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全部文章 / leetcode （共39篇）

[leetcode] python Remove Duplicates from Sorted Array II

problem: Follow up for "Remove Duplicates": What if duplicates are allowed at most twice? For example, Given sorted array A = [1,1,1,2...

2020-07-14

0 386

[leetcode] Search in Rotated Sorted Array Python

Problem: Suppose a sorted array is rotated at some pivot unknown to you beforehand. (i.e., 0 1 2 4 5 6 7 might become 4 5 6 7 0 1 2). You are ...

2020-07-14

0 311

[leetcode]Merge Two Sorted Lists

Merge Two Sorted Lists # Definition for singly-linked list. # class ListNode: # def __init__(self, x): # self.val = x # self.next = None class Solut...

2020-07-14

0 300

[leetcode127]Word Ladder Problem

Word Ladder Problem 问题描述： Given two words (beginWord and endWord), and a dictionary’s word list, find the length of shortest transformation sequence...

2020-07-14

0 383

[leetcode126]word ladder 2

word ladder 2 Given two words (beginWord and endWord), and a dictionary’s word list, find all shortest transformation sequence(s) from beginWord to e...

2020-07-14

0 325

[leetcode284]Peeking Iterator

问题描述： Given an Iterator class interface with methods: next() and hasNext(), design and implement a PeekingIterator that support the peek() operation ...

2020-07-14

0 328

[leetcode54] Spiral Matrix

问题描述： Given a matrix of m x n elements (m rows, n columns), return all elements of the matrix in spiral order. For example, Given the followin...

2020-07-14

0 300

[leetcode64]Minimum Path Sum

问题描述： Given a m x n grid filled with non-negative numbers, find a path from top left to bottom right which minimizes the sum of all numbers along i...

2020-07-14

0 251

[leetcode279] perfect squares

问题描述： Given a positive integer n, find the least number of perfect square numbers (for example, 1, 4, 9, 16, ...) which sum to n. For example, g...

2020-07-14

0 359

[leetcode292]Nim Game

问题描述： You are playing the following Nim Game with your friend: There is a heap of stones on the table, each time one of you take turns to remove 1...

2020-07-14

0 364