Problem:
Score : 200 points

Problem Statement

A ball will bounce along a number line, making N + 1 bounces. It will make the first bounce at coordinate D_1 = 0, and the i-th bounce (2 \leq i \leq N+1) at coordinate D_i = D_{i-1} + L_{i-1}.

How many times will the ball make a bounce where the coordinate is at most X?

Constraints

1 \leq N \leq 100

1 \leq L_i \leq 100

1 \leq X \leq 10000

All values in input are integers.

Input

Input is given from Standard Input in the following format:

N X
L_1 L_2 ... L_{N-1} L_N

Output

Print the number of times the ball will make a bounce where the coordinate is at most X.

Sample Input 1

3 6
3 4 5

Sample Output 1

2

The ball will make a bounce at the coordinates 0, 3, 7 and 12, among which two are less than or equal to 6.

Sample Input 2

4 9
3 3 3 3

Sample Output 2

4

The ball will make a bounce at the coordinates 0, 3, 6, 9 and 12, among which four are less than or equal to 9.

Solution in Scala (2.11.7) (judge verdict: Accepted)

import scala.annotation.tailrec
import scala.collection.mutable
import scala.io.StdIn._
object Main extends App {
  val Array(n, x) = readLine.trim.split(' ').map(_.toInt)
  val ls = readLine.trim.split(' ').map(_.toInt)
  println(
    ls.scan(0){(d, l) ⇒ d + l}.count(_ <= x)
  )
  implicit class Scope[T](val receiver: T) extends AnyVal {
    def let[A](@inline func: T ⇒ A): A = func(receiver)
    def tap(@inline func: T ⇒ Unit): T = {
      func(receiver)
      receiver
    }
  }
}