原创 Flatten Binary Tree to Linked List
/** * Definition for binary tree * public class TreeNode { * int val; * TreeNode left; * TreeNode righ
2020-02-20 14:34:05
原创 Combination Sum
public class Solution { public ArrayList<Integer> l; public ArrayList<ArrayList<Integer>> l1; public ArrayL
2020-02-20 14:33:47
原创 Distinct Subsequences
public class Solution { public int numDistinct(String S, String T) { // Start typing your Java solution bel
2020-02-20 14:33:47
原创 Combination Sum II
public class Solution { public ArrayList<ArrayList<Integer>> ret; public ArrayList<Integer> cur; public Arr
2020-02-20 14:33:47
原创 4Sum
public class Solution { public ArrayList<ArrayList<Integer>> fourSum(int[] num,int target) { // Start typin
2020-02-20 14:33:47
原创 Jump Game II
public class Solution { public int jump(int[] A) { // Start typing your Java solution below // DO N
2020-02-20 14:33:47
原创 Search a 2D Matrix
public class Solution { public boolean searchMatrix(int[][] matrix, int target) { // Start typing your Java
2020-02-20 14:33:47
原创 Binary Tree Level Order Traversal II
/** * Definition for binary tree * public class TreeNode { * int val; * TreeNode left; * TreeNode righ
2020-02-20 14:33:47
原创 3Sum Closest
import java.util.Arrays; public class Solution { public int min ; public int[] a; public int threeSumClose
2020-02-20 14:33:47
原创 Convert Sorted List to Binary Search Tree
/** * Definition for singly-linked list. * public class ListNode { * int val; * ListNode next; * ListN
2020-02-20 14:33:46
原创 Binary Tree Maximum Path Sum
/** * Definition for binary tree * public class TreeNode { * int val; * TreeNode left; * TreeNode righ
2020-02-20 14:33:46
原创 Pow(x, n)
public class Solution { public double pow(double x, int n) { // Start typing your Java solution below
2020-02-20 14:33:46
原创 Letter Combinations of a Phone Number
import java.util.ArrayList; public class Solution { public int[] count; public char[] letter; ArrayList<St
2020-02-20 14:33:46
原创 少有人走的路：心智成熟的旅程
《心理學研究》前言部分，解釋一般病人尋求心理治療的原因，他們都面臨一個共同的問題-------感覺自己不能夠對付或者改變現狀，因此產生恐懼，無助感和自我懷疑。大多數病人力不從心的根源，在於他們總想逃避自由，不能夠成爲他們的問題，他們生活承
2020-02-20 14:33:46
原创 Minimum Depth of Binary Tree
public class Solution { public int minDepth(TreeNode root) { // Start typing your Java solution below
2020-02-20 14:33:46