第一周 7.19-7.25

 1 # include <iostream>
 2 # include <cstdio>
 3 # include <cstring>
 4 # include <algorithm>
 5 using namespace std;
 6 const long double pi=3.141592653589793;
 7 long double MAX[360];
 8 
 9 int main(void)
10 {
11     int T; cin>>T;
12     while(T--)
13     {
14         memset(MAX,0,sizeof(MAX));
15         int n; scanf("%d",&n);
16         while(n--)
17         {
18             int a,b; long double r;
19             scanf("%Lf%d%d",&r,&a,&b);
20             a+=90; b+=90;
21             for(int i=a;i<b;i++) MAX[i]=max(MAX[i],r);
22         }
23         long double ans=0;
24         for(int i=0;i<360;i++) ans+=pi*MAX[i]*MAX[i]/360;
25         printf("%Lf\n",ans);
26     }
27     return 0;
28 }