mathfactorpaste

def main():
    import random

    planestatus = [ [1,0], [2,0], [3,0],[4,0],[5,0]]
    passengers = [1,2,3,4,5]

    crazyguypos= random.randint(0,4)


    planestatus[crazyguypos][1] = 1
    del passengers[0]
    i=0

    while len(passengers) != 0:

        numtoadd = passengers[i]
        if planestatus[numtoadd-1][1] == 0:
            planestatus[numtoadd-1][1] = numtoadd


        else:

            listfreepos = []
            for e in range(5):
                if planestatus[e][1] == 0:
                    listfreepos.append(e)

            rannum = random.randint(0,len(listfreepos)-1)

            ranpos = listfreepos[rannum]


            planestatus[ranpos][1] = numtoadd

        del passengers[i]

    if planestatus[4][0] == planestatus[4][1]:
        return 1
    return 0

thesum = 0
for e in range(200000):
    thesum=thesum + main()

print thesum/200000.