题解 | #多报名表的运动项目人数统计#

import sys

for line in sys.stdin:
    a = line.split()
    print(int(a[0]) + int(a[1]))
import pandas as pd
items = pd.read_csv('items.csv',sep = ',')
signup = pd.read_csv('signup.csv',sep = ',')
signup1 = pd.read_csv('signup1.csv',sep = ',')

pd.set_option('display.width',300)
pd.set_option('display.max_rows',None)
pd.set_option('display.max_columns',None)

df1 = pd.merge(signup,signup1, how = 'outer')
df2 = pd.merge(items,df1, how = 'inner', on = 'item_id')

df3 = df2.groupby(['item_name'])['employee_id'].count()
# df3 = df3[df3['employee_id'] != 0]
# print(df3.info())
print(df3)