import java.util.Scanner;
public class Main
{
 	public static void main(String[] args)
    {
     	 Scanner sc = new Scanner(System.in);
      	String[] word = sc.nextLine().split(" ");
      	int[] num = new int[4];
      	for(int i = 0; i < 4; i++)
        {
         	num[i] = Integer.parseInt(word[i]); 
        }
      
      	int a = num[0] / num[3];
      	int b = num[2] / num[1];
      
      	if(num[0] % num[3] != 0)
        {
         	a++; 
        }
      
      	if(num[2] % num[1] != 0)
        {
         	b++; 
        }
      
      	if(a >= b)
        {
          	System.out.println("Yes");
        }else{
          	System.out.println("No");
        }
    }
} import java.util.Scanner; Scanner java.util public class Main
{
 	public static void main(String[] args)
    {
     	 Scanner sc = new Scanner(System.in);
      	String[] word = sc.nextLine().split(" ");
      	int[] num = new int[4];
      	for(int i = 0; i < 4; i++)
        {
         	num[i] = Integer.parseInt(word[i]); 
        }
      
      	int a = num[0] / num[3];
      	int b = num[2] / num[1];
      
      	if(num[0] % num[3] != 0)
        {
         	a++; 
        }
      
      	if(num[2] % num[1] != 0)
        {
         	b++; 
        }
      
      	if(a >= b)
        {
          	System.out.println("Yes");
        }else{
          	System.out.println("No");
        }
    }
} Main public static void main(String[] args)
    {
     	 Scanner sc = new Scanner(System.in);
      	String[] word = sc.nextLine().split(" ");
      	int[] num = new int[4];
      	for(int i = 0; i < 4; i++)
        {
         	num[i] = Integer.parseInt(word[i]); 
        }
      
      	int a = num[0] / num[3];
      	int b = num[2] / num[1];
      
      	if(num[0] % num[3] != 0)
        {
         	a++; 
        }
      
      	if(num[2] % num[1] != 0)
        {
         	b++; 
        }
      
      	if(a >= b)
        {
          	System.out.println("Yes");
        }else{
          	System.out.println("No");
        }
    } main {
     	 Scanner sc = new Scanner(System.in);
      	String[] word = sc.nextLine().split(" ");
      	int[] num = new int[4];
      	for(int i = 0; i < 4; i++)
        {
         	num[i] = Integer.parseInt(word[i]); 
        }
      
      	int a = num[0] / num[3];
      	int b = num[2] / num[1];
      
      	if(num[0] % num[3] != 0)
        {
         	a++; 
        }
      
      	if(num[2] % num[1] != 0)
        {
         	b++; 
        }
      
      	if(a >= b)
        {
          	System.out.println("Yes");
        }else{
          	System.out.println("No");
        }
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String[] word = sc.nextLine().split(" "); word sc.nextLine().split(" ") sc.nextLine().split sc.nextLine() sc.nextLine sc " " int[] num = new int[4]; num new int[4] 4 for(int i = 0; i < 4; i++)
        {
         	num[i] = Integer.parseInt(word[i]); 
        } int i = 0; int i = 0; i 0 i < 4 i 4 i++ i++ i {
         	num[i] = Integer.parseInt(word[i]); 
        } {
         	num[i] = Integer.parseInt(word[i]); 
        } num[i] = Integer.parseInt(word[i]) num[i] num i Integer.parseInt(word[i]) Integer.parseInt Integer word[i] word i int a = num[0] / num[3]; a num[0] / num[3] num[0] num 0 num[3] num 3 int b = num[2] / num[1]; b num[2] / num[1] num[2] num 2 num[1] num 1 if(num[0] % num[3] != 0)
        {
         	a++; 
        } num[0] % num[3] != 0 num[0] % num[3] num[0] num 0 num[3] num 3 0 {
         	a++; 
        } a++ a if(num[2] % num[1] != 0)
        {
         	b++; 
        } num[2] % num[1] != 0 num[2] % num[1] num[2] num 2 num[1] num 1 0 {
         	b++; 
        } b++ b if(a >= b)
        {
          	System.out.println("Yes");
        }else{
          	System.out.println("No");
        } a >= b a b {
          	System.out.println("Yes");
        } System.out.println("Yes") System.out.println System.out System System.out "Yes" {
          	System.out.println("No");
        } System.out.println("No") System.out.println System.out System System.out "No" String[] args args public class Main
{
 	public static void main(String[] args)
    {
     	 Scanner sc = new Scanner(System.in);
      	String[] word = sc.nextLine().split(" ");
      	int[] num = new int[4];
      	for(int i = 0; i < 4; i++)
        {
         	num[i] = Integer.parseInt(word[i]); 
        }
      
      	int a = num[0] / num[3];
      	int b = num[2] / num[1];
      
      	if(num[0] % num[3] != 0)
        {
         	a++; 
        }
      
      	if(num[2] % num[1] != 0)
        {
         	b++; 
        }
      
      	if(a >= b)
        {
          	System.out.println("Yes");
        }else{
          	System.out.println("No");
        }
    }
} public class Main
{
 	public static void main(String[] args)
    {
     	 Scanner sc = new Scanner(System.in);
      	String[] word = sc.nextLine().split(" ");
      	int[] num = new int[4];
      	for(int i = 0; i < 4; i++)
        {
         	num[i] = Integer.parseInt(word[i]); 
        }
      
      	int a = num[0] / num[3];
      	int b = num[2] / num[1];
      
      	if(num[0] % num[3] != 0)
        {
         	a++; 
        }
      
      	if(num[2] % num[1] != 0)
        {
         	b++; 
        }
      
      	if(a >= b)
        {
          	System.out.println("Yes");
        }else{
          	System.out.println("No");
        }
    }
} Main
import java.util.Scanner;
public class Main
{
 	public static void main(String[] args)
    {
     	 Scanner sc = new Scanner(System.in);
      	String[] word = sc.nextLine().split(" ");
      	int[] num = new int[4];
      	for(int i = 0; i < 4; i++)
        {
         	num[i] = Integer.parseInt(word[i]); 
        }
      
      	int a = num[0] / num[3];
      	int b = num[2] / num[1];
      
      	if(num[0] % num[3] != 0)
        {
         	a++; 
        }
      
      	if(num[2] % num[1] != 0)
        {
         	b++; 
        }
      
      	if(a >= b)
        {
          	System.out.println("Yes");
        }else{
          	System.out.println("No");
        }
    }
}