50-50 Rule

Schools of Chefland use the $50-50$ rule to grade their students. As per the rule , students are awarded : - `Z` grade, if their attendance is strictly less than $50\%$ . - `F` grade, if they score strictly less than $50\%$ marks, given that their attendance is greater than or equal to $50\%$ . - `A` grade, otherwise. You are given two integers, $X$ and $Y$, denoting the percentage of attendanc