func_code_string: #include <bits/stdc++.h>   using namespace std;   int i, t;   double a, b;   int main() {     cin >> t;     for (i = 0; i < t; i++) {       cin >> a >> b;       if (b == 0) {         cout << 1 << endl;         continue;       }       b *= 4;       if (a > b) {         cout << 1.0 - b / (4.0 * a) << endl;         continue;       }       cout << (a / 2.0 + b) / (2.0 * b) << endl;     }     return 0;   }   