N = int(input())

spaces = [float("inf")] * (N + 1)
bits = {i: str(bin(i))[2:].count("1") for i in range(N + 1)}
spaces[1] = 0

visited = [False] * (N + 1)


def dfs(i, p):
    if not 0 < i < N + 1:
        return None
    if visited[i]:
        return None
    visited[i] = True
    spaces[i] = min(spaces[i], p)
    dfs(i + bits[i], p+1)
    dfs(i - bits[i], p+1)
    visited[i] = False


dfs(1, 1)

ans = -1 if spaces[N] == float("inf") else spaces[N]
print(ans)