#include <iostream>

using namespace std;

#include <boost/multiprecision/cpp_dec_float.hpp>
using namespace boost::multiprecision;

int main() {
  cout << fixed << setprecision(17);
  int n;
  scanf("%d", &n);
  number<cpp_dec_float<128>> ans = 0;
  while (n--) {
    number<cpp_dec_float<128>> x;
    cin >> x;
    ans += sqrt(x);
    printf("%.17Lf\n", (long double)ans);
  }
  return 0;
}