hdu 4438

比较水的概率题；写出公式即可

#include <iostream>
#include <stdio.h>
#include <string>
#include <string.h>
#include <algorithm>
using namespace std;

int main()
{
    int T;
    scanf("%d",&T);
    while(T--)
    {
        double  x,y,p,q;
        scanf("%lf%lf%lf%lf",&x,&y,&p,&q);
        double tmp1=((1-q)+1.0*q*p*(1-p))*x;
               tmp1+=1.0*q*(1-p)*p*y;
               tmp1+=1.0*q*p*p*(x+y);

        double tmp2=(1-q)*(1-p)*p*x;
               tmp2+=(q+(1-q)*p*(1-p))*y;
               tmp2+=(1-q)*p*p*(x+y);
        if(tmp1>tmp2)
        {
           printf("tiger %.4lf\n",tmp1);
        }
        else
           printf("wolf %.4lf\n",tmp2);
    }
    return 0;
}