from random import *
from math import *

def X(n):
    x=0
    for j in range(n):
        a=random()
        if a<=0.5:
            x=x-1
        else:
            x=x+1
    return x

def Moyenne(n,N):
    som=0
    for i in range(N):
        som=som+X(n)
    m=som/N
    return m

def Proportion(n,N,Q,delta):
    l=0
    for j in range(Q):
        if abs(Moyenne(n,N))>=delta:
            l=l+1
    p=l/Q
    return p