L = int(input())
input()
W = list(map(int,input().split()))
W.sort()
sum = 0
for i in range(0,len(W)):
    sum += W[i]
    if(sum > L):
        if(i == 0):
            print(1)
        elif():
            print(str(i))
        break
    elif(i == len(W) - 1):
        print(len(W))