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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5.     int N, sum = 0;
  6.  
  7.     cout << "1  : ";
  8.     cin >> N;
  9.  
  10.  
  11.     if (N < 1) {
  12.         cout << "1" << endl;
  13.         return 1;  
  14.     }
  15.  
  16.     for (int i = 1; i <= N; i++) {
  17.         sum += i;
  18.     }
  19.  
  20.     cout << "   1  " << N << " : " << sum << endl;
  21.  
  22.     return 0;
  23. }
Success #stdin #stdout 0s 5284KB
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stdin
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Standard input is empty
stdout
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1  :    1  22015 : 242341120
https://ideone.com/yUDc2F
language:
C++ (gcc 8.3)
created:
9 days ago
visibility:
public

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