View Code of Problem 23

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