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全部文章 / leetcode （共34篇）

LeetCode 189. 旋转数组

题目描述给定一个数组，将数组中的元素向右移动 k 个位置，其中 k 是非负数。输入: [1,2,3,4,5,6,7] 和 k = 3 输出: [5,6,7,1,2,3,4] 解释: 向右旋转 1 步: [7,1,2,3,4,5,6] 向右旋转 2 步: [6,7,1,2,3,4,5] 向右旋...

2018-08-14

0 431

15. 3Sum

题目描述 Given an array S of n integers, are there elements a, b, c in S such that a + b + c = 0? Find all unique triplets in the array which gives the s...

2017-07-31

0 370

16. 3Sum Closest

题目描述 Given an array S of n integers, find three integers in S such that the sum is closest to a given number, target. Return the sum of the three int...

2017-07-31

0 349

88. Merge Sorted Array

题目描述 Given two sorted integer arrays nums1 and nums2, merge nums2 into nums1 as one sorted array. Note: You may assume that nums1 has enough space ...

2017-07-28

0 380

119. Pascal's Triangle II

题目描述 Given an index k, return the kth row of the Pascal’s triangle. For example, given k = 3, Return [1,3,3,1]. 思路得到第k+1行的一整列的值。解法1得到前k+1行的值，将最...

2017-07-26

0 560

118. Pascal's Triangle

题目描述 Given numRows, generate the first numRows of Pascal’s triangle. For example, given numRows = 5, Return [ [1], [1,1], [1,2,1], [...

2017-07-26

0 416

66. Plus One

题目描述 Given a non-negative integer represented as a non-empty array of digits, plus one to the integer. You may assume the integer do not contain any...

2017-06-25

0 444

80. Remove Duplicates from Sorted Array II

题目描述 Follow up for “Remove Duplicates”: What if duplicates are allowed at most twice? For example, Given sorted array nums = [1,1,1,2,2,3], Your ...

2017-06-23

0 378

26. Remove Duplicates from Sorted Array

题目描述 Given a sorted array, remove the duplicates in place such that each element appear only once and return the new length. Do not allocate extra s...

2017-06-22

0 387

27. Remove Element

题目描述 Given an array and a value, remove all instances of that value in place and return the new length. Do not allocate extra space for another arra...

2017-06-22

0 329