func_code_string: #include <bits/stdc++.h>   using namespace std;   const int maxn = 1e5 + 5;   int n;   double r, v, l;   double tim(double p1, double p2) {     double rem = p2 - p1;     double k = int(rem / l);     rem = rem - k * l;     double le = 0, ri = 1e9, mid;     for (int I = 1; I <= 200; I++) {       mid = (le + ri) / 2.0;       if (v * mid + 2 * sin(v * mid / (2 * r)) * r >= rem) {         ri = mid;       } else {         le = mid;       }     }     return mid + double(k * l) / v;   }   int main() {     scanf( %d%lf%lf , &n, &r, &v);     l = 3.141592653589 * r * 2;     for (int i = 1; i <= n; i++) {       int p1, p2;       scanf( %d%d , &p1, &p2);       printf( %.10f n , float(tim(double(p1), double(p2))));     }     return 0;   }   