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  1. //Bai 9
  2.  
  3. #include<bits/stdc++.h>
  4. using namespace std;
  5. #define el "\n"
  6. #define ll long long
  7. #define ull unsigned long long
  8. #define se second
  9. #define fi first
  10. #define be begin()
  11. #define en end()
  12. #define Faster cin.tie(0); cout.tie(0); ios_base::sync_with_stdio(0);
  13.  
  14. void Run(int n)
  15. {
  16.     int ok = 0;
  17.     for(int i = 1; i <= sqrt(n); i++)
  18.     {
  19.         if(i * (i + 5) == n)
  20.         {
  21.             cout << i;
  22.             ok = 1;
  23.             break;
  24.         }
  25.     }
  26.     if(ok == 0) cout << "NO";
  27. }
  28. int main()
  29. {
  30.     Faster;
  31.     int n; cin >> n;
  32.     Run(n);
  33.     return 0;
  34. }
  35.  
  36.  
Success #stdin #stdout 0.01s 5276KB
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stdin
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Standard input is empty
stdout
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NO
https://ideone.com/axmlla
language:
C++14 (gcc 8.3)
created:
3 days ago
visibility:
public

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