B - Tour Time Limit:1000MS     Memory Limit:65536KB     64bit IO Format:%I64d & %I64u Description John Doe, a skilled pilot, enjoys traveling. While on vacation, he rents a small plane and starts visiting beautiful places. To save money, John must de…

Gears Time Limit: 2000ms Memory Limit: 65536KB This problem will be judged on ZJU. Original ID: 378964-bit integer IO format: %lld      Java class name: Main   Bob has N (1 ≤ N ≤ 2*105) gears (numbered from 1 to N). Each gear can rotate clockwise or…

The Child and Homework Time Limit: 1000ms Memory Limit: 262144KB This problem will be judged on CodeForces. Original ID: 437A64-bit integer IO format: %I64d      Java class name: (Any)       Once upon a time a child got a test consisting of multiple-…

In 7-bit Time Limit: 2000ms Memory Limit: 65536KB This problem will be judged on ZJU. Original ID: 371364-bit integer IO format: %lld      Java class name: Main   Very often, especially in programming contests, we treat a sequence of non-whitespace c…

Moving Tables Time Limit: 2000ms Memory Limit: 65536KB This problem will be judged on ZJU. Original ID: 102964-bit integer IO format: %lld      Java class name: Main   The famous ACM (Advanced Computer Maker) Company has rented a floor of a building…

Multiplication Puzzle Time Limit: 1000ms Memory Limit: 65536KB This problem will be judged on PKU. Original ID: 165164-bit integer IO format: %lld      Java class name: Main     The multiplication puzzle is played with a row of cards, each containing…

A - Dividing Time Limit:1000MS     Memory Limit:10000KB     64bit IO Format:%I64d & %I64u Description Marsha and Bill own a collection of marbles. They want to split the collection among themselves so that both receive an equal share of the marbles.…

Copied From:http://www.math.uwaterloo.ca/tsp/uk/index.html Shortest possible tour to nearly every pub in the United Kingdom. Line drawing of the optimal route. Click. Previous Next Click for an image of the full tour, or here for a high-resolution im…

A Gentle Guide to Machine Learning Machine Learning is a subfield within Artificial Intelligence that builds algorithms that allow computers to learn to perform tasks from data instead of being explicitly programmed. Got it? We can make machines lear…

我们的函数是有high bias problem(underfitting problem)还是 high variance problem(overfitting problem),区分它们很得要,因为有助于我们提升我们的预测准确性. bias problem(underfitting problem)/variance problem(overfitting problem) Training error & validation/test error 随着d的不同而变化的函数 从图中可以看…

Link http://acm.hust.edu.cn/vjudge/contest/121539#problem/C Description standard input/output After a long ACM training day, Master Hasan invited his trainees for a light dinner in the cafeteria. The cafeteria has N tables, each with a number of chai…

任意门:http://acm.hdu.edu.cn/showproblem.php?pid=6341 Problem J. Let Sudoku Rotate Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 262144/262144 K (Java/Others)Total Submission(s): 1363    Accepted Submission(s): 717 Problem Description Sudoku i…

任意门:http://acm.hdu.edu.cn/showproblem.php?pid=6342 Problem K. Expression in Memories Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 262144/262144 K (Java/Others)Total Submission(s): 2150    Accepted Submission(s): 772Special Judge Problem De…

任意门:http://acm.hdu.edu.cn/showproblem.php?pid=6336 Problem E. Matrix from Arrays Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 262144/262144 K (Java/Others)Total Submission(s): 1711    Accepted Submission(s): 794 Problem Description Kazari…

传送门:http://acm.hdu.edu.cn/showproblem.php?pid=6343 Problem L. Graph Theory Homework Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 262144/262144 K (Java/Others)Total Submission(s): 1536    Accepted Submission(s): 830 Problem Description Ther…

任意门:http://acm.hdu.edu.cn/showproblem.php?pid=6333 Problem B. Harvest of Apples Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 262144/262144 K (Java/Others)Total Submission(s): 4043    Accepted Submission(s): 1560 Problem Description There a…

传送门:http://acm.hdu.edu.cn/showproblem.php?pid=6324 Problem F. Grab The Tree Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 524288/524288 K (Java/Others)Total Submission(s): 1234    Accepted Submission(s): 779 Problem Description Little Q and…

任意门:http://acm.hdu.edu.cn/showproblem.php?pid=6319 Problem A. Ascending Rating Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 524288/524288 K (Java/Others)Total Submission(s): 5943    Accepted Submission(s): 2004 Problem Description Before…

2018 Multi-University Training Contest 4 6333.Problem B. Harvest of Apples 题意很好懂,就是组合数求和. 官方题解: 我来叨叨一些东西. 这题肯定不能一个一个遍历求和,这样就上天了... 解释一下官方题解的意思. 为什么 sum(n,m)=2*sum(n-1,m)-c(n-1,m). 因为c(n,m)=c(n-1,m)+c(n-1,m-1),至于为什么成立,不懂的百度一下组合数和杨辉三角吧... sum(n,m)=c(n,…

2018 Multi-University Training Contest 3 6319.Problem A. Ascending Rating 题意就是给你长度为k的数列,如果数列长度k<n,就利用一个构造数列的方法构造数列使数列长度为n. 然后求定长区间为m的数列中最大值是几,最大值是第几次更新maxnum得到的,得到所有结果之后,用一个求和的公式将结果输出来,具体题意自己翻译. 滑窗问题,单调队列可以解决.关于滑窗问题和单调队列,具体的自行百度. 对于这个题,倒着遍历数列才能既找到最大值…

Hotaru's problem Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 907    Accepted Submission(s): 322 Problem Description Hotaru Ichijou recently is addicated to math problems. Now she is playing…

The shortest problem Time Limit: 3000/1500 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 346    Accepted Submission(s): 167 Problem Description In this problem, we should solve an interesting game. At first, we hav…

Annoying problem Time Limit: 16000/8000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 1006    Accepted Submission(s): 330 Problem Description Coco has a tree, whose nodes are conveniently labeled by 1,2,…,n, which…

MZL's simple problem Time Limit: 3000/1500 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 740    Accepted Submission(s): 357 Problem Description A simple problemProblem DescriptionYou have a multiple set,and now the…

Solve this interesting problem Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 1479    Accepted Submission(s): 423 Problem Description Have you learned something about segment tree? If not, don’…

2019 Multi-University Training Contest 2: 1010 Just Skip The Problem 自闭记 题意 多测.每次给你一个数\(n\),你可以同时问无数次,每次问的是一个数\(y_i\),你会得到的回答是\(x\&y_i\)是否为\(y_i\),问你问的最少的次数的种数\(\%1e6+3\),可以调换顺序 10min 得出数学方法 求\(n!\%1e6+3\). 50min 自闭 5min 写出裸暴力,优化10min,交一发TLE 30min 网上…

Link http://acm.hust.edu.cn/vjudge/contest/121539#problem/B Description standard input/output Although Haneen was able to solve the LCS problem, Dr. Ibrahim is suspicious about whether she really understands the LCS problem or not. He believes that s…

Link http://acm.hust.edu.cn/vjudge/contest/121539#problem/A Description standard input/output Haneen is trying to solve an easy problem given by Dr. Ibrahim in the Algorithms course. The problem is to find the lexicographically smallest Longest Commo…

Problem Management Problem management seeks to identify the underlying causes of incidents in an IT infrastructure and to remove those causes. The problem management process addresses the causes of incidents reactively and proactively. Reactive probl…

Annoying problem Problem's Link: http://acm.hdu.edu.cn/showproblem.php?pid=5296 Mean: 给你一个有根树和一个节点集合S,初始S为空,有q个操作,每个操作要么从树中选一个结点加入到S中(不删除树中节点),要么从S集合中删除一个结点.你需要从树中选一些边组成集合E,E中的边能够是S中的节点连通.对于每一个操作,输出操作后E中所有边的边权之和. analyse: 首先是构图,把树看作一个无向图,使用邻接表存图. 处理出…