include [HTML_REMOVED]
include[HTML_REMOVED]
using namespace std;
int N=1e6;
int a[100000];
int n,m;
int check(double x)
{
int res=0;
for(int i=0;i[HTML_REMOVED]=m) return 1;
}
return 0;
}
int main()
{
cin>>n>>m;
for(int i=0;i[HTML_REMOVED]>a[i];
}
double l=0;
double r=1e9;
while(r-l>1e-6)
{
double mid=(l+r)/2.0;
if(check(mid)) l=mid;
else r=mid;
}
printf(“%.2lf”,l);
return 0;
}