def foo(s): if s == "": return s else: return foo(s[1:]) + s[0] print(foo('seu'))
def foo(s): if s == "": return s else: return foo(s[1:]) + s[0] print(foo('seu'))
发布时间:2025-07-28 18:26:38
def foo(s): if s == "": return s else: return foo(s[1:]) + s[0] print(foo('seu'))