这个python为什么运行不了？

x = 1
while x <= 100:
    y = 1
    while y <= 100:
        z = 1
        while x <= 100:
            if x*5 + y*3 + z/3 == 100 and x + y + z == 100:
               print("公鸡{}只，母鸡{}只，小鸡{}只".format(x, y, z))
            z += 1
            y += 1
            x += 1

因为第7行你写错了
应该写成
while z <=100: