#include <bits/stdc++.h>
using namespace std;
int m, n, a[555], sum;
int main() {
    scanf("%d%d", &m, &n);
    for (int i = 1 ; i <= n ; i ++)
        scanf("%d", a[i]);
    for (int i = 1 ; i <= n ; i ++)
        if (a[i] <= m)
            m -= a[i];
        else
            sum ++;
    printf("%d", sum);
    return 0;
}