func_code_string: #include <bits/stdc++.h>   using namespace std;   const double eps = 1e-10, pi = acos(-1.0);   int main() {     int n, t = 1;     while (t--) {       double a, b, x, y, v;       double ans = 1000000000.00;       cin >> a >> b;       cin >> n;       for (int i = 0; i < n; i++) {         cin >> x >> y >> v;         double d = sqrt(((x - a) * (x - a)) + ((y - b) * (y - b)));         ans = min(ans, d / v);       }       printf( %0.08lf n , ans);     }     return 0;   }   