import sys
import itertools
L = int(sys.stdin.readline().strip())
N = int(sys.stdin.readline().strip())
W = list(map(int,sys.stdin.readline().strip().split()))
WW = sorted(W,reverse=True)
if sum(WW) > L :
    for n in range(N) :
        WW.pop(0)
        if sum(WW) <= L :
            print(len(WW))
            break
else :
    print(len(WW))