#include <iostream>
#include <vector>
using namespace std;

int main() {
	int l, n;
	cin >> l >> n;
	vector<int> w(n);
	for (auto &x : w) cin >> x;
	int sum = 0;
	for (int i = 0; i < n; ++i) {
		sum += w[i];
		if (sum > l) {
			cout << i << endl;
			return 0;
		}
	}
	cout << n << endl;
}