heads = int (input('输入总头数'))
feet = int(input('输入总 脚数'))
for chiken in range (heads+1):
rabbit = heads-chiken
if chiken*2 + rabbit*4 == feet:
print(rabbit)
print(chiken)
break
头 = int (input('输入总头数'))
脚= int(input('输入总脚数'))
def cal():
global 头
global 脚
for 鸡 in range(头+1):
兔 = 头-鸡
if 鸡*2 + 兔*4 == 脚:
print(兔)
print(鸡)
cal()