随笔分类 - Numbers & Digits
摘要：Given an array nums containing n distinct numbers in the range [0, n], return the only number in the range that is missing from the array. Follow up:
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摘要：Given an integer array nums which is sorted in ascending order and all of its elements are unique and given also an integer k, return the kth missing
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摘要：There are n buildings in a line. You are given an integer array heights of size n that represents the heights of the buildings in the line. The ocean
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摘要：Given an unsorted array of integers nums, return the length of the longest continuous increasing subsequence (i.e. subarray). The subsequence must be
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摘要：Given an array consists of non-negative integers, your task is to count the number of triplets chosen from the array that can make triangles if we tak
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摘要：Given three integer arrays arr1, arr2 and arr3 sorted in strictly increasing order, return a sorted array of only the integers that appeared in all th
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摘要：Given an m x n matrix, return true if the matrix is Toeplitz. Otherwise, return false. A matrix is Toeplitz if every diagonal from top-left to bottom-
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摘要：You are given a sorted array consisting of only integers where every element appears exactly twice, except for one element which appears exactly once.
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摘要：Given an integer array arr. You have to sort the integers in the array in ascending order by the number of 1's in their binary representation and in c
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摘要：Given a binary array, find the maximum length of a contiguous subarray with equal number of 0 and 1. Example 1: Input: [0,1] Output: 2 Explanation: [0
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摘要：Write a function that takes an unsigned integer and returns the number of '1' bits it has (also known as the Hamming weight). Note: Note that in some
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摘要：You are given two arrays (without duplicates) nums1 and nums2 where nums1’s elements are subset of nums2. Find all the next greater numbers for nums1'
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摘要：Given an integer array, you need to find one continuous subarray that if you only sort this subarray in ascending order, then the whole array will be
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摘要：A move consists of taking a point (x, y) and transforming it to either (x, x+y) or (x+y, y). Given a starting point (sx, sy) and a target point (tx, t
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摘要：Median is the middle value in an ordered integer list. If the size of the list is even, there is no middle value. So the median is the mean of the two
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摘要：Your are given an array of positive integers nums. Count and print the number of (contiguous) subarrays where the product of all the elements in the s
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摘要：Given a positive integer N, how many ways can we write it as a sum of consecutive positive integers? Example 1: Example 2: Example 3: 分析：https://leetc
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摘要：Given an array w of positive integers, where w[i] describes the weight of index i, write a function pickIndex which randomly picks an index in proport
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摘要：Suppose you have a random list of people standing in a queue. Each person is described by a pair of integers (h, k), where h is the height of the pers
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摘要：Initially, there is a Robot at position (0, 0). Given a sequence of its moves, judge if this robot makes a circle, which means it moves back to the or
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