func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     cin.tie(0);     cin.sync_with_stdio(0);     int t;     cin >> t;     while (t--) {       double a, b;       cin >> a >> b;       cout << fixed << setprecision(15);       if (b == 0) {         cout << 1 << endl;       } else if (a == 0) {         cout << 0.5 << endl;       } else if (a > b * 4) {         cout << 1 - b / a << endl;       } else {         double remain = b - a / 4;         cout << 1 - (b + remain) / (4 * b) << endl;       }     }   }   