题解 | #牛客网每日正确与错误的答题次数#

import sys
import  pandas as pd 
for line in sys.stdin:
    a = line.split()
    print(int(a[0]) + int(a[1]))
f=pd.read_csv("nowcoder.csv",sep=",")
f1=f[f["date"]>="2021/12/01"] 
f3=f1[f1["date"]<="2021/12/31"]
f3["year-month-day"]=pd.to_datetime(f["date"],format="%Y-%m-%d")
f4=f3.groupby(["result","year-month-day"]).question_id.count()
print(f4)