HDU 1046

果然是数学题

#include <iostream>
#include <cstdio>
#include <cmath>
using namespace std;
int n,a,b;
int main()
{
    cin>>n;
    int k=1;
    while(n--)
    {
        printf("Scenario #%d:
",k++);
        cin>>a>>b;
        if(a%2==0||b%2==0)
        {
            printf("%.2lf
",a*b*1.0);
        }
        else 
        {
            printf("%.2lf
",a*b-1+sqrt(2.0));
        }
        puts("");
    }
}