摘要： Combination Sum II问题：Given a collection of candidate numbers (C) and a target number (T), find all unique combinations inCwhere the candidate numbers ... 阅读全文

摘要： Combination Sum问题：Given a set of candidate numbers (C) and a target number (T), find all unique combinations inCwhere the candidate numbers sums toT.T... 阅读全文

摘要： Sudoku Solver问题：Write a program to solve a Sudoku puzzle by filling the empty cells.Empty cells are indicated by the character'.'.You may assume that ... 阅读全文

摘要： Valid Sudoku问题：Determine if a Sudoku is valid, according to:Sudoku Puzzles - The Rules.The Sudoku board could be partially filled, where empty cells a... 阅读全文

摘要： Combinations问题：Given two integersnandk, return all possible combinations ofknumbers out of 1 ...n.思路： dfs + 回溯我的代码：public class Solution { public ... 阅读全文

摘要： Generate Parentheses问题：Givennpairs of parentheses, write a function to generate all combinations of well-formed parentheses.For example, givenn= 3, a ... 阅读全文

摘要： Pascal's Triangle II问题：Given an indexk, return thekthrow of the Pascal's triangle.For example, givenk= 3,Return[1,3,3,1].思路： 简单的数学推理即可我的代码：public cla... 阅读全文

摘要： Pascal's Triangle问题：GivennumRows, generate the firstnumRowsof Pascal's triangle.思路： 简单的数学推理我的代码：public class Solution { public List> generate(int ... 阅读全文

摘要： Merge Sorted Array问题：Given two sorted integer arrays A and B, merge B into A as one sorted array.Note:You may assume that A has enough space (size tha... 阅读全文

摘要： Linked List Cycle II问题：Given a linked list, return the node where the cycle begins. If there is no cycle, returnnull.Follow up:Can you solve it withou... 阅读全文