text: #include <iostream>
  
  using namespace std;
  
  int main()
  {
      int N = (5 * 6) / 2;
      int fib[N];
      fib[0] = 0, fib[1] = 1;
      for (int i = 2; i <= N; i++)
      {
          fib[i] = fib[i - 1] + fib[i - 2];
      }
      for (int i = 1; i <= 5; i++)
      {
          int ind = 0;
          for (int j = 1; j <= i; j++)
          {
              cout << fib[ind++];
          }
          cout << endl;
      }
  
      return 0;
  }