#include<bits stdc++.h>
using namespace std;
int main()
{ double a,b,c,d,l,r,R,L;
scanf("%lf%lf%lf%lf%lf%lf", &a, &b, &c, &d, &l, &r);
if(a!=0)
{R=c*r/a+(d/a-b*c/(a*a))*log(fabs(a*r+b));
L=c*l/a+(d/a-b*c/(a*a))*log(fabs(a*l+b));}
else
{R=((c*r*r)/(2*b)+(d*r)/b);
L=((c*l*l)/(2*b)+(d*l)/b); }
// cout<<(a*r+b)<<" "<<(a*l+b); printf("%.6lf\n",(r-l)); return 0; }< pre></(a*r+b)<<" "<<(a*l+b);></bits>评论