Mike and Geometry Problem 题目链接: http://acm.hust.edu.cn/vjudge/contest/121333#problem/I Description Mike wants to prepare for IMO but he doesn't know geometry, so his teacher gave him an interesting geometry problem. Let's define f([l, r]) = r - l + 1…

离散化,树状数组,组合数学. 这题的大致思路和$HDU$ $5700$一样.都是求区间交的问题.可以用树状数组维护一下. 这题的话只要计算每一个$i$被统计了几次,假设第$i$点被统计了$ans[i]$次,累加和就是答案. $ans[i]$就是看$i$点之后有多少个区间右端点,假设有$m$个,那么$ans[i]$就等于$m$个里面选$k$个的方案数. 因为数据中$L$,$R$范围较大,所以需要先离散化,计算离散化之后的情况,然后再统计离散化之前的情况. #pragma comment(linke…

E. Mike and Geometry Problem 题目连接: http://www.codeforces.com/contest/689/problem/E Description Mike wants to prepare for IMO but he doesn't know geometry, so his teacher gave him an interesting geometry problem. Let's define f([l, r]) = r - l + 1 to…

E. Mike and Geometry Problem time limit per test 3 seconds memory limit per test 256 megabytes input standard input output standard output Mike wants to prepare for IMO but he doesn't know geometry, so his teacher gave him an interesting geometry pro…

任意门:http://codeforces.com/contest/689/problem/E E. Mike and Geometry Problem time limit per test 3 seconds memory limit per test 256 megabytes input standard input output standard output Mike wants to prepare for IMO but he doesn't know geometry, so…

题目链接: E. Mike and Geometry Problem time limit per test 3 seconds memory limit per test 256 megabytes input standard input output standard output Mike wants to prepare for IMO but he doesn't know geometry, so his teacher gave him an interesting geomet…

原题: Description Mike wants to prepare for IMO but he doesn't know geometry, so his teacher gave him an interesting geometry problem. Let's define f([l, r]) = r - l + 1 to be the number of integer points in the segment [l, r] with l ≤ r (say that ). Y…

C. Mike and gcd problem time limit per test: 2 seconds memory limit per test: 256 megabytes input: standard input output: standard output Mike has a sequence A = [a1, a2, ..., an] of length n. He considers the sequence B = [b1, b2, ..., bn] beautiful…

C. Mike and gcd problem http://www.cnblogs.com/BBBob/p/6746721.html #include<iostream> #include<cstdio> #include<string> #include<cstring> #include<algorithm> #include<cmath> using namespace std; ; int a[maxn]; int gcd(…

题目:Mike and gcd problem 题意:给一个序列a1到an ,如果gcd(a1,a2,...an)≠1,给一种操作,可以使ai和ai+1分别变为(ai+ai+1)和(ai-ai+1);问需要执行几次这个操作才能使得gcd(a1,a2,...an)>1. 分析: 1.首先,答案总是YES. 2,假设gcd(a1,a2,...an)=1,在一次对ai和ai+1的操作后新的gcd为d,则d满足:d|ai - ai + 1 and d|ai + ai + 1  d|2ai and d|2…