16 lines
260 B
Go
16 lines
260 B
Go
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package d9
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import (
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"fmt"
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"strings"
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)
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func addWalls(lines []string) []string {
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for i, line := range lines {
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lines[i] = fmt.Sprintf("9%v9", line)
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}
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nines := strings.Repeat("9", len(lines[0]))
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return append([]string{nines}, append(lines, nines)...)
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}
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