#include<stdio.h>

int main(){
    int m,l;
    scanf("%d %d",&m,&l);
    if(m<l){
        printf("YES\n%d",l-m-1);
    }else if(l<m){
        printf("NO\n%d",m-l+1);
    }else{
        printf("NO\n%d",1);
    }
    return 0;
}