View Code of Problem 23

#include<stdio.h>
#include<string.h>
int main()
{
	int m,i;
	long long int a[90];
	a[0]=1;a[1]=2;
	for(i=2;i<90;i++)
		a[i]=a[i-1]+a[i-2];
	while(scanf("%d",&m)!=EOF&&m>0)
	{
		printf("%lld\n",a[m-1]);	
	}
}