B. Math time limit per test:1 second memory limit per test:256 megabytes Description: JATC's math teacher always gives the class some interesting math problems so that they don't get bored. Today the problem is as follows. Given an integer n, you can…
Codeforces Round #297 (Div. 2)C. Ilya and Sticks Time Limit: 2 Sec Memory Limit: 256 MBSubmit: xxx Solved: 2xx 题目连接 http://codeforces.com/contest/525/problem/C Description In the evening, after the contest Ilya was bored, and he really felt like ma…
D. Fun with Integers 题目链接:https://codeforc.es/contest/1062/problem/D 题意: 给定一个n,对于任意2<=|a|,|b|<=n,如果a->b,则存在一个x,使得x*a=b 或者 x*b=a,那么最终答案就是|x|的总和.相同的a,b不能被重复转化. 题解: 哎,这个复制过来格式各种错误,还是就这样吧... 我们发现当a->b时,-a->b,-a->-b,a->-b中的x对答案的贡献都是一样的,所以我…
C. Banh-mi time limit per test:1 second memory limit per test:256 megabytes 题目链接:https://codeforc.es/contest/1062/problem/C Description: JATC loves Banh-mi (a Vietnamese food). His affection for Banh-mi is so much that he always has it for breakfast.…