#include<bits/stdc++.h>
using namespace std;

void move(int n, char start, char goal,char temp){
    if(n >= 1){
        move(n-1,start,temp,goal);
        printf("disk%d from %c to %c \n",n,start,goal);
        move(n-1,temp,goal,start);
    }
}
int main(){
    int n = 5;
    move(n,'a','c','b');
    return 0;
}

//移动需要2的n次-1