#include <stdio.h>
 
void moveOneDisk(int from, int to) {
    printf("杭%dから杭%dに移動\n", from, to);
}
 
void moveDisks(int from, int to, int n) {
    if (n == 1) {
        moveOneDisk(from, to);
    } else {
        int anotherPole = 6 - (from + to); // 1+2+3=6 を利用
        moveDisks(from, anotherPole, n - 1);  // 上からn-1枚を別の杭へ
        moveOneDisk(from, to);               // 一番下の円盤を目的地へ
        moveDisks(anotherPole, to, n - 1);   // 別の杭にあるn-1枚を目的地へ
    }
}
 
int main(void) {
    int n = 5;
    printf("%d枚の円盤を杭1から杭3に移動させる手順は以下のとおり:\n", n);
    moveDisks(1, 3, n);
    return 0;
}
 

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