上题运行错误，请重写

```python def hanoi(n, source, target, auxiliary, moves): if n == 1: moves.append(f"{source}->{n}->{target}") else: hanoi(n - 1, source, auxiliary, target, moves) moves.append(f"{source}->{n}->{target}") hanoi(n - 1, auxiliary, target, source, moves) def main(): N = int(input().strip()) moves = [] hanoi(N, 'a', 'c', 'b', moves) print(2N - 1) for move in moves: print(move) if __name__ == "__main__": main() ``` [2026-01-06 12:33:50 | AI问答 | 152点数解答]