func_code_string: #include <bits/stdc++.h>   using namespace std;   double x1, yy1, x2, y2, v, t, vx, vy, wx, wy, l, r, mid, x, y, dis;   int main() {     scanf( %lf%lf , &x1, &yy1);     scanf( %lf%lf , &x2, &y2);     scanf( %lf%lf , &v, &t);     scanf( %lf%lf , &vx, &vy);     scanf( %lf%lf , &wx, &wy);     l = 0.0;     r = 1e9;     for (int i = 1; i <= 1000; ++i) {       mid = (l + r) / 2;       x = x2 - x1 - min(t, mid) * vx - max(0.0, mid - t) * wx;       y = y2 - yy1 - min(t, mid) * vy - max(0.0, mid - t) * wy;       dis = sqrt(x * x + y * y);       if (v * mid > dis)         r = mid;       else         l = mid;     }     printf( %.10lf n , l);     return 0;   }   