import java.util.Arrays; import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); int n=sc.nextInt(); int k=sc.nextInt(); int[]a=new int[n]; for (int i = 0; i < a.length; i++) { a[i]=sc.nextInt(); } Arrays.sort(a); int res=a[a.length-k]-a[k-1]; String result=""; if(res<2) result="NO";else{ for (int i = 2; i <=Math.sqrt(res); i++) { if(res%i==0){ result="NO"; break;} } if(!result.equals("NO")) result="YES"; } System.out.println(result+"\n"+res); } }
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