#include<cstdio>
int main(){
	int m,n,i,a[100]={0},b=0;
	scanf("%d %d",&m,&n);
	for(i=1;i<=n;i++){
		scanf("%d",&a[i]);
	}
	for(i=1;i<=n;i++){
		if((m-a[i])>=0){
			m=m-a[i];b++;
		}
	}
	printf("%d",n-b);
}