View Code of Problem 23

#include<iostream>
using namespace std;
int main()
{   int a[90],m;
    a[1]=1;a[2]=2;
    for(int i=3;i<91;i++)
     {
     	a[i]=a[i-1]+a[i-2]; 
	  } 
	while(cin>>m)
	{
		if(m==0) break;
		cout<<a[m]<<endl;
	}
 }