n = int(input())
w = 1
count = 1
lis = []
while w != n:
    steps = list(str(bin(w)))[2:]
    num = 0
    for j in steps:
        num += int(j)
        
    if w + num > n:
        w -= num
        if w < 1:
            count = -1
            break 
        
        if w in lis:
            count = -1
            break
    
    else:
        w += num
        if w in lis:
            count = -1
            break
    
    lis.append(w)
    count += 1
print(count)