题解 | #多报名表的运动项目人数统计#
多报名表的运动项目人数统计
https://www.nowcoder.com/practice/423da9d9768243c89e3c724ba7e2ff4d
import sys
import pandas as pd
items = pd.read_csv('items.csv')
signup = pd.read_csv('signup.csv')
signup1 = pd.read_csv('signup1.csv')
user = pd.concat([signup, signup1], axis = 0)
df = items.merge(user, how = 'left', on = 'item_id')
print(df.groupby('item_name')['name'].count() > 0)
for line in sys.stdin:
a = line.split()
print(int(a[0]) + int(a[1]))
