#860 Pachete1

#include <iostream>
using namespace std;
int main()
{
    int n;
    cin >> n;
    int c;
    cin >> c;
    int tmp;
    int s=0;
    int cnt=1;
    while (n)
    {
            cin >> tmp;
            s+=tmp;
            if ( s > c)
            {
                cnt++;
                s=tmp;
            }
            n--;
    }
    cout << cnt;
    return 0;
}