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  1.  #include <bits/stdc++.h>
  2. #define ull unsigned long long
  3. #define ll long long
  4. #define el endl
  5. #define nl '\n'
  6. #define all(v) v.begin(), v.end()
  7. using namespace std;
  8.  
  9. void input()
  10. {
  11.     if (fopen("in.txt", "r"))
  12.     {
  13.         freopen("in.txt", "r", stdin);
  14.         freopen("out.txt", "w", stdout);
  15.     }
  16. }
  17.  
  18. void init()
  19. {
  20.     ios_base::sync_with_stdio(false);
  21.     cin.tie(nullptr);
  22. }
  23. int main()
  24. {
  25. Fast:
  26.     input();
  27.     init();
  28.     //---------------------------------------------------------------------------------------------------------------
  29.     int n;
  30.     cin >> n;
  31.     if (n * -1 == -n)
  32.     {
  33.         cout << n << nl;
  34.     }
  35.     else
  36.         cout << "enter another one (pos) ." << nl;
  37.  
  38.     return 0;
  39. }
Success #stdin #stdout 0.01s 5308KB
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Standard input is empty
stdout
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32766
https://ideone.com/K5Ge9B
language:
C++ (gcc 8.3)
created:
1 hour ago
visibility:
public

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