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Given two sorted integer arrays nums1 and nums2, merge nums2 into nums1 as one sorted array. Note: The number of elements initialized in nums1 and num 阅读全文
posted @ 2018-12-02 18:52
fatttcat
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Given a non-negative index k where k ≤ 33, return the kth index row of the Pascal's triangle. Note that the row index starts from 0. In Pascal's trian 阅读全文
posted @ 2018-12-02 18:32
fatttcat
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Given a non-negative integer numRows, generate the first numRows of Pascal's triangle. In Pascal's triangle, each number is the sum of the two numbers 阅读全文
posted @ 2018-12-02 17:30
fatttcat
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Given a non-empty array of digits representing a non-negative integer, plus one to the integer. The digits are stored such that the most significant d 阅读全文
posted @ 2018-12-02 15:46
fatttcat
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Given an array nums, write a function to move all 0's to the end of it while maintaining the relative order of the non-zero elements. Example: Note: 用 阅读全文
posted @ 2018-12-02 15:16
fatttcat
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An array is monotonic if it is either monotone increasing or monotone decreasing. An array A is monotone increasing if for all i <= j, A[i] <= A[j]. A 阅读全文
posted @ 2018-12-02 15:02
fatttcat
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用binary search 如果A[mid] < A[mid+1]，说明peak在mid右侧，l = mid + 1；否则说明peak在mid右侧，r = mid 时间：O(N)，空间：O(1) 阅读全文
posted @ 2018-12-02 12:10
fatttcat
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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
posted @ 2018-12-02 10:02
fatttcat
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Given an array of integers and an integer k, you need to find the total number of continuous subarrays whose sum equals to k. Example 1: Note: 解法：hash 阅读全文
posted @ 2018-12-02 09:56
fatttcat
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Given two sparse matrices A and B, return the result of AB. You may assume that A's column number is equal to B's row number. Example: Input: A = [ [ 阅读全文
posted @ 2018-12-02 04:53
fatttcat
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