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package correct
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import (
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"fmt"
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"os"
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"strconv"
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)
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func solve(x, y int) {
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for i := 0; i < x; i++ {
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line := ""
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for j := 0; j < y; j++ {
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if (i%2 == 0) && (j%2 == 0) {
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line += "#"
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} else if (i%2 == 0) && (j%2 == 1) {
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line += " "
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} else if (i%2 == 1) && (j%2 == 1) {
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line += "#"
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} else {
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line += " "
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}
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}
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fmt.Println(line)
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}
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}
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func main() {
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args := os.Args[1:]
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if len(args) != 2 {
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fmt.Println("Error")
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return
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}
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x, _ := strconv.Atoi(args[1])
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y, _ := strconv.Atoi(args[0])
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if x <= 0 || y <= 0 {
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fmt.Println("Error")
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return
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}
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solve(x, y)
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}
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