N = int(input())
t = 10**9+7
Q = [t]*N

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

Q = [0]*(N+1)
q = [1]
Q[1] = 1
while q:
    qx = q.pop(0)
    qd = bin1(qx)
    qc = Q[qx]
    if qx + qd < N+1 and Q[qx+qd] == 0:
        Q[qx+qd] = qc + 1
        q.append(qx+qd)
    if qx - qd > 0 and Q[qx-qd] == 0:
        Q[qx-qd] = qc + 1
        q.append(qx-qd)

print(Q[N] if Q[N] != 0 else -1)