题解 | #小乐乐走台阶#

//BC166 小乐乐走台阶 
#include<stdio.h>
int Fun(int x)
{
	if (x <= 2)
		return x;
	else
		return Fun(x - 1) + Fun(x - 2);
}
int main()
{
	int n = 0; 
	scanf("%d", &n); 
	int ret = Fun(n);
	printf("%d\n", ret);
	return 0; 
}