/* 4. ´ÙÀ½ ÇÁ·Î±×·¥ÀÇ Ãâ·ÂÀ» ½á¶ó. */


#include <stdio.h>

int key[5] = { 1, 2, 3, 4, 5};

int f(int n)
{
	if (n == 0) return 1;
	if (n == 1) return 1;
	return f(n-1) + f(n-2) + 1;
}

main()
{
	int sum;
	int i;

	sum = 0;
	for (i = 0; i < 5; i++) {
		sum = sum + key[i];
		if (sum > 0) {
			printf("f(%d) = %d\n",i,f(i));
		}
	}
	printf("f(%d) = %d\n",i,f(i));
}