func_code_string: #include <bits/stdc++.h>   using namespace std;   int INT_MAX_VAL = (int)0x3F3F3F3F;   int INT_MIN_VAL = (int)-0x3F3F3F3F;   long long LONG_MAX_VAL = (long long)0x3F3F3F3F3F3F3F3F;   long long LONG_MIN_VAL = (long long)-0x3F3F3F3F3F3F3F3F;   long long vx, vy, wx, wy;   long long R;   long double t;   bool solve(long double s, long double dx, long double dy) {     if (s <= t) {       dx -= vx * s;       dy -= vy * s;     } else {       dx -= wx * (s - t) + vx * t;       dy -= wy * (s - t) + vy * t;     }     return (dx * dx + dy * dy) <= (R * R * s * s);   }   int main() {     cin.tie(0);     ios::sync_with_stdio(false);     long long x1, y1, x2, y2;     cin >> x1 >> y1 >> x2 >> y2;     cin >> R >> t;     cin >> vx >> vy >> wx >> wy;     long double l = 0;     long double r = 1.0e9;     while ((abs(r - l) / max(1.l, l)) > 1e-9) {       double c = (l + r) / 2;       if (solve(c, x2 - x1, y2 - y1)) {         r = c;       } else {         l = c;       }     }     cout << setprecision(15) << fixed << l <<   n ;     return 0;   }   