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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5.     int n;
  6.     cin >> n;
  7.     int a[n];
  8.     a[0] = 1;
  9.     a[1] = 1;
  10.     for (int i = 2; i <= n; i++)
  11.     {
  12.         a[i] = (a[i - 1] + a[i - 2] + a[i - 3]) % 10;
  13.     }
  14.     cout << a[n];
  15.     return 0;
  16. }
Success #stdin #stdout 0s 4404KB
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https://ideone.com/8dmuZO
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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