【Gym - 101124A】The Baguette Master （数学，几何）

#include <cstdio>
#include <cstring>
#include <algorithm>
#include <cmath>
using namespace std;
double a,b,c,d,e,h;
double get(double t){
	return h/tan(t/2)*2;
}
double getc(double a,double b,double c){
	return acos((a*a+b*b-c*c)/2/a/b);
}
int main() {
	scanf("%lf%lf%lf%lf%lf%lf",&h,&a,&b,&c,&d,&e);
	printf("%.3f",a+b+c+d+get(getc(d,e,c)+getc(a,e,b))+get(getc(c,e,d)+getc(b,e,a))+get(getc(d,c,e))+get(getc(a,b,e)));
	return 0;
}