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  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. int main()
  6. {
  7.  
  8.     int liczba, suma = 0;
  9.     cin >> liczba;
  10.  
  11.     if(liczba > 0 )
  12.     {
  13.  
  14.         for(int i=1; i <= liczba; i++)
  15.         {
  16.             suma +=i;
  17.         }
  18.         cout << suma;
  19.     }
  20.  
  21.     if(liczba < 0 )
  22.     {
  23.         for(int i=1; i >= liczba; i--)
  24.         {
  25.             suma +=i;
  26.         }
  27.         cout << suma;
  28.     }
  29.     if(liczba == 0) cout << 1;
  30.     return 0;
  31. }
Success #stdin #stdout 2.51s 2728KB
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stdin 
Standard input is empty
stdout 
-994320911
https://ideone.com/2Pudp
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

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