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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5.     ios_base::sync_with_stdio(0);
  6.     cin.tie(0);
  7.     cout.tie(0);
  8.  
  9.     int n;
  10.     cin >> n;
  11.  
  12.     // Fibonacci ardıcıllığını hesablamaq üçün iki dəyişən
  13.     long long a = 0, b = 1;
  14.  
  15.     // Fibonacci ardıcıllığının n-ci elementini tapmaq
  16.     for (int i = 2; i <= n; ++i) {
  17.         long long next = a + b;
  18.         a = b;
  19.         b = next;
  20.     }
  21.  
  22.     // İlk iki element üçün xüsusi hal
  23.     if (n == 1) cout << 0 << "\n";
  24.     else if (n == 2) cout << 1 << "\n";
  25.     else cout << b << "\n";
  26.  
  27.     return 0;
  28. }
  29.  
Success #stdin #stdout 0s 5292KB
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4609061770539504808
https://ideone.com/8dfOOS
language:
C++ (gcc 8.3)
created:
5 hours ago
visibility:
public

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