-*- coding: utf-8 -*-

"""
Spyder Editor

This is a temporary script file.
"""

import math
a=int(input())
b=a/3.1415
c=math.sqrt(b)
print(round(c,3))

print(round((int(input())/3.1415)**0.5,3))
#python3

一行代码解决问题（smirk

import math
n=int(input())
r=math.sqrt(n/3.1415)
print(round(r,3))
#python3

#include <stdio.h>
#include<cmath>
#include<iostream>
using namespace std;
double n;
int main()
{
    cin>>n;
    printf("%.3f",sqrt(n/3.1415));
    return 0;
}

import math;print(round(math.sqrt((eval(input())/3.1415)),3))

s=int(input())
r=(s/3.1415)**0.5
print(round(r,3))

import math
s=int(input("请输入圆的面积："))
r=math.sqrt(s/3.1415)
print("圆的半径为",round(r,2))