import java.util.Scanner;

class sampleA {
	public static void main(String args[]) {
		Scanner scan = new Scanner(System.in);
		int l = scan.nextInt();
		int n = scan.nextInt();
		int sumW = 0;

		for (int i = 1; i <= n; i++) {
			int w = scan.nextInt();
			if (sumW + w <= l) {
				sumW += w;

			} else {
				System.out.print(i);
				break;
			}
		}
	}
}