package main

import "fmt"

func digitSum(n int) int {
	s := 0
	for n > 0 {
		s += n % 10
		n /= 10
	}
	return s
}

func main() {
	var a int
	fmt.Scan(&a)
	for digitSum(a)%4 != 0 {
		a++
	}
	fmt.Println(a)
}