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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int n;
  5.  
  6. void sub1()
  7. {
  8.     int cnt = 0;
  9.     for (int i = 1; i <= n; i ++)
  10.     if (n % i == 0) cnt ++;
  11.     cout << cnt << '\n';
  12. }
  13.  
  14. void sub2()
  15. {
  16.     int cnt = 0;
  17.     for (int i = 1; i * i <= n; i ++)
  18.     {
  19.         if (n % i == 0)
  20.         {
  21.             cnt ++;
  22.             if (i != n/i) cnt ++;
  23.         }
  24.     }
  25.     cout << cnt << '\n';
  26. }
  27.  
  28. int main()
  29. {
  30.     ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  31.     freopen("KIENHANG.INP", "r", stdin);
  32.     freopen("KIENHANG.OUT", "w", stdout);
  33.  
  34.     cin >> n;
  35.  
  36.     if (n <= 1e6) sub1();
  37.     else sub2();
  38.  
  39.     return 0;
  40. }
Success #stdin #stdout 0s 5320KB
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https://ideone.com/JGTdYR
language:
C++14 (gcc 8.3)
created:
39 days ago
visibility:
secret

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