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MathProblem 34 Drug test problem

10% of the people in a certain population use an illegal drug. A drug test yields the correct result 90% of the time, whether the person uses drugs or not. A random person is forced to take the drug test and the result is positive. What is the probability

LeetCode 1567. Maximum Length of Subarray With Positive Product

原题链接在这里：https://leetcode.com/problems/maximum-length-of-subarray-with-positive-product/ 题目： Given an array of integers nums, find the maximum length of a subarray where the product of all its elements is positive. A subarray of an array is a consecuti

1103. Integer Factorization (30)-PAT甲级真题（dfs深度优先）

The K-P factorization of a positive integer N is to write N as the sum of the P-th power of K positive integers. You are supposed to write a program to find the K-P factorization of N for any positive integers N, K and P. Input Specification: Each input f

对比学习量化评价

在超球面上通过对齐和一致实现理解对比表示学习 —— 论文阅读笔记两个对比损失最关键的要素：正例对特征的对齐（就是找最接近的正例对）。超球面特征分布的均匀分布（可以保存最多的信息 torch 版本代码： # bsz : batch size (number of positive pairs) # d : latent dim # x : Te

人脸识别中的损失函数

本文主要是针对人脸识别中的各种loss进行总结。背景对于分类问题，我们常用的loss function是softmax，表示为： ,当然有softmax肯定也有hardmax: ，softmax和hardmax相比，优势是更容易收敛，更容易达到one-hot。softmax鼓励特征分开，但是并不鼓励分的很开，对于人脸识别来说我们需要类

题解1039：判断数正负一本通

1039：判断数正负时间限制: 1000 ms 内存限制: 65536 KB提交数: 125647 通过数: 63815 【题目描述】给定一个整数NN，判断其正负。如果N>0，输出positive；如果N=0N=0，输出zero；如果N<0，输出negative。【输入】一个整数N(−109≤N≤109)。【输出】如果N>0,

ybt 1039:判断数正负

1039：判断数正负时间限制: 1000 ms 内存限制: 65536 KB 提交数: 124306 通过数: 63143 【题目描述】给定一个整数NN，判断其正负。如果N>0N>0，输出positive；如果N=0N=0，输出zero；如果N<0N<0，输出negative。【输入】一个整数N(−109≤N≤109)N(−109≤N≤109)。

1539. Kth Missing Positive Number

My first binary search solution: class Solution { public int findKthPositive(int[] arr, int k) { int l=0, r = arr.length-1; while(l+1<r){ int mid = (l+r)/2; if(arr[mid]-mid-1>=k) r=mid;

Let k be a positive constant. Which of the following is a logistic differential equation?

Let k be a positive constant. Which of the following is a logistic differential equation?(A) dy/dt=kt(B) dy/dt=ky(C) dy/dt=kt(1 -t)(D) dy/dt=ky(1-t) (E) dy/dt=ky(1-y) Please show details. Suppose that y(t) describes the quantity of a population at time t.

3.1 Real Symmetric Matrices and Positive Definiteness 阅读笔记

实对称矩阵与正定性 reference的内容为唯一教程, 接下来的内容仅为本人的课后感悟, 对他人或无法起到任何指导作用. Reference Course website: Symmetric Matrices and Positive Definiteness | Linear Algebra | Mathematics | MIT OpenCourseWare Course video: 【完整版-麻

【双指针】977. 有序数组的平方

题目给你一个按非递减顺序排序的整数数组 nums，返回每个数字的平方组成的新数组，要求也按非递减顺序排序。示例 1：输入：nums = [-4,-1,0,3,10] 输出：[0,1,9,16,100] 解释：平方后，数组变为 [16,1,0,9,100] 排序后，数组变为 [0,1,9,16,100] 示例 2：输入：nums = [-7,-3,2,3,11

Duplicate Number（NOIOPJENGLISH19）

Duplicate Number https://acs.jxnu.edu.cn/problem/NOIOPJENGLISH19 1000ms 65536K 描述： Given a sequence of N numbers, find a number A that the count of A in the sequence is at least two. 给出一列有n个数，找到数字a，a的数量在序列里倒数第二输入： First line: one posi

Sum is K（翻译）

http://noi.openjudge.cn/english/15/ 描述 Given a sequence of N numbers. Find different numbers A and B in the sequence so that the sum of A and B equals to K. 输入 First line: two positive integers N (N <= 1000) and K (K <= 1000000). Second line: N posi

Children‘s Apples（http://noi.openjudge.cn/english/14/）

原文：描述 There are N children. Each child has a positive number, and the numbers are different from each other. Given the sum of all numbers of children. Find a possible assignment. 输入 Two positive integers N (N <= 10) and the sum (sum <= 10000). 输出 O

正定矩阵（Positive Definite Matrices）、半正定矩阵（Positive Semidefinite Matrices）

正定矩阵、半正定矩阵 1.正定矩阵、半正定矩阵1.1 正定矩阵1.1.1 判断正定矩阵 1.2 半正定矩阵1.2.1 判定半正定矩阵 1.3 椭圆 a x

CF1130A Be Positive题解

题意：题目看起来要暴力但是还有一种更简单的方法。正数大于一半就输出 1 1 1 ，负数大于一半就输出 − 1

1.26翻译

OpenJudge - 04:0/1 Knapsack 04:0/1 Knapsack 查看提交统计提问总时间限制: 1000ms 内存限制: 65536kB 描述 Given the weights and values of N items, put a subset of items into a knapsack of capacity C to get the maximum total value in the knapsack. The tota

1.26(Least Common Multiple)

描述： Given A and B. Find the least positive M which is a common multiple of both A and B. 输入： Two positive integers A and B (A,B <= 10000). 输出： One integer M. 样例输入： 8 12 样例输出： 24 翻译: 描述: 给数字A和B，求出a和B的公倍数的最小正整数M。输入：两个正整数A

英文翻译9

OpenJudge - 09:Least Common Multiple 描述 Given A and B. Find the least positive M which is a common multiple of both A and B. 输入 Two positive integers A and B (A,B <= 10000). 输出 One integer M. 翻译：给出A和B，找到A和B的最小公倍数。输入：两个正整数A和B 输

1.22翻译

OpenJudge - 40:Distinct 40:Distinct 总时间限制: 1000ms 内存限制: 65536kB 描述 Select some of N values. The selected values are all different and the number of the selected values is maximum. 从N个值中选择一些值。这些被选择的值都不相同，并且选择的值的数量最多

974. 和可被 K 整除的子数组

给定一个整数数组 A，返回其中元素之和可被 K 整除的（连续、非空）子数组的数目。来源：力扣（LeetCode）链接：https://leetcode-cn.com/problems/subarray-sums-divisible-by-k 著作权归领扣网络所有。商业转载请联系官方授权，非商业转载请注明出处。数组 class Solution { public int

Sum is K

描述： Given a sequence of N numbers. Find different numbers A and B in the sequence so that the sum of A and B equals to K. 输入： First line: two positive integers N (N <= 1000) and K (K <= 1000000). Second line: N positive integers (<= 1000000). 输出：

翻译

Sum is K 1000ms 65536K 描述： Given a sequence of N numbers. Find different numbers A and B in the sequence so that the sum of A and B equals to K. 输入： First line: two positive integers N (N <= 1000) and K (K <= 1000000).Second line: N positive inte

英语翻译作业

OpenJudge - 26:The Nearest Number 总时间限制: 1000ms 内存限制: 65536kB 描述 Given a sequence of N number and K. Find the nearest number X in the sequence that the absolute value of (X minus K) is minimum. 给出N个数和数字K。在这N个数中找到一个数X，使得（X-K）的绝

论文研读 —— 5. FaceNet A Unified Embedding for Face Recognition and Clustering (2/3)

文章目录 3. Method3.1. Triplet Loss3.2. Triplet Selection3.3. Deep Convolutional Networks 4. Datasets and Evaluation4.1. Hold-out Test Set4.2. Personal Photos4.3. Academic Datasets 3. Method FaceNet uses a deep convolutional network. We discuss two