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Given an array of integers and an integer k, find out whether there are two distinct indices i and j in the array such that nums[i] = nums[j] and the 阅读全文
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Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in the arr 阅读全文
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Rotate an array of n elements to the right by k steps. For example, with n = 7 and k = 3, the array [1,2,3,4,5,6,7] is rotated to [5,6,7,1,2,3,4]. Not 阅读全文
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Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. You may assume that the 阅读全文
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Given an array of integers that is already sorted in ascending order, find two numbers such that they add up to a specific target number. The function 阅读全文
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Say you have an array for which the ith element is the price of a given stock on day i. Design an algorithm to find the maximum profit. You may comple 阅读全文
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Say you have an array for which the ith element is the price of a given stock on day i. If you were only permitted to complete at most one transaction 阅读全文
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[ [1], [1,1], [1,2,1], [1,3,3,1], [1,4,6,4,1] ] 含义：要求计算杨辉三角第K行的元素，For example, given k = 3,Return [1,3,3,1]. 思路： 同https://www.cnblogs.com/wzj4858/p/76 阅读全文
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Given numRows, generate the first numRows of Pascal's triangle. For example, given numRows = 5,Return [ [1], [1,1], [1,2,1], [1,3,3,1], [1,4,6,4,1] ] 阅读全文
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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 (size tha 阅读全文
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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 leadin 阅读全文
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Find the contiguous subarray within an array (containing at least one number) which has the largest sum. For example, given the array [-2,1,-3,4,-1,2, 阅读全文
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Given a sorted array and a target value, return the index if the target is found. If not, return the index where it would be if it were inserted in or 阅读全文
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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 array, you 阅读全文
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给定一个有序数组，原地删除重复元素，使得每个元素只出现一次，并返回新的长度。不为另一个数组分配额外空间，必须用常量内存做到这一点。 阅读全文
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题目：给定一个整型数组，返回两个数的下标，满足两个数相加为一个特定整数。假定只有一个正确答案 例如： nums = [2, 7, 11, 15], target = 9,因为nums[0] + nums[1] = 2 + 7 = 9,返回[0,1] 思路：如果是只返回两个数，可以将数组排序后，从两边 阅读全文