import sequtils,strutils,deques

proc powInt(n : int64, m : int64, k = 1_000_000_007):int64 =
    if m == 0:
        return 1
    elif m == 1:
        return (n mod k)
    if (m mod 2) == 0:
        return powInt((n*n) mod k,m div 2, k) mod k
    else:
        return (powInt((n*n) mod k,m div 2, k) * n) mod k

proc p2(y:int):int =
    return powInt(2.int64,y.int64).int


type
    bound = tuple[fro : int, to:int , times : int]
var
    N = stdin.readline.parseInt
    A = newSeq[bound](0)
    miti,miti2 : bound
    Min_t = newSeqWith(N + 1,high(int) - 1000)
    masu : int
    n,m : int


Min_t[1] = 0
miti2 = (0,1,1)
A.add(miti2)
m = 0
while A.len > m:
    masu = 0
    miti = A[m]
    n = miti.to
    for i in 0..14:
        if (p2(i) and n) > 0:
            masu += 1
    if n + masu <= N:
        if Min_t[n + masu] > miti.times + 1:
            Min_t[n + masu] = miti.times + 1
            miti2 = (n,n + masu,miti.times + 1)
            A.add(miti2)
    if n - masu >= 1:
        if Min_t[n - masu] > miti.times + 1:
            Min_t[n - masu] = miti.times + 1
            miti2 =(n,n - masu,miti.times + 1)
            A.add(miti2)
    m += 1
if Min_t[N] == high(int) - 1000:
    echo -1
else:
    echo Min_t[N]