http://acm.sdut.edu.cn/sdutoj/problem.php?action=showproblem&problemid=2154 Shopping Time Limit: 1000ms   Memory limit: 65536K  有疑问?点这里^_^ 题目描述 Saya and Kudo go shopping together.You can assume the street as a straight line, while the shops are some…

Shopping Time Limit: 1000MS Memory limit: 65536K 题目描述 Saya and Kudo go shopping together.You can assume the street as a straight line, while the shops are some points on the line.They park their car at the leftmost shop, visit all the shops from left…

Shopping Time Limit: 1000MS Memory limit: 65536K 题目描述 Saya and Kudo go shopping together.You can assume the street as a straight line, while the shops are some points on the line.They park their car at the leftmost shop, visit all the shops from left…

2154: Crash的数字表格 Time Limit: 20 Sec  Memory Limit: 259 MBSubmit: 2924  Solved: 1091[Submit][Status][Discuss] Description 今天的数学课上,Crash小朋友学习了最小公倍数(Least Common Multiple).对于两个正整数a和b,LCM(a, b)表示能同时被a和b整除的最小正整数.例如,LCM(6, 8) = 24.回到家后,Crash还在想着课上学的东西,为了研究…

http://www.lydsy.com/JudgeOnline/problem.php?id=2154 题意:求$\sum_{i=1}^{n} \sum_{j=1}^{m} lcm(i, j)$, $n,m<=1e7$ #include <bits/stdc++.h> using namespace std; typedef long long ll; const int N=1e7+10, MD=20101009; int p[N], pcnt, n, m; bool np[N];…

http://acm.sdut.edu.cn/sdutoj/problem.php?action=showproblem&problemid=2151 Phone Number Time Limit: 1000ms   Memory limit: 65536K  有疑问?点这里^_^ 题目描述 We know that if a phone number A is another phone number B’s prefix, B is not able to be called. For a…

http://acm.sdut.edu.cn/sdutoj/problem.php?action=showproblem&problemid=2610 Boring Counting Time Limit: 3000ms   Memory limit: 65536K  有疑问?点这里^_^ 题目描述     In this problem you are given a number sequence P consisting of N integer and Pi is the ith ele…

http://acm.sdut.edu.cn/sdutoj/problem.php?action=showproblem&problemid=2609 A-Number and B-Number Time Limit: 1000ms   Memory limit: 65536K  有疑问?点这里^_^ 题目描述 Tom is very interested in number problem. Nowadays he is thinking of a problem about A-number…

http://acm.sdut.edu.cn/sdutoj/problem.php?action=showproblem&problemid=2624 Contest Print Server Time Limit: 1000ms   Memory limit: 65536K  有疑问?点这里^_^ 题目描述     In ACM/ICPC on-site contests ,3 students share 1 computer,so you can print your source cod…

http://acm.sdut.edu.cn/sdutoj/problem.php?action=showproblem&problemid=2608 Alice and Bob Time Limit: 1000ms   Memory limit: 65536K  有疑问?点这里^_^ 题目描述 Alice and Bob like playing games very much.Today, they introduce a new game. There is a polynomial li…