#!/usr/bin/Python
#-*- coding:utf-8 -*-
import random
import math
def monteCarlo(N):
i = 0
count = 0
while i <= N:
x = random.random()
y = random.random()
if pow(x, 2) + pow(y, 2) < 1:
count += 1
i += 1
pi = 4 * count / N
print(pi)
monteCarlo(1000000)