View Code of Problem 23

#include<stdio.h>
int main(){
	int c[1000],b[100],k,n,i,j=0,front,rear;
	long 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;
}