homework03

x = 1
zs = 0
fs = 0
i = 0
sum_ = 0

while x != 0:
    x = int(input('输入一个整数，以输入0结束'))
    if(x>0):
        zs += 1
    elif(x<0):
        fs += 1
    i += 1
    sum_ = sum_ + x
if sum_ != 0:
    xx = sum_/(i-1)
    print(zs,fs,sum_,xx)  
else:
    print("结束") 

a = 10000
for i in range(14):
    a = a*0.05+a
    if i == 11:
        print(a)

 count=0
    for i in range(100,1001):
        if i%5 == 0 and i%6 == 0:
            count += 1
            print(i,end=" ")
            if count % 10 == 0:
                print("\n")

n = 1
while n*n <= 12000:
    n += 1
print(n)

n1 = 1
while n1**3 <= 12000:
    n1 += 1
print(n1)

 n = 0
    for i in range(1,5000,-1):
        n= n + 1/i
    print(n)
    
    n = 0
    for i in range(1,5000,1):
        n= n + 1/i
    print(n)

sum = 0
for i in range(3,100,2):
    sum += (i-2)/i
print(sum)

x = 0
for i in range(1,10000):
    x += 4*((-1)**(i+1)/(2*i-1))
    print(x)

   for i in range(1,10001):
    s= 0
    for j in range(1,i):
        if i%j == 0:
            s = s+j
    if i == s:
        print(i)

a = [ ]
for i in range(1,8):
for j in range(1,8):
if i != j and sorted([i,j]) not in a:
a.append([i,j])
print(a)
print(len(a))

import numpy as np
arr = []
i = 1
while i <= 10:
    x = float(input('请输入十个数'))
    arr.append(x)
    i += 1
arr_mean = np.mean(arr)
arr_var = np.var(arr)
print(arr_mean)
print(arr_var)