#include<bits/stdc++.h>   #include<iostream>   #define db long double   usingnamespacestd;   structsd{db v,w,t;};   constintM=55;   intn;   db totw,le,ri,mid,u,t;   sd riv[M];   db sqr(db x){returnx*x;}   voidin()   {       scanf("%d%Lf%Lf",&n,&u,&t);       for(inti...