#include <bits/stdc++.h>

using namespace std;

int main() {
    int n, k;
    cin >> n >> k;
    int count = 0;

    int sum = 0;
    for (int i = 1; i <= n; i++) {
        int ai;
        cin >> ai;
        sum += ai;
        if (sum >= k) {
            sum = 0;
            count++;
        }
    }
    //打补丁
    if (sum > 0) count++;
    cout << count << endl;
    return 0;
}