#include <stdio.h>

int main(void){
	int boy,girl;
	scanf("%d %d",&boy,&girl);
	boy ++;
	if(boy <= girl){
		printf("YES\n");
	}else{
		printf("NO\n");
	}
	int countDifference = boy - girl;
	if(countDifference < 0){
		countDifference *= -1;
	}
	printf("%d",countDifference);
}