popcount = lambda n: bin(n).count('1')
INF = 1001001001
N = int(input())

pop = [popcount(x) for x in range(N)]
dp = [INF] * (N+1)
dp[1] = 1

while True:
    changed = False
    for i in range(1, N):
        if dp[i] == INF: continue
        j = i + pop[i]
        if j <= N and dp[i] + 1 < dp[j]:
            dp[j] = dp[i] + 1
            changed = True 
        j = i - pop[i]
        if i >= 0 and i != j and dp[i]+1 < dp[j]:
            dp[j] = dp[i]+1
            changed = True
    if not changed:
        break

print(-1 if dp[N] == INF else dp[N])