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LeetCode刷题，代码均是本地跑过并在LeetCode提交通过。
算法的思维方式是集思广益，有来自鄙人自己的想法，也有摘自其他人的想法。
更新代码，一则为他人提供思路，二则敦促自己学习。
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不积跬步，无以至千里！
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33. Search in Rotated Sorted Array【搜索旋转排序数组】
package LeetCode;public class Test { public static void main(String[] args) { int[] nums1 = {4,5,6,7,0,1,2}; int target1 = 3; System.out.println(search(nu...原创 2019-08-09 13:53:21 · 258 阅读 · 0 评论 -
31. Next Permutation【下一个排列】
https://leetcode-cn.com/problems/next-permutation/solution/xia-yi-ge-pai-lie-by-leetcode/package LeetCode;public class Test { public static void main(String[] args) { int[] nums1 = {1,2,3}; ...原创 2019-08-01 20:20:04 · 257 阅读 · 0 评论 -
35. Search Insert Position【搜索插入位置】
package LeetCode;public class Test { public static void main(String[] args) { int[] nums1 = {1,3,5,6}; int target1 = 5; int target2 = 2; int tar...原创 2019-07-31 18:23:33 · 162 阅读 · 0 评论 -
29. Divide Two Integers【递归+位运算】
refer: https://leetcode.com/problems/divide-two-integers/package LeetCode;public class Test { public static void main(String[] args) { System.out.println(Integer.MIN_VALUE >> 1); System...原创 2019-07-31 17:53:48 · 270 阅读 · 0 评论 -
28. Implement strStr()【实现strStr()】
package LeetCode;public class Test { public static void main(String[] args) { String haystack1 = "hello"; String needle1 = "ll"; System.out.println(strStr(haystack1, needle1)); String h...原创 2019-07-30 19:07:35 · 187 阅读 · 0 评论 -
27. Remove Element【移除元素】
package LeetCode;public class Test { public static void main(String[] args) { int[] nums1 = {3,2,2,3}; for (int i = 0; i < nums1.length; i++) { System.out.print(nums1[i] + "\t"); }...原创 2019-07-30 17:00:14 · 315 阅读 · 0 评论 -
26. Remove Duplicates from Sorted Array【删除排序数组中的重复项】
package LeetCode;public class Test { public static void main(String[] args) { int[] nums1 = {1,1,2}; System.out.println(removeDuplicates(nums1)); int[] nums2 = {0,0,1,1,1,2,2,3,3,4}; S...原创 2019-07-30 16:16:07 · 217 阅读 · 0 评论 -
24. Swap Nodes in Pairs【两两交换链表中的节点】
package LeetCode;public class Test { public static void main(String[] args) { ListNode l1 = new ListNode(1); ListNode l2 = new ListNode(2); ListNode l3 = new ListNode(3); ListNode l4 = ...原创 2019-07-30 15:56:31 · 153 阅读 · 0 评论 -
22.Generate Parentheses【括号生成】
Refer: https://leetcode-cn.com/problems/generate-parentheses/solution/java-di-gui-qiu-jie-by-ssimz/目前尚未弄明白，代码在本地调试通过。package LeetCode;import java.util.ArrayList;import java.util.List;public ...原创 2019-07-29 16:32:05 · 201 阅读 · 0 评论 -
21. Merge Two Sorted Lists【合并两个有序链表】
Refer: https://leetcode-cn.com/problems/merge-two-sorted-lists/solution/he-bing-liang-ge-you-xu-lian-biao-by-leetcode public ListNode mergeTwoLists(ListNode l1, ListNode l2) { if (l1 == nu...原创 2019-07-29 09:24:05 · 199 阅读 · 0 评论 -
20. Valid Parentheses【有效括号】
package LeetCode;import java.util.ArrayList;public class Test { public static void main(String[] args) { System.out.println(isValid("()")?1:0); System.out.println(isV...原创 2019-07-28 23:32:15 · 191 阅读 · 0 评论 -
19. Remove Nth Node From End of List
Question DescriptionMy Keypackage LeetCode;class ListNode { int val; ListNode next; ListNode(int x) { val = x; }}public class Test { public static void main...原创 2019-07-28 16:09:34 · 176 阅读 · 0 评论 -
18. 4Sum
Question DescriptionMy Keyimport java.util.ArrayList;import java.util.Arrays;import java.util.List;public class Test { public static void main(String[] args) { } public static Lis...原创 2019-07-28 16:08:19 · 260 阅读 · 0 评论 -
17. Letter Combinations of a Phone Number
Question DescriptionMy Keypackage LeetCode;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;public class Test { public static void main(Str...原创 2019-07-28 16:07:05 · 348 阅读 · 0 评论 -
16. 3Sum Closest
Question DescriptionMy Keypackage LeetCode;import java.util.Arrays;public class Test { public static void main(String[] args) { int[] a = {-1, 2, 1, -4}; System.out...原创 2019-07-28 16:05:33 · 154 阅读 · 0 评论 -
15. 3Sum
Question DescriptionMy Keypackage LeetCode;import java.util.ArrayList;import java.util.Arrays;import java.util.List;public class Test { public static void main(String[] args) { ...原创 2019-07-28 16:04:29 · 195 阅读 · 0 评论 -
14. Longest Common Prefix
Question DescriptionMy Keypackage LeetCode;public class Test { public static void main(String[] args) { String[] str1 = {"flower","flow","flight"}; System.ou...原创 2019-07-28 16:03:02 · 154 阅读 · 0 评论 -
13. Roman to Integer
Question DescriptionMy Keypackage LeetCode;import java.util.HashMap;import java.util.Map;public class Test { public static void main(String[] args) { System.out.printl...原创 2019-07-28 16:01:18 · 190 阅读 · 0 评论 -
12. Integer to Roman
Question DescriptionMy Keypackage LeetCode;public class Test { public static void main(String[] args) { System.out.println(intToRoman(111)); } public static...原创 2019-07-28 15:59:02 · 179 阅读 · 0 评论 -
11. Container With Most Water
Question DescriptionMy Keypackage LeetCode;public class Test { public static void main(String[] args) { int[] num = {1,8,6,2,5,4,8,3,7}; ...原创 2019-07-28 15:56:44 · 161 阅读 · 0 评论 -
9. Palindrome Number
Question DescriptionMy Keypackage LeetCode;public class Test { public static void main(String[] args) { System.out.println(isPalindrome(121)?1:0); } pub...原创 2019-07-28 15:54:34 · 171 阅读 · 0 评论 -
8. String to Integer (atoi)
Question DescriptionMy Keypackage LeetCode;public class Test { public static void main(String[] args) { System.out.println(myAtoi("+12345")); System.out.pr...原创 2019-07-28 15:52:32 · 144 阅读 · 0 评论 -
7. Reverse Integer
Question DescriptionMy Key public static int reverse(int x) { int rev = 0; while (x != 0) { int pop = x % 10; x /= 10; ...原创 2019-07-28 15:49:24 · 144 阅读 · 0 评论 -
6. ZigZag Conversion
Question DescriptionMy Keypackage LeetCode;public class Test { public static void main(String[] args) { System.out.println(convert("PAYPALISHIRING", 3)); } pu...原创 2019-07-28 15:47:08 · 153 阅读 · 0 评论 -
5. Longest Palindromic Substring
Question DescriptionMy Keypackage LeetCode;public class Test { private static int index; private static int len; public static void main(String[] args) { ...原创 2019-07-28 15:44:51 · 136 阅读 · 0 评论 -
3. Longest Substring Without Repeating Characters
Question DescriptionMy Keypackage Three_LongestSubstring;import java.util.HashSet;import java.util.Set;public class LongestSubstring_key { public static void main(String[] args) { ...原创 2019-07-28 15:41:02 · 129 阅读 · 0 评论 -
2. Add Two Numbers
Question DescriptionMy Keypackage AddTwoNumbers;import java.util.Scanner;public class ListNodeMain { private static Scanner sc; public static void main(String[] args) { Sys...原创 2019-07-28 15:38:03 · 154 阅读 · 0 评论 -
1. Two Sum
Question DescriptionMy Keypackage TwoSum;import java.util.HashMap;import java.util.Iterator;import java.util.Map;public class TwoSumMain { public static void main(String args[]) { ...原创 2019-07-28 15:32:50 · 133 阅读 · 0 评论