package main
import "fmt"
 
func hitungNomorBit(angka int, nomorBit int) *int {
if nomorBit != 0 && nomorBit != 1 {
return nil }
 
if angka == 0 {
count := 0
if nomorBit == 0 {
count = 1
}
return &count
}
 
count := 0
temp := angka
 
for temp > 0 {
sisa := temp % 2
if sisa == nomorBit {
count++
}
temp = temp / 2
}
return &count
 
}
 
func main(){
	fmt.Println(*hitungNomorBit(13,0))
	fmt.Println(*hitungNomorBit(13,1))
	fmt.Println(hitungNomorBit(13,2))
}

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