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File: s-fibonacci.c

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#include <stdio.h>
#include <stdlib.h>

int fib(int n)
{
	if (n <= 2)
		return 1;
	return fib(n - 1) + fib(n - 2);
}

int main(int argc, char *argv[])
{
	int n = 8;

	if (argc > 1)
		n = atoi(argv[1]);

	return !!fib(n);
}