package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
)

var sc = bufio.NewScanner(os.Stdin)
var rdr = bufio.NewReaderSize(os.Stdin, 1000000)

func main() {
	sc.Split(bufio.ScanWords)
	n, k := nextInt(), nextInt()
	s := nextLine()
	ns := make([]int, n)
	for i, r := range s {
		v, _ := strconv.Atoi(string(r))
		ns[i] = v
	}

	c, w := 0, 0
	for {
		for _, v := range ns {
			k--
			if w == 0 {
				c++
			} else {
				w--
			}
			w += v
			if k == 0 {
				fmt.Println(c)
				return
			}
		}
	}
}

func nextLine() string {
	sc.Scan()
	return sc.Text()
}

func nextInt() int {
	i, _ := strconv.Atoi(nextLine())
	return i
}