hd 2085

Posted 2020-06-22

#include <iostream>
#include <cmath>
using namespace std;
typedef long long ll;
//typedef unsigned long long ll;
//const ll inf=9999999999999;
ll a[36];
ll b[36];
int main()
{
    a[0]=1;
    b[0]=0;
    for(int i=1;i<35;i++)
    {
        a[i]=3*a[i-1]+2*b[i-1];
        b[i]=a[i-1]+b[i-1];
    }
    int n;
    while(cin>>n)
    {
        if(n==-1) break;
        cout<<a[n]<<", "<<b[n]<<endl;//dp[n]<<endl;
    }
    return 0;
}