func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(0);     cin.tie(0);     int n;     double f, s, v, l, omega, r;     const double tol = 1.0e-7;     scanf( %d %lf %lf , &n, &r, &v);     omega = v / r;     double xt, xb, a, b;     for (int i = 0; i < n; i++) {       scanf( %lf %lf , &s, &f);       l = (f - s) / 2.;       a = (l + r + 0.1) / v;       b = -0.1;       xt = (a + b) / 2.;       while (abs((b - a) / xt) > tol) {         if ((v * xt + r * sin(xt * omega) - l) *                 (v * a + r * sin(a * omega) - l) <             0.)           b = xt;         else           a = xt;         xt = (a + b) / 2.;       }       a = (l + r + 0.1) / v;       b = -0.1;       do {         xb = (a + b) / 2.;         if ((v * xb - r * sin(xb * omega) - l) *                 (v * a - r * sin(a * omega) - l) <             0.)           b = xb;         else           a = xb;       } while (abs((b - a) / xb) > tol);       printf( %.10lf n , 2. * min(xb, xt));     }     return 0;   }   