#pragma GCC optimize("Ofast")
#pragma GCC target("avx2")

#define rd() ({long _v=0,_c;while(_c=*rp++-48,_c>=0)_v=_v*10+_c;_v;})
#define rep3(v,s,e) for(typeof(e) v=s;v<e;++v)

long a[128]={1,1};

void found(int k){
	if(k<10){
		k+=48;
		write(1,&k,1);
	}else{
		k=k/10+k%10*256+12336;
		write(1,&k,2);
	}
	_exit(0);
}

int main(){
	long n;
	{
		char rbuf[64];
		read(0,rbuf,sizeof rbuf);
		char*rp=rbuf;
		n=rd();
	}
	if(n==1){
		found(2);
	}
	rep3(k,2,61){
		a[k]=1ll<<k-1;
		for(int j=k;a[j]<=n;++j){
			if(n==a[j]){
				found(k);
			}
			a[j+1]=a[j]*2-a[j-k];
		}
	}
	write(1,"-1",2);
	_exit(0);
}