ol_4_13

#include <iostream>
#include <fstream>

using namespace std;

int main()
{
    ifstream cin("input.txt");

    int s, n;
    cin>>s>>n;

    int rc = 1, curs = 0;
    for(int i = 0; i < n; i++)
    {
        int cur;
        cin>>cur;
        if (curs + cur > s)
        {
            rc++;
            curs = 0;
        }
        curs += cur;
    }
    cout<<rc;
}