ironpython2001

//Version 1       Version 2   Result
//1.11.17         2.3.5          2.3.5
//2.1             2.1.3          2.1.3
//2.3.5           2.4            2.4.0
//3.1             2.4            3.1.0
//3.3             3.2.9          3.3.0
//7.2.71          7.2.71         7.2.71


 string s1 = "2.1";

ironpython2001

/*
check wellformedbracing

Input             Result      Comment
“(( ))”            True
“( )( )”           True
“(( )))((( ))”     False       Although it has the same amount of opening and closing braces, 
it is not properly nested
“((( )” False No suitable bracing

ironpython2001

/*
Input : [“hello”, “world”, “message”]
Separator:  “ +++ ” 
 Result: “hello +++ world +++ message”
*/
using System;
using System.Collections.Generic;


var input = new List<string>{"hello","world","message"};

ironpython2001

/*
Given a string s, return the longest palindromic substring in s.
Example 1:
Input: s = "babad"
Output: "bab"
Explanation: "aba" is also a valid answer.
Example 2:
Input: s = "cbbd"
Output: "bb"
*/