22 lines
501 B
C#
22 lines
501 B
C#
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public class Solution {
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public string MakeGood(string s) {
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var st = new List<char>();
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foreach (char c in s) {
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var idx = st.Count - 1;
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if (
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idx < 0
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|| Char.ToLower(c) != Char.ToLower(st[idx])
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|| Char.IsUpper(c) == Char.IsUpper(st[idx])
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) {
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st.Add(c);
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} else {
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st.RemoveAt(idx);
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}
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}
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return new string(st.ToArray());
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}
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}
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