题解 | 无法吃午餐的学生数量

#
# 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
#
#
# @param students int整型一维数组
# @param sandwiches int整型一维数组
# @return int整型
#
class Solution:
    def countStudents(self, students: List[int], sandwiches: List[int]) -> int:
        # write code here
        k = 0
        while sandwiches:
            if students[0] == sandwiches[0]:
                students.pop(0)
                sandwiches.pop(0)
                k = 0
            else:
                students.append(students.pop(0))
                k += 1
            if k == len(sandwiches):
                break
        return k