import java.util.Arrays;
import java.util.PriorityQueue;
import java.util.Scanner;

class Main {
	public static void main(String[] args) {
		new Main().run();
	}
	
	boolean check(long a,long b,long c) {
		return a>=0&&b>=0&&c>=0&&a!=b&&b!=c&&c!=a&&(b==Math.max(a, Math.max(b, c))||b==Math.min(a, Math.min(b, c)));
	}
	
	int max(long a,long b,long c,long d) {
		int ret=0;
		if(c>=b) {
			long q=(c+1-b+d-1)/d;
			ret+=q;
			c=Math.max(0,c-q*d);
		}
		if(a>=b) {
			long q=(a+1-b+d-1)/d;
			ret+=q;
			a=Math.max(0,a-q*d);
		}
		if(a==c) {
			ret++;
			c=Math.max(0, c-d);
		}
		if(check(a, b, c))return ret;
		else return -1;
	}
	
	int min(long a,long b,long c,long d) {
		int ret=0;
		if(a>c) {
			a^=c;c^=a;a^=c;
		}
		if(a==c) {
			ret++;
			a=Math.max(0, a-d);
		}
		if(a<=b) {
			long q=(b+1-a+d-1)/d;
			ret+=q;
			b=Math.max(0,b-q*d);
		}
		if(check(a, b, c))return ret;
		else return -1;
	}
	
	void run() {
		Scanner sc=new Scanner(System.in);
		long d=sc.nextLong();
		long a=sc.nextLong();
		long b=sc.nextLong();
		long c=sc.nextLong();
		if(d==0) {
			if(!check(a,b,c))System.out.println(-1);
			else System.out.println(0);
			return;
		}
		long INF=Long.MAX_VALUE/3;
		long ans=INF;
		if(min(a, b, c, d)!=-1)ans=Math.min(ans, min(a,b,c,d));
		if(max(a, b, c, d)!=-1)ans=Math.min(ans, max(a,b,c,d));
		System.out.println(ans==INF?-1:ans);
	}
	
	static void tr(Object... objects) {
		System.out.println(Arrays.deepToString(objects));
	}

}