Updated argument count validation
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@@ -64,7 +64,7 @@ func main() {
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// 2. Build NFA from postfix representation (Thompson's algorithm)
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// 3. Run the string against the NFA
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if len(flag.Args()) != 1 { // flag.Args() also strips out program name
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if len(flag.Args()) < 1 || len(flag.Args()) > 2 { // flag.Args() also strips out program name
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fmt.Println("ERROR: Missing cmdline args")
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os.Exit(22)
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}
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