#include <bits/stdc++.h>
using namespace std;
int n, m, sum;
int a[10010];
int main() {
	cin >> n >> m;
	for (int i = 1; i <= n; i++) {
		cin >> a[i];
	}
	while (n > 0 && m > 0) {
		m -= a[n];
		n--;
		if (m >= 0) sum++;
	}
	cout << sum << '\n';
	return 0;
}