Codeforces 523B - Mean Requests 英语阅读题

 

 1 #include "bits\stdc++.h"
 2 using namespace std;
 3 int n, T;
 4 double c;
 5 int ans[200010];
 6 
 7 int m, p;
 8 
 9 int main()
10 {
11     scanf("%d%d%lf", &n, &T, &c);
12     int i;
13     for(i = 1; i <= n; ++i) {
14         scanf("%d", &ans[i]);
15     }
16     scanf("%d", &m);
17     i = 1;
18     __int64 sum = 0;
19     double mean = 0;
20     int j;
21     for(j = 1; j <= m; ++j) {
22         scanf("%d", &p);
23         for( ; i <= p; ++i) {
24             sum += ans[i];
25             if(i > T)
26                 sum -= ans[i - T];
27             mean = (mean + (double)ans[i] / T) / c;
28         }
29         double real = (double)sum / T;
30         printf("%f %f %f\n", real, mean, (double)fabs(mean - real) / real);
31     }
32 }

 

posted @ 2015-03-28 20:36  AC_Phoenix  阅读(202)  评论(0)    收藏  举报