L=int(input())
N=int(input())
#W=[0]*N

W=list(map(int,input().split()))

for i in range(N):
    for j in range(i+1,N):
        if W[i] > W[j]:
            tmp=W[j]
            W[j]=W[i]
            W[i]=tmp

S=0
i=0
while L >= S:
    S+=W[i]
    i+=1

print(i-1)