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[leetcode]_Add Two Numbers
题目:两个链表存储数字,然后求和,和值存储在一个链表中。代码: 1 public ListNode addTwoNumbers(ListNode l1, ListNode l2) { 2 ListNode head = new ListNode(0); 3 ListN...
分类:其他好文   时间:2014-06-29 15:15:57    阅读次数:240
LeetCode:Swap Nodes in Pairs
Given a linked list, swap every two adjacent nodes and return its head. For example, Given 1->2->3->4, you should return the list as 2->1->4->3. Your ...
分类:其他好文   时间:2014-06-29 14:39:10    阅读次数:268
LeetCode Length of Last Word
class Solution {public: int lengthOfLastWord(const char *s) { if (s == NULL) return 0; int mlen = 0, len = 0; bool inword = fa...
分类:其他好文   时间:2014-06-29 14:13:37    阅读次数:229
LeetCode Permutations II
class Solution { public: vector > permuteUnique(vector &num) { vector > result; if (num.size() path; dfs(n...
分类:其他好文   时间:2014-06-29 14:09:34    阅读次数:220
Leetcode Letter Combinations of a Phone Number
const char* lookup[] = {" ", "", "abc", "def", "ghi", "jkl", "mno", "pqrs", "tuv", "wxy...
分类:其他好文   时间:2014-06-07 05:04:11    阅读次数:192
Leetcode Add Two Numbers
class Solution {public: ListNode *addTwoNumbers(ListNode *l1, ListNode *l2) { ListNode* p = l1; ListNode* q = l2; ListNode* re...
分类:其他好文   时间:2014-06-07 03:50:49    阅读次数:218
LeetCode Spiral Matrix
class Solution { public: vector spiralOrder(vector > &matrix) { vector ret; int cols = 0; ...
分类:其他好文   时间:2014-05-28 14:38:02    阅读次数:236
[Java]_函数传参的疑惑与思考
问题来源于leetcode上的两道题 Path Sum I && II,分别写了两个dfs。1 void dfs(TreeNode node , int sum , ArrayList curPath)2 void dfs(TreeNode node , int sum , boolean ifEx...
分类:编程语言   时间:2014-05-28 13:11:14    阅读次数:361
[leetcode]_Sum Root to Leaf Numbers
题目:计算一棵二叉树所有路径组成的数的总和。思考:也是DFS的基础应用。虽然还是套着别人的DFS框架写的,但是学习通常会经历先模拟,再创新的过程。代码: 1 private int sum = 0; 2 public int sumNumbers(TreeNode root) { 3...
分类:其他好文   时间:2014-05-28 11:13:01    阅读次数:225
LeetCode Spiral Matrix II
class Solution { public: vector > generateMatrix(int n) { vector > matrix; if (n (n, 0)); }...
分类:其他好文   时间:2014-05-28 09:42:14    阅读次数:233
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