func_code_string: #include <bits/stdc++.h>   const double pi = acos(-1.0);   int main() {     int n;     double s, f, r, v, t;     scanf( %d %lf %lf , &n, &r, &v);     double p = 2 * pi * r;     double tp = p / v;     while (n--) {       scanf( %lf %lf , &s, &f);       double x = f - s;       double cyc = floor(x / p);       double rem = (x - cyc * p) / r / 2;       double lo = 0, hi = pi;       for (int i = 0; i < 60; ++i) {         double mid = (lo + hi) / 2;         if (mid + sin(mid) < rem)           lo = mid;         else           hi = mid;       }       t = cyc * tp + 2 * lo * r / v;       printf( %.8lf n , t);     }   }   