#include <iostream>
#include <iomanip>
using namespace std;
class RainfallCalculator{
private:
   static int n;
   static double total;
public:
   static void calculate(){
       if (!(cin >> n)){
           cout<<"Incomplete Data";
           return;
        }
        if(n<1||n>100){
            cout<<"Incomplete Data";
            return;
        }
        total=0
        double value;
        for (int i = 0;i < n; i++){
            if (!(cin>>value)){
                cout<<"Incomplete Data";
                return;
            }
            total+=value;
        }
        cout<<fixed<<setprecision(2)<<total;
    }
};
int RainfallCalculator::n=0;
double RainfallCalculaator::total=0.0;
int main(){
    RainfallCalculator::calculate();
    return 0;
}