#include <stdio.h>

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