import java.util.*;
 
class Main {
    public static void main(String[] args) {
    	
    	Scanner sc = new Scanner(System.in);

    	int L = sc.nextInt();
    	int N = sc.nextInt();
    	int[] W = new int[N];
    	for(int i = 0; i < N; i++) {
    		W[i] = sc.nextInt();
    	}
    	int i = 0;
    	while(L >= 0) {
   	   		L = L - W[i];
   	   		if(L >= 0) {
   	   			i++;
   	   		} else {
   	   			break;
   	   		}
    	}
    	System.out.println(i);
    }
}