Py3 C++陣列迴圈速解Leetcode 1323 Maximum 69 Number

Py3 C++陣列迴圈速解Leetcode 1323  Maximum 69 Number

學程式的第一式，就是要會活用陣列迴圈，足以解Leetcode 1323. Maximum 69 Number 

[Py3解請進]

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The first step in learning programming is to be able to use array loops to solve problem

[codes on Leetcode]https://leetcode.com/problems/maximum-69-number/solutions/7085969/single-loop-no-string-c-py3-beats-100/

class Solution:
    def maximum69Number (self, num: int) -> int:
        tens=  (1000, 100, 10, 1)
        for t in tens:
            r=num//t%10
            if r==6:
                return num+3*t
        return num