N = int(input())

if N == 1:
    print(1)
else:
    

    num = 1
    trace = [1]
    result = [1]
    while trace != []:
        b = bin(num)
        i = b.count('1')
        if num + i < N:
            if num + i not in result:
                num = num + i
                trace.append(num)
                result.append(num)
            elif num + i  in result and num - i not in result:
                num = num - i
                trace.append(num)
                result.append(num)
            elif num + i  in result and num - i  in result:
                del trace[-1]
                if trace == []:
                    print(-1)
                    break
                else:
                    num = trace[-1]

        
        elif num + i > N:
            if num - i not in result:
                num = num - i
                trace.append(num)
                result.append(num)
            else:
                del trace[-1]
                if trace == []:
                    print(-1)
                    break
                else:
                    num = trace[-1]

        elif num + i == N:
            num = num + i
            trace.append(num)
            result.append(num)
            print(len(trace))
            break