#include <stdio.h>
#include <stdlib.h>
#include <string.h>

void sort(int *x, size_t s);

void swap(int *a, int *b);

int main(void) {
    int L, N;
    int W[10000] = {0};
    int *pW;
    int sW;
    pW = W;
    sW =  sizeof(W) / sizeof(W[0]);

    scanf("%d", &L);
    scanf("%d", &N);

    for (int i = 0; i < N; i++) {
        scanf("%d", &W[i]);
    }
    
    sort(pW, sW);
    
    int sum = 0;
    int Nmax = N;
    for (int i = 0; i < sW; i++) {
        if (W[i] == 0) {
            Nmax = i;
            break;
        }
        sum += W[i];
        if (sum > L) {
            Nmax = i;
            break;
        }
    }

    printf("%d\n", Nmax);
    return EXIT_SUCCESS;
}

void sort(int *x, size_t s) {
    for (int i = s; i > 1; i--) {
        for (int j = 1; j < i; j++) {
            if (*(x+j) == 0) {
                break;
            } else if (*(x+j-1) > *(x+j)) {
                swap(x+j-1, x+j);
            }
        }
    }
    return;
}

void swap(int *a, int *b) {
    int t;
    t = *a;
    *a = *b;
    *b = t;
    return;
}