#include <stdio.h>
int main(void){
    int boys, girls;
    int ans = 0;
    scanf( "%d %d", &boys, &girls );
    if( boys + 1 <= girls ){
        printf( "YES\n" );
    }else{
        printf( "NO\n" );
    }
    ans = boys + 1 - girls;
    printf( "%d\n", ans < 0 ? ans * -1 : ans );
}