CCF CSP认证题目(Python)

2022-12-1

n, i = input().split()
n = int(n)
i = float(i)

sum = 0
text = list(input().split())

for j in range(n + 1):
    text[j]=int(text[j])
    sum += text[j] * ((i+1) ** (n - j + 1))

sum = sum/((i+1) ** (n + 1))
print("%.3f"%sum)

2022-6-1

import math

n = input()
n = int(n)

text = list(input().split())
sum = 0
for i in range(n):
    text[i] = float(text[i])
    sum += text[i]

average = sum / n
sum2 = 0
for i in range(n):
    text[i] = float(text[i])
    sax = (average - text[i]) ** 2
    sum2 += sax

D = sum2 / n
for i in range(n):
    fx = (text[i] - average) / math.sqrt(D)
    print(fx)