View Code of Problem 23

#include "stdio.h"
main()
{
    
	int n,i,a[100];
	a[0]=1;
	a[1]=2;
	while(scanf("%d",&n)!=EOF&&n)
	{
		if(n==1||n==2)
		{
			printf("%ld\n",n);
		}
		else
		{
			for(i=2;i<n;i++)
			{
		    	a[i]=a[i-1]+a[i-2];
			}
			printf("%lld\n",a[i-1]);
		}
	}
	return 0;
}