很简单了,
当m>=3&&m<=n+p时是yes
import java.math.BigInteger;
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
while(input.hasNext()){
BigInteger n=input.nextBigInteger();
BigInteger m=input.nextBigInteger();
BigInteger p=input.nextBigInteger();
if(m.compareTo(BigInteger.valueOf(3))>-1&&m.compareTo(n.add(p))<1){
System.out.println("YES");
}
else
System.out.println("NO");
}
}
}