[Jianzhi offer] Jianzhi offer 05 Replace spaces

subject
Code
【 Method 1】
Execution time ：32 ms, In all Python3 Defeated in submission 72.46% Users of
Memory consumption ：15 MB, In all Python3 Defeated in submission 53.18% Users of
Pass the test case ：27 / 27

class Solution:
    def replaceSpace(self, s: str) -> str:
        s=s.replace(" ","%20")
        return s

【 Method 2】
Execution time ：32 ms, In all Python3 Defeated in submission 72.46% Users of
Memory consumption ：14.9 MB, In all Python3 Defeated in submission 78.35% Users of
Pass the test case ：27 / 27

class Solution:
    def replaceSpace(self, s: str) -> str:
        ans=""
        for item in s:
            if ord(item)==32:
                ans+="%20"
            else:
                ans+=item
        return ans

【 Method 3】
Execution time ：40 ms, In all Python3 Defeated in submission 19.32% Users of
Memory consumption ：14.9 MB, In all Python3 Defeated in submission 60.09% Users of
Pass the test case ：27 / 27

class Solution:
    def replaceSpace(self, s: str) -> str:
        ss=s.split(' ')
        return "%20".join(ss)