#include <bits/stdc++.h>
#include <boost/multiprecision/cpp_dec_float.hpp>
using namespace std;
using bdec = boost::multiprecision::cpp_dec_float_100;

int main() {
  cin.tie(nullptr);
  ios_base::sync_with_stdio(false);
  int N;
  cin >> N;
  bdec ans = 0;
  long double x;
  while (cin >> x) cout << fixed << setprecision(20) << (ans += sqrtl(x)) << "\n";
}