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

int main(void) {
	
	int box_width;
	int block_all;
	int count = 0;
	int i, j, tmp;
	
	scanf("%d %d", &box_width, &block_all);
	
	int block[block_all];
	for(i = 0; i< block_all; i++)
		scanf("%d", &block[i]);
	
	//sort
	for (i = 0; i < block_all - 1; i++){
        for (j = block_all - 1; j > i; j--){
            if (block[j - 1] > block[j]){
                tmp = block[j];
                block[j] = block[j - 1];
                block[j - 1]= tmp;
            }
        }
	}
	
	int sum = 0;
	for(count = 0; count < block_all; count++){
		sum += block[count];
		if(sum > box_width) break;
	}
	
	printf("%d\n", count);

	return 0;
}