import std.stdio,
       std.conv,
       std.string,
       std.range,
       std.math,
       std.bigint,
       std.algorithm,
       core.bitop;
enum INF = int.max;

void main()
{
    auto N = readln.strip.to!int;

    auto dice = iota(N + 1).map!(e => popcnt(e)).array;
    auto memo = new int[](N + 1);
    memo[] = INF;
    int solve(int i, int c)
    {
        if (i < 1 || i > N || memo[i] < c)
            return INF;

        if (i == N)
            return c;

        memo[i] = c;
        auto f = solve(i + dice[i], c + 1);
        auto b = solve(i - dice[i], c + 1);
        return min(f, b);
    }
    auto ans = solve(1, 1);
    (ans == INF ? -1 : ans).writeln;
}