题解 | 牛客用户刷题量的方差与提交次数的标准差
牛客用户刷题量的方差与提交次数的标准差
https://www.nowcoder.com/practice/4ca5272bc96c453b9c70fccc039a0679
import pandas as pd
df = pd.read_csv('Nowcoder.csv')
print('%.2f'%df['Num_of_exercise'].var())
print('%.2f'%df['Number_of_submissions'].std())
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