#include <iostream>

using namespace std;

unsigned int fibonacci(unsigned int n)
{
    if(n == 0)
        return 0;
    if(n == 1 || n == 2)
        return 1;
    return fibonacci(n - 1) + fibonacci(n - 2);
}

int main()
{
    for(unsigned i = 1; i <= 20; ++i)
        cout << fibonacci(i) << endl;
    return 0;
}