H - 【59】Lazier Salesgirl 模拟//lxm
Kochiya Sanae is a lazy girl who makes and sells bread. She is an expert at bread making and selling. She can sell the i-th customer a piece of bread for price pi. But she is so lazy that she will fall asleep if no customer comes to buy bread for more than w minutes. When she is sleeping, the customer coming to buy bread will leave immediately. It's known that she starts to sell bread now and the i-th customer come after ti minutes. What is the minimum possible value of w that maximizes the average value of the bread sold?
Input
There are multiple test cases. The first line of input is an integer T ≈ 200 indicating the number of test cases.
The first line of each test case contains an integer 1 ≤ n ≤ 1000 indicating the number of customers. The second line contains n integers 1 ≤ pi ≤ 10000. The third line contains n integers 1 ≤ ti ≤ 100000. The customers are given in the non-decreasing order of ti.
Output
For each test cases, output w and the corresponding average value of sold bread, with six decimal digits.
Sample Input
2
4
1 2 3 4
1 3 6 10
4
4 3 2 1
1 3 6 10
Sample Output
4.000000 2.500000
1.000000 4.000000 题意是要求出时间w使得卖出面包的平均价格最大
这个题可以求出到第i个客服保持清醒的时间w[i]然后模拟一遍就可
#include <iostream> #include <stdio.h> #include <cmath> using namespace std; #define maxn 1111 int p[maxn], times[maxn], w[maxn]; int t,n; int main() { cin>>t; while(t--) { cin>>n; for(int i=;i<n;i++) cin>>p[i]; for(int i=;i<n;i++) cin>>times[i]; w[]=times[]; for(int i=;i<n;i++) w[i]=max(times[i]-times[i-],w[i-]);//到第i个所需要的最大的时间 double the_time=,sum,ave,time; ave=; for(int i=;i<n;i++) { time=w[i]; sum=; int cnt=; for(int j=;j<n;j++) { if(time>=w[j]) { sum+=p[j]; cnt++; } else break; } if(ave<sum/cnt) { ave=sum/cnt; the_time=time; } else if (ave==sum/cnt) { the_time=min(the_time,time); } } printf("%.6lf %.6lf\n",the_time,ave); } return ; }
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