def main():
    l = int(input())
    n = int(input())
    w = [int(i) for i in input().split()]
    w.sort()
    s = 0
    for i in range(n):
        s += w[i]
        if l < s:
             print(i) 
             exit() 
    print(n)         

if __name__ == '__main__':
    main()