#include <bits/stdc++.h>
using namespace std;
int n, x;
vector <int> a;
int main(){
	cin >> n >> x;
	for(int i = 1; i <= n; i++){
		int m;cin >> m;
		a.push_back(m);
	}
	int cnt = 0, ans = 0;
	string s;
	while(a.size() >= 2){
		int num1 = a.back();a.pop_back();
		int num2 = a.back();
		cnt += num1 + num2;
		while(cnt >= x){
			ans++;
		}
		s += ans;
	}
	auto mmax_s = max_element(s.begin(), s.end());
	cout << *mmax_s << endl;
	return 0;
}