📅  最后修改于: 2022-03-11 14:44:56.744000             🧑  作者: Mango
#include
#include
using namespace std;
int main()
{
int a, b;
cin >> a >> b;
double x;
x = b / (a + 2.0);
cout << fixed << setprecision(2) << x << endl;
return 0;
}