import sys for line in sys.stdin: a = line.split() print(int(a[0]) + int(a[1])) import pandas as pd df=pd.read_csv('sales.csv') #计算RFM值 df['R_Quartile']=pd.qcut(df['recency'],4,['4','3','2','1']).astype('str') df['F_Quartile'] = pd.qcut(df['frequency'],4,["1", "2", &qu...