﻿#  学号:1827402015
#  姓名:金晗昕
#  IP:192.168.157.231
#  上传时间:2018/11/12 15:21:51

import math
def func1(a,b):
    return

def func2(a,b):
    return
            
def func3(ls

if __name__=="__main__":
	pass
