from copy import copy
n=int(input())
field=[100000 for i in range(n)]
field[0]=1

def bitcnt(x):
    cnt=0
    while True:
        cnt+=x&1
        x=x>>1
        if x==0:
            break
    return cnt
while True:
    fc=copy(field)
    for i in range(n):
        cnt=bitcnt(i+1)
        if i-cnt>=0:
            field[i-cnt]=min([field[i]+1,field[i-cnt]])
        if i+cnt<n:
            field[i+cnt]=min([field[i]+1,field[i+cnt]])
    if fc==field:
        break
    
if field[n-1]==100000:
    print(-1)
else:
    print(field[n-1])