package com.nagarro;

import java.text.DecimalFormat;
import java.util.Scanner;

public class SquareRoot {

    public static void main(String[] args) {

        Scanner scn = new Scanner(System.in);
        int tc = scn.nextInt();

        for (int i = 0; i < tc; i++) {
            int n = scn.nextInt();
            System.out.println(new StringBuilder("%10d.4f", squareRoot(n));
            DecimalFormat df = new DecimalFormat("#.####");

        }

//        double d = squareRoot(100, 4);
//        int k = (int)(d*10000);
//        String p = String.valueOf(k);
//        int len = p.length();
//        System.out.println(p.substring(0, len-4) + "." + p.substring(len-4, p.length()));
//
////        System.out.println(squareRoot(100, 4));
//
//        // Function calling
//        System.out.println(squareRoot(1000, 4));


    }

    private static float squareRoot(int num) {
        int start = 0, end = num;
        int middleNumber;

        double currentAnswer = 0.0;

        while (start <= end) {
            middleNumber = (start + end) / 2;

            if (middleNumber * middleNumber == num) {
                currentAnswer = middleNumber;
                break;
            }
            if (middleNumber * middleNumber < num) {
                start = middleNumber + 1;
                currentAnswer = middleNumber;
            } else {
                end = middleNumber - 1;
            }
        }

        float increment = (float) 0.1;
        for (int i = 0; i < 4; i++) {
            while (currentAnswer * currentAnswer <= num) {
                currentAnswer += increment;
            }

            currentAnswer = currentAnswer - increment;
            increment = increment / 10;
        }
        return (float) currentAnswer;
    }
}