y总算法基础课双指针例子用python实现

a = list(input())
i, j = 0, 0
while i < len(a):
    while j < len(a) and a[j] != ' ':
        j += 1
    k = i
    while k < j:
        print(a[k], end='')
        k += 1
    print()
    j += 1
    i = j

输入
abc def ghi

输出
abc
def
ghi