import std;
void main(){
	auto n=readln.chomp.to!(long);
	long j=cast(long)log2(n);
	long m=n;
	for(;j>0;j--){
		long i=(n^^(1.0/j)).lrint;
		long k=n-(i^^j);
		long kp=n-((i+1)^^j);
		long km=n-((i-1)^^j);
		/*
		stderr.writefln("%d %d %d",i,j,k);
		stderr.writefln("%d %d %d",i,j,kp);
		stderr.writefln("%d %d %d",i,j,km);
		*/
		if(k>=0) m=min(i+j+k,m);
		if(kp>=0) m=min(i+1+j+kp,m);
		if(i>0&&km>=0) m=min(i-1+j+km,m);
	}
	writeln(m);
}