import sys
sys.setrecursionlimit(10000)
N = int(input())
Q = [1]
t = 0

def bin1(n):
    return bin(n).count("1")

def find(x,c):
    global Q
    global t
    d = bin1(x)
    if t == 0 and x == N:
        t = c
    if t == 0 and x-d not in Q and x-d >0:
        Q.append(x-d)
        find(x-d,c+1)
    if t == 0 and x+d not in Q and x+d <N+1:
        Q.append(x+d)
        find(x+d,c+1)

find(1,1)
print(t if t != 0 else -1)