2018年9月22日
CodeForces - 707C
摘要： Katya studies in a fifth grade. Recently her class studied right triangles and the Pythagorean theorem. It appeared, that there are triples of positiv 阅读全文
posted @ 2018-09-22 20:38 Daybreaking 阅读(178) 评论(0) 推荐(0)