Golang Competitive Pragramming template

package main
import (
    "fmt"
    "strconv"
    "strings"
    "bufio"
    "os"
)

func cleanString(stream,seperator string) []int{
  trimmed_stream := strings.TrimSpace(stream)
  split_arr := strings.Split(trimmed_stream, seperator)
  clean_arr := make([]int, len(split_arr))
  for index,val := range split_arr{
    clean_arr[index], _ = strconv.Atoi(val)
  }
  return clean_arr
}

func main() {
    reader := bufio.NewReader(os.Stdin)
    stream,_ := reader.ReadString('\n')
    N := cleanString(stream," ")[0]
    stream,_ = reader.ReadString('\n')
    array := cleanString(stream," ")
    
    sum := 0
    for i:=0;i<N;i++{
        sum += array[i]
    }
    fmt.Println(sum)
}