#include<stdio.h>

int main(void){
	int box;
	int num;
	int boxlen;
	int boxsum = 0;
	int innum = 0;
	int i;

	scanf("%d",&box);
	scanf("%d",&num);
	for(i = 0;i < num;i++){
		scanf("%d",&boxlen);
		boxsum = boxsum + boxlen;
		if(box >= boxsum){
			innum++;
		}
	}
	printf("%d\n",innum);

}