fi=open('BITSUM.INP','r')
fo=open('BITSUM.OUT','w')
n=int(fi.readline().strip())
def dem_bit(n):
dem=0
for i in range(1,n+1):
tmp=i
while tmp>0:
dem+=1
tmp&=tmp-1
return dem
fo.write(str(dem_bit(n))+'\n')
fo.close()
fi.close()