View Code of Problem 23

#include <iostream>
using namespace std;
int main(){
	long long a[91];
	a[0]=1;
	a[1]=1;
	for(int i=2;i<91;i++){
		a[i]=a[i-1]+a[i-2];
	}
	
	int n;
	while(1){
		cin>>n;
		if(n!=0)
			cout<<a[n]<<endl;
		else 
			break;
	}
	
}