mirror of
https://github.com/krahets/hello-algo.git
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e720aa2d24
* Sync recent changes to the revised Word. * Revised the preface chapter * Revised the introduction chapter * Revised the computation complexity chapter * Revised the chapter data structure * Revised the chapter array and linked list * Revised the chapter stack and queue * Revised the chapter hashing * Revised the chapter tree * Revised the chapter heap * Revised the chapter graph * Revised the chapter searching * Reivised the sorting chapter * Revised the divide and conquer chapter * Revised the chapter backtacking * Revised the DP chapter * Revised the greedy chapter * Revised the appendix chapter * Revised the preface chapter doubly * Revised the figures
40 lines
999 B
Go
40 lines
999 B
Go
// File: hanota.go
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// Created Time: 2023-07-21
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// Author: hongyun-robot (1836017030@qq.com)
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package chapter_divide_and_conquer
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import "container/list"
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/* 移动一个圆盘 */
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func move(src, tar *list.List) {
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// 从 src 顶部拿出一个圆盘
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pan := src.Back()
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// 将圆盘放入 tar 顶部
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tar.PushBack(pan.Value)
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// 移除 src 顶部圆盘
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src.Remove(pan)
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}
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/* 求解汉诺塔问题 f(i) */
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func dfsHanota(i int, src, buf, tar *list.List) {
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// 若 src 只剩下一个圆盘，则直接将其移到 tar
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if i == 1 {
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move(src, tar)
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return
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}
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// 子问题 f(i-1) ：将 src 顶部 i-1 个圆盘借助 tar 移到 buf
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dfsHanota(i-1, src, tar, buf)
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// 子问题 f(1) ：将 src 剩余一个圆盘移到 tar
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move(src, tar)
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// 子问题 f(i-1) ：将 buf 顶部 i-1 个圆盘借助 src 移到 tar
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dfsHanota(i-1, buf, src, tar)
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}
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/* 求解汉诺塔问题 */
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func solveHanota(A, B, C *list.List) {
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n := A.Len()
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// 将 A 顶部 n 个圆盘借助 B 移到 C
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dfsHanota(n, A, B, C)
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}
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