View Code of Problem 23

#include<iostream>
using namespace std;
int main()
{
    	int m;
		long long a[100];
		a[1]=1;a[2]=2;
		for(int i=3;i<100;i++)
		{
			a[i]=a[i-1]+a[i-2];
		}
        	while(cin>>m&&m!=0)
	        {
	                
	                cout<<a[m]<<endl;
	        } 
 }