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  1. using static System.Console;
  2.  
  3. string f(string s)
  4. {
  5.     return s.Aggregate("", (x, y) => x + (y == ' ' ? x.EndsWith(" ") ? "" : "    " : y));
  6. }
  7.  
  8. foreach (string s in new[] {"abc def        ghi", "a b     c", " a ", "  a", "a  ", " ", ""}) {
  9.     WriteLine($"\"{s}\" -> \"{f(s)}\"");
  10. }
Success #stdin #stdout 0.06s 30392KB
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stdin
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Standard input is empty
stdout
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"abc def        ghi" -> "abc    def    ghi"
"a b     c" -> "a    b    c"
" a " -> "    a    "
"  a" -> "    a"
"a  " -> "a    "
" " -> "    "
"" -> ""
https://ideone.com/SwAZsS
language:
C# (NET 6.0)
created:
10 days ago
visibility:
secret

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