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

int main(void)
{
    int box_width,num_block;
    int block_width[11000]={};
    int blockcnt=0;
    scanf("%d",&box_width);
    scanf("%d",&num_block);
    for(int i=0;i<num_block;i++)
    {
        scanf("%d",&block_width[i]);
    }
    for(int i=0;i<num_block-1;i++)
    {
        for(int j=i+1;j<num_block;j++)
        {
            if(block_width[i]>block_width[j])
            {
                int numtmp=block_width[i];
                block_width[i]=block_width[j];
                block_width[j]=numtmp;
            }
        }
    }
    for(int i=0;i<num_block;i++)
    {
        box_width=box_width-block_width[i];
        if(box_width<0)
        {
            break;
        }
        blockcnt++;
    }
    printf("%d",blockcnt);
    //return 0;
}