C++ :

#include<bits/stdc++.h>
using namespace std;
int main(){
	int c,s,a1,a2,a3;
	cin>>c>>s>>a1>>a2>>a3;
	c=a1+a2+a3;
	if(c<=20)cout<<"YES"<<endl;
	else cout<<"NO"<<endl;
	return 0;
}

Pascal :

var a,b,c,d,e,g:longint;
f:real;
begin
read(a,b,c,d,e);
f:=a/b+c+d+e;
if f<=20 then write('YES')
         else write('NO');
         end.

Java :

import java.util.Scanner;

public class Main{
	public static void main(String[] arjs) {
		Scanner sc =new Scanner(System.in);
		int n =sc.nextInt();
		int a =sc.nextInt();
		int b =sc.nextInt();
		int c =sc.nextInt();
		int e =sc.nextInt();
		int k =n*a;
		if(k>a*e+(b+c)) {
			System.out.println("YES");
		}else {
			System.out.println("NO");
		}
		
	}
}