Question

Write the java code that will convert the given Before links to the After links with...

Write the java code that will convert the given Before links to the After links with comments.

For example:

Before:

           +----+----+    +----+----+

list ----> | 1 | +----> | 2 | / |

           +----+----+    +----+----+

After:

           +----+----+    +----+----+    +----+----+

list ----> | 1 | +----> | 2 | +----> | 3 | / |

           +----+----+    +----+----+    +----+----+

Code: (example answer)

list.next.next = new ListNode(3, null);   // 2 -> 3

(1)

Before:

           +----+----+    +----+----+

list ----> | 1 | +----> | 2 | / |

           +----+----+    +----+----+

After:

           +----+----+    +----+----+    +----+----+

list ----> | 3 | +----> | 1 | +----> | 2 | / |

           +----+----+    +----+----+    +----+----+

Code:

-----------------------------------------------------------------

(2)

Before:

           +----+----+    +----+----+

list ----> | 1 | +----> | 2 | / |

           +----+----+    +----+----+

           +----+----+    +----+----+

temp ----> | 3 | +----> | 4 | / |

           +----+----+    +----+----+

After:

           +----+----+    +----+----+    +----+----+    +----+----+

list ----> | 1 | +----> | 3 | +----> | 4 | +- --> | 2 | /

           +----+----+    +----+----+    +----+----+    +----+----+

Code:

-----------------------------------------------------------------

(3)

Before

           +----+----+    +----+----+    +----+----+

list ----> | 1 | +----> | 2 | +----> | 3 | / |

           +----+----+    +----+----+    +----+----+

After:

           +----+----+

list ----> | 2 | / |

           +----+----+

           +----+----+    +----+----+

List2 ---> | 1 | +----> | 3 | / |

           +----+----+    +----+----+

Code:

​​​​​​​-----------------------------------------------------------------

(4)

Before

           +----+----+    +----+----+    +----+----+

list ----> | 5 | +----> | 4 | +----> | 3 | / |

           +----+----+    +----+----+    +----+----+

After:

           +----+----+    +----+----+    +----+----+

list ----> | 3 | +----> | 4 | +----> | 5 | / |

           +----+----+    +----+----+    +----+----+

Code:

​​​​​​​​​​​​​​-----------------------------------------------------------------

(5)

Before:

           +----+----+

list ----> | 1 | / |

           +----+----+

           +----+----+    +----+----+    +----+----+

list2 ---> | 2 | +----> | 3 | +----> | 4 | / |

           +----+----+    +----+----+    +----+----+

After:

           +----+----+    +----+----+    +----+----+

list2 ---> | 4 | +----> | 1 | +----> | 2 | / |

           +----+----+    +----+----+    +----+----+

           +----+----+

List2 ---> | 3 | / |

           +----+----+

Code:

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Homework Answers

Answer #1

1)

list = new ListNode(3, list);

2)

temp->next->next = list->next;

list->next = temp;

3)

ListNode* list2 = list;

list = list->next;

list2->next = list2->next->next;

list->next = NULL;

4)

ListNode* t = list->next->next;

t->next = list->next;

list->next->next = list;

list->next->next->next = NULL;

list = t

5)

list->next->next->next = list;

list = list->next->next;

ListNode* list2 = list->next->next;

list->next->next = NULL;

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