import java.util.*;

public class Main {
	static Scanner sc = new Scanner(System.in);
	public static void main(String[] args) {
		int n = sc.nextInt();
		int m = sc.nextInt();
		long[] ar = new long[n];
		int num = 0;
		for (int i=0; i<n; i++) {
			if (i==0) {ar[0] = sc.nextInt();}
			else {
				ar[i] = sc.nextInt() + ar[i-1];
			}
			if (ar[i]>=m) {num = i+1; break;}
		}
		System.out.println(num);
	}
}