C++ Py3 reverse 2pointer解Leetcode 2375 Construct Smallest Number From D...

C++ Py3 reverse 2pointer解Leetcode 2375  Construct Smallest Number From DI String

[codes on Leetcode]https://leetcode.com/problems/construct-smallest-number-from-di-string/solutions/6435240/suffix-sum-for-successive-ds-c-py3-beats-100/