hanoi_eu

#include <bits/stdc++.h>

using namespace std;
ifstream fin("hanoi.in");
ofstream fout("hanoi.out");
int n;
unsigned long long nr;
void towerOfHanoi(int n, char from_rod, char to_rod, char aux_rod)
{
    if (n == 1)
    {
        fout<<from_rod<<"->"<<to_rod<<'\n';
        return;
    }
    towerOfHanoi(n-1, from_rod, aux_rod, to_rod);
    fout<<from_rod<<"->"<<to_rod<<'\n';
    towerOfHanoi(n-1, aux_rod, to_rod, from_rod);
}

int main()
{
    fin>>n;
    nr=(1<<n)-1;
    fout<<nr<<'\n';
    towerOfHanoi(n, 'A', 'C', 'B');
    return 0;
}