n = int(input())
dp = [1]
ans = 1
while dp[-1] < n:
    dp_bin = bin(dp[-1])
    bit = dp_bin.count('1')
    if dp[-1] + bit > n:
        if dp[-1] - bit < 1 or dp[-1] - bit in dp:
            print(-1)
            exit()
        else:
            dp.append(dp[-1] - bit)
            ans += 1
            # print(dp)
    else:
        dp.append(dp[-1] + bit)
        ans += 1
        # print(dp)

print(ans)