2383: Cupcake Party

A regular box of cupcakes holds 8 cupcakes, while a small box holds 3 cupcakes. There are 28 students in a class and a total of at least 28 cupcakes. Your job is to determine how many cupcakes will be left over if each student gets one cupcake.
一个标准的纸杯蛋糕盒可以装 8 个纸杯蛋糕，而一个小盒子可以装 3 个纸杯蛋糕。有 28 名学生在一个班级中，总共至少有 28 个纸杯蛋糕。你的任务是确定，如果每个学生得到一个纸杯蛋糕，将会剩下多少个纸杯蛋糕。

The input consists of two lines. 
• The first line contains an integer R ≥ 0, representing the number of regular boxes. 
• The second line contains an integer S ≥ 0, representing the number of small boxes.
输入由两行组成。
第一行包含一个整数 R ≥ 0，代表标准盒子的数量。 
第二行包含一个整数 S ≥ 0，代表小盒子的数量。

Output the number of cupcakes that are left over.
输出剩余的纸杯蛋糕数量.

2
5

3