N=int(input())
G=[[]for i in range(N+1)]
T=[10**20 for i in range(N+1)]
G[1].append(2)
for i in range(2,N+1):
    cnt=0
    n=i
    for j in range(14):
        if n//(2**(13-j))==1:
            cnt+=1
        n%=(2**(13-j))
        #print(i,n,cnt)
    G[i].append(i+cnt)
    G[i].append(i-cnt)
#print(G)
ans=1
L=[0 for i in range(N+1)]
L[1]=1
#print(L)
import heapq
Q=[]
heapq.heapify(Q)
heapq.heappush(Q,[2,2])
for i in range(10**7):
    if len(Q)==0:
        break
    else:
        L[Q[0][1]]=Q[0][0]
        S=Q[0][1]
        Le=Q[0][0]
        heapq.heappop(Q)
        #print(G[S])
        #print(L)
        if G[S][0]<=len(L)-1:
            if L[G[S][0]]==0:
                heapq.heappush(Q,[Le+1,G[S][0]])
        if G[S][1]<=len(L)-1:
            if L[G[S][1]]==0:
                heapq.heappush(Q,[Le+1,G[S][1]])
#print(G)
#print(L)
if L[N]!=0:
    print(L[N])
else:
    print(-1)