```go
package main
import (
"fmt"
)
func main() {
var arr = []int{6, 5, 3, 1, 8, 7, 2, 4, 9, 0, 3}
fmt.Println(arr)
CountingSort(arr)
}
func CountingSort(arr []int) {
ln := len(arr)
var sortAry = make([]int, ln, ln)
var countAry = make([]int, ln, ln)
for _, n := range arr {
countAry[n]++
}
fmt.Println("count arr :", countAry)
for i := 1; i < ln; i++ {
countAry[i] += countAry[i-1]
}
fmt.Println("count arr add:", countAry)
for _, kv := range arr {
countAry[kv]--
sortAry[countAry[kv]] = kv
}
fmt.Println(sortAry)
}
```
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