[Answer] Mathematics × Programming Competition #8 – Four Digit Calculator
![[Answer] Mathematics × Programming Competition #8 – Four Digit Calculator](https://helloacm.com/wp-content/uploads/2017/10/0159-300x200.png "[Answer] Mathematics × Programming Competition #8 – Four Digit Calculator")
Given a four digit calculator, if you rotate it by 180 degree, you may get another ‘valid’ number. For example, 0159 becomes 6510 if rotated 180 degree. The ‘1’ …
Tag: Mathematics and programming
