N = int(input())
now = 1

line = []
trace = []
for i in range(1, N+1):
    b_num = '{0:b}'.format(i)
    c = 0
    for j in b_num:
        if j == "1":
            c += 1
    line.append(c)
    #print(c, b_num)
c = 1
while 1 :
    if now == N:
        print(c)
        #print(trace)
        break
    else:
        c += 1
        if line[now -1] + now > N:
            if now - line[now -1] <= 0:
                print(-1)
            else:
                now -= line[now -1]
                if str(now) in trace:
                    print(-1)
                    break

        else:
            trace.append(str(now))
            #print(trace)
            now += line[now -1]