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

int compare_int(const void *a, const void *b) {
    return *(int *)a - *(int *)b;
}

int main(void) {
    int boxSize, number = 0, block[10000], maxNumber, width, i;

    scanf("%d", &boxSize);
    scanf("%d", &number);
    for (i = 0; i < number; i++)
        scanf("%d", &block[i]);

    qsort(block, number, sizeof(int), compare_int);
    maxNumber = width = 0;

    for(i=0; i < number; i++) {
        width += block[i];
        if (width <= boxSize)
            maxNumber++;
        else
            break;
    }

    printf("%d\n", maxNumber);

    return 0;
}