package main

import (
	"fmt"
	"strconv"
	"strings"
)

func main() {
	var n, radix int
	if _, err := fmt.Scan(&n, &radix); err != nil {
		return
	}
	var sum int64
	for i := 0; i < n; i++ {
		var s string
		fmt.Scan(&s)
		v, _ := strconv.ParseInt(s, radix, 64)
		sum += v
	}
	fmt.Print(strings.ToUpper(strconv.FormatInt(sum, radix)))
}