package extra;
import java.io.PrintWriter;
import java.math.BigDecimal;
import java.math.MathContext;
import java.util.Arrays;
import java.util.Scanner;

public class P3072 {
	static Scanner in;
	static PrintWriter out;
	static String INPUT = "";

	static MathContext mc = new MathContext(40);
	static BigDecimal mc(long n){
		return BigDecimal.valueOf(n).sqrt(mc);
	}

	static void solve()
	{
		BigDecimal ret = BigDecimal.ZERO;
		for(int T = ni();T > 0;T--){
			ret = ret.add(mc(nl()));
			out.println(ret.toPlainString());
		}
	}
	
	public static void main(String[] args) throws Exception
	{
		in = INPUT.isEmpty() ? new Scanner(System.in) : new Scanner(INPUT);
		out = new PrintWriter(System.out);
		
		solve();
		out.flush();
	}
	
	static int ni() { return Integer.parseInt(in.next()); }
	static long nl() { return Long.parseLong(in.next()); }
	static double nd() { return Double.parseDouble(in.next()); }
	static void tr(Object... o) { if(INPUT.length() != 0)System.out.println(Arrays.deepToString(o)); }
}