using System;
using System.Text.RegularExpressions;
class Program
{
static void Main()
{
string s = "c# \n c c++ \n java python\n";
s = RemoveNewLines(s);
Console.Write(s); // result without extra spaces
}
static string RemoveNewLines(string input) {
if (input == null)
return string.Empty;
// Replace any run of whitespace (spaces, tabs, newlines, etc.) with a single space
input = Regex.Replace(input, @"\s+", " ");
// Trim leading/trailing spaces
return input.Trim();
}
}
/*
run:
c# c c++ java python
*/