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

iSum = 0;
iCnt = 0;
for i in range( N ):
	if iSum + W[ i ] <= L:
		iSum += W[ i ]
		iCnt += 1
	else:
		break

print( iCnt )