鸡兔同笼

一、一个笼子里关了若干只兔子和鸡（兔子有4只腿，鸡有2只腿），则笼子里面至多有多少只动物，至少有多少只动物

n = eval(input())
l = list()
for k in range(n):
    a = int(input())
    if (a%2) != 0:
        min = max = 0
    else:
        j = int(a/4)
        i = a%4
        m = int(i/2)
        min = m+j
        max = int(a/2)
    l += [(min,max)]
for b,c in l:
    print(b,c,end='')
    print(end='\n')

 

二、用户在同一行输入两个整数。代表头和脚的数量，计算笼子里有多少只鸡和兔子

 

head,foot = map(int,input().split())
if int(foot-head*2)/2==(foot-head*2)/2 and foot-head*2 > 0 and head>=0 and foot>=0:
    print(int(head-(foot-head*2)/2), int((foot-head*2)/2))
else:
    print('data error!')