百练 2942 吃糖果

题目链接：http://bailian.openjudge.cn/practice/2942

# include <stdio.h>
int main()
{
	int str[20];
	int N,i;
	
	scanf("%d",&N);
	
	if(N>0&&N<20)
	{
		str[0]=1;
		str[1]=1;
		for(i=1;i<N;i++)
			str[i+1]=str[i]+str[i-1];	
		printf("%d\n",str[N]);
	}
	return 0;
}