int a, b;
  29.     cin >> a >> b;
  30.     cout << phi(a) << " " << phi(b) << " " << phi(a*b) << endl;
  31.     return 0;
  32. }
Success #stdin #stdout 0.01s 5304KB
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37642648006656 61133615020032 -8481756005237607936
https://ideone.com/KnUEpq
language:
C++ (gcc 8.3)
created:
9 days ago
visibility:
public

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