hdu 2071

#include<iostream>#include<cmath>#include<iomanip>using namespace std;int main(){int n,i;double * a;cin>>n;while(n--){cin>>i;a=new double [i];for(int j=0;j<i;j++){cin>>a[j];}double max=a[0];for(int j=1;j<i;j++){if(a[j]>max)max=a[j];}cout<<fixed<<setprecision(2)<<max<<endl;}return 0;}