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Josif_tepe

Untitled

Jan 26th, 2024
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C++ 0.25 KB | None | 0 0
  1. #include <iostream>
  2. using namespace std;
  3. int main() {
  4.     int k;
  5.     cin >> k;
  6.    
  7.     int broj = 1;
  8.     int zbir = 0;
  9.     for(int i = 1; i <= k; i += 1) {
  10.         zbir += broj;
  11.         broj += 3;
  12.     }
  13.     cout << zbir << endl;
  14.     return 0;
  15. }
  16.  
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