九度 题目1002：Grading

模拟题。代码：

#include <cstdio>
#include <cmath>
#include <iostream>

using namespace std;

int main()
{
float p, t, g1, g2, g3, gj;

while (cin >> p >> t >> g1 >> g2 >> g3 >> gj)
{
if (abs(g1-g2) <= t)
{
printf("%.1f\n", (g1+g2)/2.0);
} else if (abs(g1-g3)<=t && abs(g2-g3)<=t)
{
printf("%.1f\n", max(max(g1,g2), g3));
} else if (abs(g1-g3)<=t || abs(g2-g3)<=t)
{
if (abs(g1-g3) < abs(g2-g3))
{
printf("%.1f\n", (g1+g3)/2.0);
} else
{
printf("%.1f\n", (g2+g3)/2.0);
}
} else
{
printf("%.1f\n", gj);
}
}

return 0;
}