void main() {
	enum INF = 10 ^^ 9;
	const N = readInt;
	auto dp = new int[N + 1];
	dp[] = INF;
	dp[1] = 1;
	foreach (i; 0 .. N) foreach (j; 1 .. N) {
		int x = j + popcnt(j);
		int y = j - popcnt(j);
		if (x <= N) chmin(dp[x], dp[j] + 1);
		if (y > 0) chmin(dp[y], dp[j] + 1);
	}
	int ans = dp[N];
	if (ans == INF) ans = -1;
	ans.writeln;
}

import std,core.bitop;
string[]_R;
string readString(){while(_R.empty){_R=readln.chomp.split;}auto ret=_R.front;_R.popFront;return ret;}
int readInt(){return readString.to!int;}
long readLong(){return readString.to!long;}
ulong readULong(){return readString.to!ulong;}
real readReal(){return readString.to!real;}
bool chmin(T)(ref T A,T B){if(A>B){A=B;return true;}else{return false;}}
bool chmax(T)(ref T A,T B){if(A<B){A=B;return true;}else{return false;}}
int lowerBound(T)(T[]A,T x){int L=-1,R=cast(int)A.length;while(R-L>1){int mid=(L+R)/2;(A[mid]<x?L:R)=mid;}return R;}
int upperBound(T)(T[]A,T x){int L=-1,R=cast(int)A.length;while(R-L>1){int mid=(L+R)/2;(A[mid]<=x?L:R)=mid;}return R;}