haba = int(input());
kazu = int(input());
suti = input();
sutidata = suti.split(" ");
sutidatain = sutidata.sort(key=int);
sumdata=0;
result = 0;

for inter in range(0,kazu):
    sumdata = sumdata + int(sutidata[inter]);
    if haba >= sumdata:
        result= result+1;

print(result);