#include <bits/stdc++.h>
using namespace std;
int main()
{
    int a,b,c[114514],sum;
    cin>>a;
    cin>>b;
    for (int i=1;i<=b;i++)
    {
        cin>>c[i];
    }
    for (int i=1;i<=b;i++)
    {
        if (a<c[i])
        {
            sum++;
        }
        else
        {
            a-=c[i];
        }
    }
    cout<<sum;
}