View Code of Problem 23

#include<stdio.h>
int main()
{
	int m;
	int a[100000];
	int i; 
	while(scanf("%d",&m)!=EOF)
	{
		if(m==0) break;
		a[0]=0;
		a[1]=1;
		for(i=2;i<=m+1;i++)
		{
			a[i]=a[i-1]+a[i-2];
		}
		printf("%d\n",a[m+1]);
	}
}