大佬，（B3932 [语言月赛 202402] 酒 https://www.luogu.com.cn/problem/B3932#submit） 哪错了？

#include<bits/stdc++.h>
using namespace std;
double a, b, c;

int main()
{
cin>>a>>b>>c;
double mx = max(a * x + b * y, max(c * y, d * x + e));
  if (a * x + b * y == mx) printf("1 %.2lf\n", mx);
else if (c * y == mx) printf("2 %.2lf\n", mx);
else printf("3 %.2lf\n", mx);
return 0;
}

1   AC
2   AC
3   WA  Wrong Answer.wrong answer On line 1 column 4, read 9, expected 6.
4   AC
5   AC
6   WA  Wrong Answer.wrong answer On line 1 column 3, read 8, expected 3.
7   AC
8   AC
9   WA  Wrong Answer.wrong answer On line 1 column 8, read 3, expected 0.
10   WA  Wrong Answer.wrong answer On line 1 column 1, read 3, expected 2.