def max_blocks_in_box(L, widths):
    widths.sort()  
    total_width = 0
    count = 0
    
    for w in widths:
        if total_width + w <= L:
            total_width += w
            count += 1
        else:
            break 
    
    return count


L = int(input())
N = int(input())
widths = list(map(int, input().split()))

result = max_blocks_in_box(L, widths)
print(result)