# include <iostream>
# include <cstdio>
using namespace std;
int main()
{
int n;
double sum = 0;
scanf("%d", &n);
if(n <= 150)
{
for (int i = 1; i <= n; i++)
{
sum += 0.4463;
}
}
else if(n > 150 && n <= 400)
{
for (int i = 1; i <= n; i++)
{
sum += 0.4663;
}
}
else
{
for (int i = 1; i <= n; i++)
{
sum += 0.5663;
}
}
printf("%.1f\n", sum);
return 0;
}
为什么只有二十分?